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  1. #201
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    Depending on which generation Mundo you have, you may also need a new headset. At the back you may have a hard time shifting to low gears, so a longer bottom bracket axle or a different rear hub may be needed (take a look at my Yuba at the beginning of this thread.

  2. #202
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    Quote Originally Posted by fox1965 View Post
    Depending on which generation Mundo you have, you may also need a new headset. At the back you may have a hard time shifting to low gears, so a longer bottom bracket axle or a different rear hub may be needed (take a look at my Yuba at the beginning of this thread.
    It is a version 4 (2011). Any difference between the Moonlander or Necro forks? I think they are the same except for paint.

  3. #203
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    You have to look at these fork characteristics - axle to crown distance, width, offset, trail (trail is a result of fork-frame-wheel combo, so you will not find it). Both Yuba and Surly should be able to tell you other data. Then choose an offset and the axle-crown distance closest to your current fork. My old version Surly fork came pretty close. It put the bottom bracket a bit higher and gave my Yuba a livelier feel, which I find as a good think in the end. Good luck and post the picture after you are done.

  4. #204
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    Fresno check out Motormans Fat Mundo thread for some more detail of his build.

    Some fork comparison numbers;
    Yuba standard v4 fork axle to crown 418mm, fork offset 59mm
    Surly Pugs fork axle to crown 447mm, fork offset 43mm
    Surly Big Dummy fork axle to crown 425mm, fork offset 43mm

    I imagine that the higher than usual fork offset if the Yuba is designed to give a more stable ride. I don't know, but that it might be more important if using the big front rack loaded?

    When I put the numbers through a trail calculator putting a BD fork on gave the same trail numbers as my rigid MTB, which is probably why folk with that set up report it feeling more nimble. I guess it also makes it feel more normal.

    The Clown shoe rim and Moonlander fork are probably overkill unless you have a specific purpose.

    If you go with the Pugs 100mm fork you could use the standard rim or perhaps a standard front wheel with a 42mm - 50mm.

    It's worth considering the effect of much larger tyres and longer forks raising the BB. Good for off road clearance, but harder to control the loaded weight when starting and stopping

  5. #205
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    My Yuba has two months and around 800 km. It serves well and during its operation I am identifying things to improve. One of them is the gear ratio. On my way to the downtown there is a long, moderate descent. On my road bike I use to go there around 60 kmph. Yuba has a 24/34/44 chainwheel and that in the combination with the 14 rings on the smallest freewheel means, that the bike is slower in the traffic. (I realized this when I tried to overtake the bus leaving the stop: we were going side by side around 200 meters and I was not able to go before it, pedaling as fast as I could. )

    A solution could be changing the chainwheel to something like 22/39/53. I don't need small differences in the possible gear ratios but I still need light ratio to go uphill with a loaded bike.

    Do you have some experiences in changing the front chainwheel? Should I expect any complications?

    Thanks

  6. #206
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    I would not recommend switching to a much bigger chainring. Since Mundo's wheels are further apart than on a regular bicycle, it's bottom bracket (and the largest chainwheel) is relatively lower to the ground when riding over bumps on a changing slope off-road. Would a 13 tooth freewheel fit over the rear axel? Or next time ride behind the bus and overtake it while it stops to un/load passengers:-)

  7. #207
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    Quote Originally Posted by Jozo View Post
    My Yuba has two months and around 800 km. It serves well and during its operation I am identifying things to improve. One of them is the gear ratio. On my way to the downtown there is a long, moderate descent. On my road bike I use to go there around 60 kmph. Yuba has a 24/34/44 chainwheel and that in the combination with the 14 rings on the smallest freewheel means, that the bike is slower in the traffic. (I realized this when I tried to overtake the bus leaving the stop: we were going side by side around 200 meters and I was not able to go before it, pedaling as fast as I could. )

    A solution could be changing the chainwheel to something like 22/39/53. I don't need small differences in the possible gear ratios but I still need light ratio to go uphill with a loaded bike.

    Do you have some experiences in changing the front chainwheel? Should I expect any complications?

    Thanks
    I'm not sure what kind of cranks the stock mundo has. If the rings are removable, you could get a 48t chainring and maybe a 50t if you're lucky, assuming 4 bolt 104mm bcd (bolt circle diameter).

    The more pricey but easy option would be to get a road triple crank and chainring setup, such as a sora or tiagra one. (it's 9sp but that won't matter, worst case scenario, you might need to upgrade the chain too, I don't know what the stock yuba has and can't tell from pics on their site, 8sp chain will work great as upgrade)
    I google it and found one for <90, but you can probably do a bit better looking around
    Shimano 2011 Sora 9-Speed Triple Road Bicycle Crank Set - FC-3403 : Browse All Products
    (edit: just noticed this one doesn't include the necessary hollowtech II bottom bracket, look around as I think you can find a road triple for around this price that does include bb.)
    Sugino makes a nice forged square taper crankset that *might* work with your current bb, but this depends on its length and once again, can't tell this spec from the yuba site (though no manufacturer gives this detail)
    here's the sugino: Sugino XD600 26/36/46 Triple Crankset in Tree Fort Bikes Cranks (cat119)
    and you might need to buy a new bb too, but you won't know until you measure the old one (spindle length[~100-125mm range]) and compare it to what the sugino requires.
    Once you have 5 bolt 110mm bcd you have a lot more chainring options. I have a cheapo steel 50t 5 bolt ring I got for nearly free from a shop that does used bikes.

    The complication is that your front derailleur should roughly match the curvature of the big ring for good shifting. If you go substantially bigger than what you have now, your derailleur might be sub optimal, but you can probably live with that. You just have slide it up the seat-tube until the derailleur cage clears the big ring.

    I'm not sure about how small of a gear you can have on the rear wheel, as this is an unusual wheel, but you do have the option of putting a regular cassette w/ 3/8" to 14mm axle adaptors and then you can go up to 10sp and down to 11t, though changing the number of gears would require new chain, shifters, etc. Replacing your cranks would be the cheap place to start.

    Regarding Fox's comment, yes high bottoming will be more problematic in off-road situations, so this could be applicable, depending on where you take the bike.

  8. #208
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    Xmas Tree

    Xmas Tree
    Attached Thumbnails Attached Thumbnails The Yuba Mundo Thread-img_0801.jpg  

    The Yuba Mundo Thread-img_0800.jpg  

    The Yuba Mundo Thread-img_0799.jpg  

    The Yuba Mundo Thread-img_0803.jpg  

    The Yuba Mundo Thread-img_0802.jpg  


  9. #209
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    Quote Originally Posted by fox1965 View Post
    Xmas Tree
    Nice. Unfortunately, we have an artificial christmas tree, so I can't make this type of transport with my Yuba. But maybe someone from my relatives will need a tree, I must ask them, if they need a transporter

  10. #210
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    Does anybody have a child seat for larger child (5+ yrs) mounted on a Yuba? I hope my daughter will ride her own bike as much as she can, but for longer rides or for travelling through the dense traffic and with no child-safe bike routes the seat is necessary.

    The only applicable product that I have found so far is the GMG Classic 911 (sorry, I can't post link here , you must substitute dot for .: www dot rijwielreus dot nl/yepp/1351-kinderzitje-achter-911-met-voetsteun-8715362002075.html). I am not sure about the mounting. Can be the seat mounted to the rear carrier as is delivered, or some special adapter/DIY work is needed?

    Is the width between the seat's leg supporters sufficient for Yuba?
    Sometimes it can be useful to have only the child seat without the leg supporters (for a big box or Go-getters mounting) - is it possible to remove the supporters? I have found a picture (again, I can't attach the picture www dot senselife dot co dot uk/GMG/GMG_911_underside_2500.jpg), it looks like the horizontal part of the supporters can be unscrewed, but what about the vertical one?

    Perhaps there is another child seat like GMG Classic 911, you can recommend it to me

  11. #211
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    Quote Originally Posted by Jozo View Post
    Nice. Unfortunately, we have an artificial christmas tree, so I can't make this type of transport with my Yuba. But maybe someone from my relatives will need a tree, I must ask them, if they need a transporter
    There's absolutely no reason you can't give your artificial tree a ride around the block!

  12. #212
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    The Bionx was fun for awhile but I ended up selling it. Having the drive wheel up front meant my bike was actually two wheel drive. I am going to have some 65mm rims on this bad boy soon.

  13. #213
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    heavy bulky load

    Just brought home two shoe cabinets, about under hundred pounds each on the loaders. The bike handled just fine. Cabinets seemed to be easier to carry when tied on the bike in the tall position and forward rather than low and partly beyond the rear axle. Looks like getting the center of gravity higher is less of a problem than moving it backwards. Happy new year!
    Attached Thumbnails Attached Thumbnails The Yuba Mundo Thread-img_0806.jpg  


  14. #214
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    Quote Originally Posted by fox1965 View Post
    Looks like getting the center of gravity higher is less of a problem than moving it backwards.
    Good to know, I am planning to buy new kitchen cabinets. But in my case, the taller one will be over 2 m high, so placing it vertically will be a real challenge

  15. #215
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    I tried to load them both vertically and horizontally. Horizontally placed boxes sucked, there was too much load behind the rear axle. Vertically placed boxes were surprisingly easy to carry. But those boxes were only 4ft tall. Good luck and post a picture!

  16. #216
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    Yes, placing something behind the rear axle is really tricky, when my wife and daughter sit on the rear carrier (without child seat), the daughter sits in front and it can be seen on the bike maneuverability. Inverse order of passangers is impossible, my wife serves also as a backrest for the child

  17. #217
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    Quote Originally Posted by Jozo View Post
    Yes, placing something behind the rear axle is really tricky, when my wife and daughter sit on the rear carrier (without child seat), the daughter sits in front and it can be seen on the bike maneuverability. Inverse order of passangers is impossible, my wife serves also as a backrest for the child
    This is why having a solid front basket/rack can be especially helpful. When weight is unavoidable behind the axle, you can make the bike a lot safer by adding weight to the front wheel so you still have proper handling and good steering traction.

    I just use a cheapo rack that mounts to the fork, but hope to eventually get the yuba frame mounted one or find someone to fabricate one for me. Even with only modest weight behind the axle, I am more confident with some weight up front balancing things out. for example, when I put 40lbs of groceries evenly distributed across the rear rack, I like to strap a 12 pack to the front rack. It shows the world my fine choice in beer as well.

  18. #218
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    Quote Originally Posted by PretendGentleman View Post
    This is why having a solid front basket/rack can be especially helpful. When weight is unavoidable behind the axle, you can make the bike a lot safer by adding weight to the front wheel so you still have proper handling and good steering traction.

    I just use a cheapo rack that mounts to the fork, but hope to eventually get the yuba frame mounted one or find someone to fabricate one for me. Even with only modest weight behind the axle, I am more confident with some weight up front balancing things out. for example, when I put 40lbs of groceries evenly distributed across the rear rack, I like to strap a 12 pack to the front rack. It shows the world my fine choice in beer as well.
    My last commuting bike was a 20 years old one additionally equipped with a front rack ("L" shaped Steco with 25 kgs load capacity) and it was really addictive to have a large storing area at hand. I am missing this on my Mundo. In fact, I also bought a front carrier with my Mundo (mounted to the frame but not the bread basket), but it is still not on the bike. The main reason is limited parking space in my flat, the bike is parked between doors and a wardrobe with the front wheel turned right

    On the previous bike I used to ride with a "front loaded" bike, I have two boxes, which can be alternitively attached to the carrier. The bigger one has dimensions 60x40x30 cm and when fully loaded, the bike had a center of gravity on the handlebars. So it was another extreme

  19. #219
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    how to park your Yuba Mundo

    Where space is limited, Yuba Mundo should be parked on its tail. If you are not confident about its stability, bungee-cord it to a screw in the wall or furniture.
    Attached Thumbnails Attached Thumbnails The Yuba Mundo Thread-img_0094.jpg  


  20. #220
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    Quote Originally Posted by fox1965 View Post
    . Cabinets seemed to be easier to carry when tied on the bike in the tall position and forward rather than low and partly beyond the rear axle. Looks like getting the center of gravity higher is less of a problem than moving it backwards. Happy new year!
    Not sure if it is still there, but the Yuba site used to have a video where Ben is using a Mundo to deliver two more Mundos to the shipping office, carrying them tall-wise as you found works best.

    Carrying weight low makes the bike easier to manage when stopped and/or parked. Carrying weight high, as long as it is secure, actually makes the bike more stable when moving, because it tends to fall over slower, giving more time for the bike or rider to steer the wheels back under the load.

    Carrying weight behind the rear axle is bad for several reasons. One that many do not appreciate is that when you steer left, weight behind the axle actually moves to the right before the whole shebang starts moving to the left. This is the wrong direction for balancing. You can carry _some_ weight back there, but it needs to be more than offset by the weight of the rider, bike, and loads carried well forward.

  21. #221
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    Does somebody have Yuba Go-getter bag in silver/gray version? (photo).
    I would like to buy this bag (preferably in black/orange colour), but at the local bike shop they have only the grey version and I am afraid that it will be very dirty after some time. Is it so?

  22. #222
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    Quote Originally Posted by gumby_kevbo View Post
    Carrying weight low makes the bike easier to manage when stopped and/or parked. Carrying weight high, as long as it is secure, actually makes the bike more stable when moving, because it tends to fall over slower, giving more time for the bike or rider to steer the wheels back under the load.

    Carrying weight behind the rear axle is bad for several reasons. One that many do not appreciate is that when you steer left, weight behind the axle actually moves to the right before the whole shebang starts moving to the left. This is the wrong direction for balancing. You can carry _some_ weight back there, but it needs to be more than offset by the weight of the rider, bike, and loads carried well forward.
    I disagree with some of your ideas. while having the weight high does make tipping slower, it also means you have to do a lot more to keep the weight up there; you just have more time to do it. Practically speaking, a lower center of gravity on a cargo bike is almost always going to make the bike easier to handle, which might include tipping faster, but nobody cares if your 100 lb load on a fifty foot tall pole tips over slowly.

    To me the big thing about loads behind the axle isn't what direction they go when I turn, but that those loads can unweight the front wheel Having a good bit of weight on the front wheel is extremely important so that you get good traction during turns and braking. This is why I wouldn't want to ride an unloaded bakfiets down a big hill and try to stop quickly...not enough weight on the front wheel (or at least I suspect, but never actually tried this).

  23. #223
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    Yestarday I was going to work on my older bike and had some technical difficulties during ride, so I had to leave it locked halfway near a shopping mall.

    In the evening I came with my Mundo and for the first time tried towing. The second bike (with a front carrier and a box on it) was attached to the left side, all lights turned on and the ride could start. The bikes were perfectly ridable, only minus was the weight (both bikes had almost 50 kg together) and it was slight uphill from the mall to my home - I feeled it like a steep uphill in fact. Streets were empty at that time. Fog, no pedestrians, only few cars, but their drivers were looking curiosly and surprised, like the did not believe their own eyes

    Before action
    The Yuba Mundo Thread-before.jpg
    Ready to go
    The Yuba Mundo Thread-readytogo.jpg
    Mission completed
    The Yuba Mundo Thread-home.jpg

  24. #224
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    Jozo: What was the "technical difficulty?"

  25. #225
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    Problem with the freewheel after long winter with lack of servicing I was planning to put it to service next week, but unfortunately it did not last so long

  26. #226
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    Quote Originally Posted by Jozo View Post
    Problem with the freewheel after long winter with lack of servicing I was planning to put it to service next week, but unfortunately it did not last so long
    Reasons like this are why I avoided the complete. Fortunately, you can get bmx-style 3/8" to 14mm axle adapters and use a modern cassette hub. rear qr axles are 10mm and 3/8" is ~9.5mm, so you have to file out a bit of material, but it works well with a very tight qr (275 lb load plus my 190lb). Modern cassette hubs tend to be much longer lasting than multi-speed freewheels. and you have a wider range of gear options such as a 9sp 11-36t slx cassette.

    If the freewheel is just siezing, a penetrating or other thin oil dripped in from the back side (best choice is to do this with freewheel removed from hub to avoid washing out hub bearing grease) will often make it happy for many more miles.
    Last edited by PretendGentleman; 02-28-2013 at 05:03 AM.

  27. #227
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    Good job!

    Wow! I really like the idea of full fat yuba! Must have took all the tractor abilities from both worlds!

    I like the idea of fat bikes and I also like cargobikes. This could be such crazy thing I would do myself if got the coin for it.

  28. #228
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    I finally completed my fat Yuba. I used an old Surly fork with Surly tire in the front and NuVinci360 hub and Remerx Jumbo rim and Surly Endomorph tire at the back. The rear cog is 22 teeth Surly with the original Yuba crank and 42 teeth in the front (I could go as low as 40 teeth). This allowed me to move the chain enough to the right that it does not rub the tire. I had to keep the derailleur to keep the chain properly adjusted. The ride is perfect, you sit higher and kids at the back are happier (more cushioning from 4 inches of a tire). Suddenly the curbs are no obstacle to this monster. Snow, mud, grass, rock gardens - no problem!
    Attached Thumbnails Attached Thumbnails The Yuba Mundo Thread-yubasmall.jpg  


  29. #229
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    clearance between chain and tire

    clearance between chain and tire
    Attached Thumbnails Attached Thumbnails The Yuba Mundo Thread-p1000695.jpg  


  30. #230
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    Fat Yuba in the house!!!!!

    Very nice Fox! How do you like the Nuvinci so far? I am building a Nuvinci360 wheel for mine too, just waiting on a hoop to come into stock. I dont know what those wheel skirts are but they look perfect on there.

  31. #231
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    Sand transport

    Transporting a sandbag remaining after Danube flood
    The Yuba Mundo Thread-yuba_sand.jpg

  32. #232
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    Made a back deck.


  33. #233
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    Anyone ever mount a Rohloff IGH on their Mundo? If so I would love to see pictures.

    OS RL

  34. #234
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    The shifting range of NuVinci is smaller than a traditional set up but it allows for an unlimited clearance of the rear tire. The wheelskirts are a leftover from BoBike Junior Child Seat. Post a picture after you are done.

  35. #235
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    Fat Yuba in the house!!!!!

    I got my Fat Yuba done and am loving it! I got my Nuvinci laced up but am not using it because I found something better! Single Speed!!!! 32/22 I posted pics on the Fatbike forum. here is the link: Fat Yuba is IN THE HOUSE!!!!

  36. #236
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    Nuvinci Hub with 65mm rims

    What the heck happened to the Pictures on this website! They changed the way pics are uploaded again and now it sucks! Why cant a box open up that lets me choose pics from my computer? why does it have to be a stupid URL?

    Computers are stupid, I'm going to go ride my bike!!!!!
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  37. #237
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    failed attemp at posting photos

    Message Failure
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  38. #238
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    Hi, anyone has an idea why pictures I posted on 06082013 do not show up anymore? They were visible for about two month and now this site only gives a message Attached Thumbnails-

  39. #239
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    All my pictures are gone too. WTF!
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  40. #240
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    There is a sweet Yuba Mundo postsed on Ebay right now. It looks like it comes with all kinds of good stuff.
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  41. #241
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    Just checked it out :O Dang how can i make that much money ASAP LOL ?
    Finally rolling on 29" x 2.0" Schwalbe Big Apples

  42. #242
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    The Yuba Mundo Thread

    Finally got around to installing lighting I had purchased some months back. Seldom have the Mundo out after dark, but when I have I always cursed myself for not putting good light on it. That problem is now in the past.

    Power comes from a Nordlicht bottle dynamo. I like hub dynamos a lot, but the Mundo wants a HD front wheel, lots of fat spokes, etc. which adds more cost and sourcing hassle beyond what is usual when adding a hub dynamo.



    I fabricated a crude bracket from 1/8x1-1/2 Al. It mounts to the fork via two 5mm threaded braze ons Yuba conveniently put inside the left fork leg. I guess this might be for a torque arm on the electric assist version.

    I made a couple light bends in the bracket to roughly match the radius of the fork blade. A couple layers of road bike tire soak up the difference. I had thought I might need to tie into the brake stud above the bracket, but it feels plenty solid without the added complexity. The braze ons stand proud of the surface of the fork. It is important that the tire layers are thicker than the shoulders of the braze ons, and have clearance holes large enough to clear the braze ons.

    The headlamp is a Phillips Saferide. These are significantly better than the next best thing, and cheaper to boot. A pain to get, though, as Phillips doesn't import them to US.

    Another hunk of Al and a couple of P clips secure it to the front of the basket.



    No photos of the rear light. I am not real happy with how I mounted it. I can only claim that it works. Will update when I have done it decently.

    Seems to work well. The bottle does add just noticeable drag, but nowhere near what I recall of the cheap stuff I had as a kid. I can hear some whine, but it is not all that loud. The Phillips lamp gives plenty of light. Seriously, you owe it to yourself to give one of the lights a try.

  43. #243
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    Today I was transporting new tires using my Mundo, two pictures:
    The Yuba Mundo Thread-pneu1.jpg
    The Yuba Mundo Thread-pneu2.jpg

  44. #244
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    Sweet! Love it!

  45. #245
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    What is the widest tire you can run without modification and being able to use all gears on the V4 front and rear?

  46. #246
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    All I can tell is that Surly Endomorphe tire is too wide for a regular setup. 2.3" tires fitted just fine, fenders included.

  47. #247
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    I ran 2.5 hookworms with just a tiny bit of rub in the lowest gear.
    "... Say you coming and took you for a spin like a stolen, rusty cruiser, boy. Yeah, I'm talkin 'bout a HARSH ride. "

  48. #248
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    I have Yuba Mundo with the "one leg" kickstand. It does its work but there are some problems when I am loading heavier things. I have two 50 liter boxes on the bike and the best way to load them is to put the heaviest things to the center of the gravity of the bike. Thats theory. But when I load the left box, content slides to the right side (and away from the center of the gravity) and sometimes also the whole bike falls to the side (but only a few, because the box itself blocks it ). The content of the right box slides to the desired side (to the frame) but when I put into it too much, the whole bike tends to fall- and on this side there is no stand to block it from this. So the whole process of the bike loading seems much more like acrobacy than like normal cargo bike usage

    I am thinking about buying the Stand Alone Kickstand (Stand Alone Kickstand | Yuba Bicycles, Mundo Cargo Bike, Boda Boda Bike) which should grant horizontal position of the bottom of the boxes. One leg stand is rather stable when pressing the bike to the left side. Is it the same with the stand alone kickstand?

    I saw some video where a man stood on the sideloader and the bike was stable. Is it really so? I have a daughter which now knows that she can only go to the rear carrier from the left side (with no risk of the bike falling on her).

    What does the front wheel with the stability of the bike? Is it necessary to have some deflopilator to fix it in a stright position?

    Thanks for responses.

  49. #249
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    Quote Originally Posted by Jozo View Post
    I have Yuba Mundo with the "one leg" kickstand. It does its work but there are some problems when I am loading heavier things. I have two 50 liter boxes on the bike and the best way to load them is to put the heaviest things to the center of the gravity of the bike. Thats theory. But when I load the left box, content slides to the right side (and away from the center of the gravity) and sometimes also the whole bike falls to the side (but only a few, because the box itself blocks it ). The content of the right box slides to the desired side (to the frame) but when I put into it too much, the whole bike tends to fall- and on this side there is no stand to block it from this. So the whole process of the bike loading seems much more like acrobacy than like normal cargo bike usage

    I am thinking about buying the Stand Alone Kickstand (Stand Alone Kickstand | Yuba Bicycles, Mundo Cargo Bike, Boda Boda Bike) which should grant horizontal position of the bottom of the boxes. One leg stand is rather stable when pressing the bike to the left side. Is it the same with the stand alone kickstand?

    I saw some video where a man stood on the sideloader and the bike was stable. Is it really so? I have a daughter which now knows that she can only go to the rear carrier from the left side (with no risk of the bike falling on her).

    What does the front wheel with the stability of the bike? Is it necessary to have some deflopilator to fix it in a stright position?

    Thanks for responses.
    I'm happy with the stand alone kickstand, but you can still tip the bike over. When carrying two shipping pallets home, I'd have to lean the bike against a wall after putting one on, since it would tip the bike without the other. The deflopillator seems like its important. If the load is big, you don't want the strange instability that comes when your bars suddenly turn. I can't say for sure and you could figure out a way to keep the bars facing forward just while loading the bike for the same effect.

  50. #250
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    Get the StandAlone Kickstand. It definitely helps with loading. My kids are crawling all over the bike with it down. With most of the weight on the back, doesnt seem the deflopillator does much, but I have one anyway....

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