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  1. #51
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    Quote Originally Posted by TrailMaker View Post
    This is interesting;

    Laying down a contiguous "bed" for the actual weld to nest/fuse into. Very interesting. I had never considered this, but it makes perfect sense! As he suggests, even with exceptional miters (which are mandatory for this), you are stealing material from both tubes to create this fusion, and necessarily thinning them at a critical juncture. You can do this with some materials and in certain applications and get away with a fusion weld alone (I do it on stainless intercooler/intake hard pipes), but not in this case. It also occurs to me that this fusion step makes it much easier to get visually stunning (and structurally solid) final welds when it is time to add the filler.

    Thanks for letting that little trick slip out!
    exactly right on all counts but it also gives the joint some thermal stability when you go back to add filler, all but entirely preventing too big a keyhole opening thanks to too much heat.

    if you ever get an opportunity to cut up a bike, take it. Specifically, cut through an acute joint to see if there's a gap underneath the weld bead. Ideally, you won't see any air space at all between the two parent tubes. In a lot of cases though, you'll find that the filler rod "bridges" between them, leaving a triangular gap. With something as notch-sensitive as ti, that's bad news bears.
    Sean Chaney :: Owner/Builder :: Vertigo Cycles LLC
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  2. #52
    All Lefty's, all the time Moderator
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    Thanks for the info Sean, sexy lookin' rig you're building there!
    This is a Pugs not some carbon wannabee pretzel wagon!!

    - FrostyStruthers



    www.mendoncyclesmith.com

  3. #53
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    Quote Originally Posted by Drevil View Post
    Nothing but the finest for this steed:




    1. High-rise steel handlebar for strength
    2. Post Moderne seatpost 26.6mm (might need a shim for 30.9mm)
    3. Adjustable angle stem for easy adjustments in varying terrain
    4. Avocet bottle cages, powdercoated pink
    5. Scott AT-4 grips (made of real Kraton!)
    6. Jandd pink handlebar bag with WOMBATS patch for power pills and energy snacks
    7. Avid SD 2.0 cantilever brake levers
    8. Gorilla brake booster for awesome skids
    9. Cane Creek handlebar end grip extenders for aero tucks
    10. Forte Easy Rider saddle in case the 'roids flare up



    If Sean doesn't get the cantilever posts on the frame, I'll have to think of something else for #7 and #8.
    Haha! Nice! I'm old enough to remember the WOmens' Mountain Biking And Tea Society (WOMBATS). I may have some of that old gear in my box o' parts - probly the pink grips and the SD 2's.

  4. #54
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    really like the look of this fatbike. got any numbers of that geo? How short did you manage to get the chain stays?

  5. #55
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    Quote Originally Posted by Drevil View Post
    Smokin'!



    WOW! I cannot muster anything more!


  6. #56
    drev-il, not Dr. Evil!
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    Quote Originally Posted by Drevil View Post
    I haven't completely decided on the parts, but I like to tinker. I'll probably start with a Salsa Enabler fork (which fits the A-C of the design), but I'm also in the queue for Lefty clamps. It'll be dressed as a singlespeed or a gearie when the mood strikes.
    Since it's getting closer, I figured it was time to start gathering together the parts. Some of it recently purchased, some of it NOS, and some of it being stolen off other bikes:



    Have:
    • Fat Lefty Clamp (ala Mendon Cyclesmith)
    • Tires: Almost all of 'em
    • Spokes: double butted silver
    • Brake Levers: Paul or Avid Ultimate (haven't decided which to use)
    • Saddle: Specialized Phenom or WTB (undecided)
    • Grips: Oury (whichever matches the saddle)
    • Jones Ti Loop Bar
    • Thomson Stem
    • Eriksen 450mm 30.9 seatpost
    • Speedway Uma 50mm rim for rear
    • Avid Full Metal Jacket brake cables
    • Paul Shifter Mounts
    • Dura Ace Shifters
    • XTR Rear Derailleur
    • XTR Pedals
    • Middleburn 58/94 170mm crank
    • PC-951 Chain
    • Pink and silver streamers



    Haven't yet:
    • BB-7 Brakes, 160s both ends
    • Phil Wood Ti BB
    • Endless Kick-Ass-Cog/ XT Cassette
    • Some sort of direct mount front derailleur
    • Project 321 Lefty hub
    • Surly Large Marge Lite rim
    • Silver Reflective tape for rim holes


    If I do throw rigid into the mix, I'm thinking of getting a Carver O'Beast. It works with the fat front wheel I already use on my Jones (Paul Whub).
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  7. #57
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    i particularly like the tassels...one in either direction?

  8. #58
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    I see you are going with the dual-seat option, good choice.

    Looking forward to the build-up pics.

  9. #59
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    nice work!!

  10. #60
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    Quote Originally Posted by Rockin View Post
    I see you are going with the dual-seat option, good choice.

    Looking forward to the build-up pics.
    2 seats, 4 tires and half a fork...

  11. #61
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    that's a nice list of parts, Jones bar is supersweet!!!
    mount a lefty in the frame is awsome, do you have a technical drawing of those clamps for the lefty ??
    miesj

    create your own FAT path 2 succes, don't just follow others

  12. #62
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    Quote Originally Posted by SmooveP View Post
    2 seats, 4 tires and half a fork...
    hilarious

  13. #63
    drev-il, not Dr. Evil!
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    Quote Originally Posted by elgordo View Post
    hilarious
    You forgot the prior post. There'll be 3 seats, 2 bars, and 6 brake levers. This thing is gonna be outta control!
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  14. #64
    drev-il, not Dr. Evil!
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    Quote Originally Posted by miesj View Post
    that's a nice list of parts, Jones bar is supersweet!!!
    mount a lefty in the frame is awsome, do you have a technical drawing of those clamps for the lefty ??
    No sir. Hit up Mendon C to the S for the numbers.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  15. #65
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    I'm still curious how you're going to keep those tassels attached to your nipples for an entire ride.
    Sean Chaney :: Owner/Builder :: Vertigo Cycles LLC
    flickr :: www.vertigocycles.com

  16. #66
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    Different rims front and rear...? Why...?

  17. #67
    drev-il, not Dr. Evil!
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    Because Lefty is offset, and the Marge Lite has an offset spoke bed, is relatively light, and is available now. Why not the same on the back? Because I bought it a little ways back, plus I already know it works well for me.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  18. #68
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    Quote Originally Posted by smudge View Post
    I'm still curious how you're going to keep those tassels attached to your nipples for an entire ride.
    With nipple clamps, of course.
    (Sorry, no pics - you'll have to look that up for yourselves.)

  19. #69
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    Quote Originally Posted by Drevil View Post
    Because Lefty is offset, and the Marge Lite has an offset spoke bed, is relatively light, and is available now. Why not the same on the back? Because I bought it a little ways back, plus I already know it works well for me.
    I've just put together a lefty wheel with a 80mm GFS, with non-offset drilling. Theres a fair amount of tension on the right side, with a notable amount less on the left side. But IMHO these tensions are fine. With a BFL mounted (at 18 PSI), the disc mounts of the hub, are 1-2 mm from the floor when laid flat. So I'm not sure you actually need an offset rim to make this work. In fact when I get my Lefty, I fully expect to be able to losen the right nips half a turn, while tensioning the left by the same.

    Also the project 321 hub is a lovely component. So well made.
    A big boy did it, and ran away.
    62*28'

  20. #70
    drev-il, not Dr. Evil!
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    "Direct" from Sean:

    A slightly augmented Direct mount standoff

    Make it work, then make it pretty.


    The standoff wasn't long enough to work with a 100mm shell with a +5mm offset for the rings so...
    machined a sleeve to a light press fit, welded around the circumference, turned the weld into a taper, mitered for extra tire clearance, cut a hunk out of a scrap tube, shaped and then fusion welded. Then the weld cap was filed down to make it look as if it were machined from a solid bar.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  21. #71
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    Quote Originally Posted by Drevil View Post


    "Direct" from Sean:

    A slightly augmented Direct mount standoff

    Make it work, then make it pretty.


    The standoff wasn't long enough to work with a 100mm shell with a +5mm offset for the rings so...
    machined a sleeve to a light press fit, welded around the circumference, turned the weld into a taper, mitered for extra tire clearance, cut a hunk out of a scrap tube, shaped and then fusion welded. Then the weld cap was filed down to make it look as if it were machined from a solid bar.
    Hoe Lee Cow. That is a pretty part. Function over form always works for this architect!
    Try this: HTFU

  22. #72
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    i didnt fully clock that you were getting front gearage on this beast til i saw these pics...thats super cool...short fat and shifty!//// impressive space management..!

  23. #73
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    Subscribed.

    Sorry I missed this one for so long. Nice bike Drevil.
    Quote Originally Posted by buddhak
    And I thought I had a bike obsession. You are at once tragic and awesome.

  24. #74
    drev-il, not Dr. Evil!
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    Quote Originally Posted by dRjOn View Post
    i didnt fully clock that you were getting front gearage on this beast til i saw these pics...thats super cool...short fat and shifty!//// impressive space management..!
    After 10 years of almost exclusively riding rigid singlespeeds, I wanted a change. Besides, I have enough fine examples of them.

    The sliding drops are insurance, just in case.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  25. #75
    drev-il, not Dr. Evil!
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    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  26. #76
    Full Tilt Boogie
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    The epitome of a custom bike. Simply gorgeous.
    I sell bikes here. Check out the Blog here. Facebook.

  27. #77
    drev-il, not Dr. Evil!
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    Mmmmmmkay...

    We're gonna skip a few steps and go straight to where it is sitting in my dining room. I don't have all the parts yet, but I have some parts that will proxy until I decide exactly what I want. Plus, I have to build a rear wheel. Hopefully I got the right size spokes

    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  28. #78
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    Quote Originally Posted by Drevil View Post

    Wow!
    Quote Originally Posted by buddhak
    And I thought I had a bike obsession. You are at once tragic and awesome.

  29. #79
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    hmmm? why is the ST bent??????
    LOL, looks real nice like!

  30. #80
    drev-il, not Dr. Evil!
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    Quote Originally Posted by osty View Post
    hmmm? why is the ST bent??????
    LOL, looks real nice like!
    Layback, son!
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  31. #81
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    outstanding...

  32. #82
    A Surly Maverick
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    "........................" (speechless)
    A Fatback'd Lefty for who life IS a Beach

  33. #83
    drev-il, not Dr. Evil!
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    At midnight I decided I wasn't going to be able to sleep with a brand new frame sitting downstairs. Got up, and gathered parts I needed to start building the rear wheel. After lacing a side...OY! The 170mm rear hub doesn't fit into my Park TS-2 truing stand. ARRRRGGGGHHHH. After a few minutes of trying to figure out how to make it work, I came up with this solution:



    Yup, I used a mini-tripod for my P&S velcro-d to the chainstay. Seems like this could come in handy on a ride

    Anyways, after 5 more hours of tinkering, I come up with this:



    Long night into morning. I haven't taken it outside yet to give it a whirl. This is gonna be rough Easter mass and brunch in a couple of hours because of the exhaustion and the anticipation.

    You'll probably see parts swapped on and off. I tinker a bit.

    16.5" chainstays with the current gear ratio, with a little room to go even shorter
    Last edited by Drevil; 04-08-2012 at 02:48 AM.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  34. #84
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    That's what I call a sleepless night well spent. Funny how bike frame's and parts is stronger than caffeine.


    Quote Originally Posted by Drevil View Post
    At midnight I decided I wasn't going to be able to sleep with a brand new frame sitting downstairs.

    Anyways, after 5 more hours of tinkering, I come up with this:



    Long night into morning. I haven't taken it outside yet to give it a whirl. This is gonna be rough Easter mass and brunch in a couple of hours because of the exhaustion and the anticipation.

    You'll probably see parts swapped on and off. I tinker a bit.

    16.5" chainstays with the current gear ratio, with a little room to go even shorter
    Lucky neighbor of Maryland's Patapsco Valley State Park, 39.23,-76.76 Flickr

  35. #85
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    Quote Originally Posted by Drevil View Post
    At midnight I decided I wasn't going to be able to sleep with a brand new frame sitting downstairs. Got up, and gathered parts I needed to start building the rear wheel. After lacing a side...OY! The 170mm rear hub doesn't fit into my Park TS-2 truing stand. ARRRRGGGGHHHH. After a few minutes of trying to figure out how to make it work, I came up with this solution:



    Yup, I used a mini-tripod for my P&S velcro-d to the chainstay. Seems like this could come in handy on a ride

    Anyways, after 5 more hours of tinkering, I come up with this:


    Long night into morning. I haven't taken it outside yet to give it a whirl. This is gonna be rough Easter mass and brunch in a couple of hours because of the exhaustion and the anticipation.

    You'll probably see parts swapped on and off. I tinker a bit.

    16.5" chainstays with the current gear ratio, with a little room to go even shorter

    Looks great Drevil! Enjoy the maiden ride!

  36. #86
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    That is one hell of a seatpost! It's like you put fat tires and a seat on a trials bike. How long is that post??

  37. #87
    drev-il, not Dr. Evil!
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    Quote Originally Posted by willapajames View Post
    That is one hell of a seatpost! It's like you put fat tires and a seat on a trials bike. How long is that post??
    It's an Eriksen 30.9 custom length of 450. Straight top tube straight into the seatstays coupled with long seatposts have always been über sexy to me.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  38. #88
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    Finally! Very hot... congrats.

  39. #89
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    Quote Originally Posted by Drevil View Post
    Straight top tube straight into the seatstays coupled with long seatposts have always been über sexy to me.
    I share your sentiment!


  40. #90
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    Quote Originally Posted by Drevil View Post


    Just swap an itty bity post on for Trials fun!
    Quote Originally Posted by buddhak
    And I thought I had a bike obsession. You are at once tragic and awesome.

  41. #91
    drev-il, not Dr. Evil!
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    A few shots from today's ride at Fountainhead in northern Virginia.












    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  42. #92
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    the coolest fat tyred bike ive ever seen. love it.

  43. #93
    All Lefty's, all the time Moderator
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    Wowsers!!!

    That looks awesome Ricky. Looks like a big old happy smile on your face too, nice work.

    Ride report???
    This is a Pugs not some carbon wannabee pretzel wagon!!

    - FrostyStruthers



    www.mendoncyclesmith.com

  44. #94
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    WOW!
    thats all..

  45. #95
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    Very nice.

    Must be really light - the wheels don't seem to touch the ground much...
    As little bike as possible, as silent as possible.
    Latitude: 57º36' Highlands, Scotland

  46. #96
    drev-il, not Dr. Evil!
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    Quote Originally Posted by Velobike View Post
    Very nice.

    Must be really light - the wheels don't seem to touch the ground much...
    Ha! I guess if you consider 29.78 pounds light (including chain lube!)

    Third ride tonight. One tough crash while racing my 9-year old nephew and me catching a pedal on a hidden rock at a peppy pace. Some of my parts still smart. Otherwise, very fun to boost.



    The rides have been mellow so far. Next ride is a 13 hour race on Saturday. Luckily I'm on a team, and I'm perfectly content with going at my own happy pace.
    "Keep your burgers lean and your tires fat." -h.d. | ssoft | flickr

  47. #97
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    Quote Originally Posted by Drevil View Post
    ...very fun to boost.
    One of my favorite Fat traits...man, you can get some serious pop off of stuff!


  48. #98
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    Nice bike.

    I like the long post. Looks kind of old school ala Cunningham Bradbury plus should provide for a bit more flex / cush than a short one.

    How are the brakes working out for you? I noticed it took a lot more brake force to stop when I built up my fat bike. I have a 203 front and 160 rear with 1st generation Saint brakes ( which aren't as strong as new Saints ). I'd like to switch out to a 180mm rear as it takes a fair amount of pressure to lock up the rear tire.

    I've been moving to bigger rotors as a rule the last year. 180 front and 160 rear on lighter bikes and 203 front 180 rear on heavier bikes. It makes life easier. But there is a balance. I had a 203 on the front of my 3 speed and it was too grabby so I went with a 180 which is better.

    I'd even like to try 224mm F 203mm R on the DH 29er project.

  49. #99
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    Quote Originally Posted by modifier View Post
    Nice bike.


    I'd even like to try 224mm F 203mm R on the DH 29er project.
    My god ... what are you trying to stop a tractor trailer?

    Joking aside, I found 160 F& R way to weak for fat wheels. I'm running 180 F&R and its great. Maybe a bit more in the front like a new SLX/XT/XTR hydro and 180 rotor!

  50. #100
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    Quote Originally Posted by elgordo View Post
    My god ... what are you trying to stop a tractor trailer?
    Almost 8" travel front and back and 2.5 meaty 29er tires on 44mm rims. That all adds up to some speed, traction and leverage on them little brakes.

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