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  1. #1
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    650B frame with 26 wheels?

    All want to convert 26 to 650b, but can't find any posts regarding 26 on a 650B frame.
    Since 275 and 26 are close, would like to know if anyone tried, and if so, what they felt?
    thnkx

  2. #2
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    Why would you want to? I guess if you brought a frame and had to save money to get the wheels. But otherwise you might as well just keep the 26" frame.

  3. #3
    NedwannaB
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    Quote Originally Posted by Tkul View Post
    All want to convert 26 to 650b, but can't find any posts regarding 26 on a 650B frame.
    Since 275 and 26 are close, would like to know if anyone tried, and if so, what they felt?
    thnkx
    You're pulling our leg......
    Wait whuuut, who did he tell you that!?!?....

  4. #4
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    I could see doing this in very specific instances:

    - As a kid outgrows a 24" frame but isn't quite ready for a full 26" bike, it is not uncommon to use the 24" wheels on the 26" frame for up to a year.
    - You may have a set of tires that are fantastic for a particular season (rainy, snow, whatever) and want to be able to run those for that season but others the rest of the year.

    And yes, it can certainly be done. Considerations are mainly about lowering the BB height. There should be no clearance issues.

    Fred

  5. #5
    gravity fighter
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    Quote Originally Posted by Tkul View Post
    All want to convert 26 to 650b, but can't find any posts regarding 26 on a 650B frame.
    Since 275 and 26 are close, would like to know if anyone tried, and if so, what they felt?
    thnkx
    I would imagine they felt a lot of pedal strikes.

  6. #6
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    it wasn't my idea to get wiped around with this question...
    I thought about BB height being a problem, but...
    DEMO has BB height (on low setting) 338mm.
    Norco Range 650B - 344mm (less travel than Demo)
    Radius of 650 tire is aorund 15mm (???) - and the Norco on a meaty 26 tires, BB height would be around: 330mm

    as far as I understood, no one tried.
    thanks anyway!.

  7. #7
    gravity fighter
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    What are you trying to accomplish? I'm sure you can, but why would you want to?

  8. #8
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    I was going to try this but my Burner has a 15mm fork and 142 rear and my 26 wheels are all 20 and 135.

    Not sure why the comparison between a Demo and Range though. I'm on a proto Burner with 320mm BB, and I ride a 08 DHR with a 350mm BB, I have way more pedal strikes on the DHR

  9. #9
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    The question of running 650's on a 29" frame has come up - too low BB height, long chainstays. So along those same lines 26's on a 650 frame will also have a low BB and longer stays = zero benefit plus most 650b specific frames are not cheap. Its like saying lets put 14" rims on a Hummer ???

  10. #10
    NedwannaB
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    Quote Originally Posted by Mikecito View Post
    I would imagine they felt a lot of pedal strikes.
    Devils advicate, I guess you could put shorter armed crankset on it to compensate. But then again, why?....
    Wait whuuut, who did he tell you that!?!?....

  11. #11
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    1st I would like to highlight I m not masochist and asked has curiosity, since I couldn't nfind any info. I could stay quiet and not posting, but since I'm a curious person, I decided to post knowing that a) no one would answer, b) be answer like a troll or c) questioning my reasoning.
    Why do it? Maybe to experiment. Bb drop on 650b is normallybigger than 26 and since 26 are smaller your cg would drop by almost 20mm compared with a "normal" 26.

    Ive placed the demo nb drop, just to highlight that although bb drop could be an issue, on the demo, you can have a low bb, with big travel on the back, and don't see people complaining about that.

    It's not a question of why, but more a question- "i tried and for me is......"
    If I had, I would tried it, and wouldn't be a question of "buying a specific fork and frame, and not having money for the wheels"

    Sorry for taking your time! Thnks


    Ps: just like this yeli with 650. Why? Why not?(X-post) Yelli Screamy 650 B?

  12. #12
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    Tkul, I'm with you. Wanted to try it but not bad enough to deal with the hub fit, still may try some day with my Lyric up front. Got to say that the very low bb on my bike isn't giving me any issues and the motivation to run 26's is tires and fork.

    I think this forum is a little sensitive because it's winter and they are all getting impatient for the cool new 27.5 stuff.

  13. #13
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    Why not use 27.5er wheels?

  14. #14
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    Use 27.5- yes, if it was design for it, why shouldn't you, right?
    Experiment 26 - why not?

    Don´t take me wrong, my idea was only to know how it would feel a 275 with 26.

    It's not having an idea / "commitment" of using 26 on 275 frames & forks.

    Like the idea of having 275 on 29ers. It seems it suits some. Would I use like that? Sincerely it really doesn't interest - Really!

    Let's say that would be an experiment "in name of MTB science!"

  15. #15
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    I've been thinking about this concept with 27.5 wheels on a frame designed for 29?

    The reasoning behind it is that no-one makes a carbon 29er that supports 140mm front fork.

    You might say "why not buy a chinese 27.5 and put a longer fork on it?" Because those bikes are designed for 100mm forks. Sagged, at that. A 140mm fork would raise the BB on 27.5 bike an inch, along with the chopper look.

    I believe such an odd build would probably still result in a slightly lower than stock bottom bracket, but that may not be a bad thing on a bike that has a higher-than-average stock bottom bracket height.

    The only thing I'd worry about is the strength of the frame. The angles would change considerably, maybe outside those limits it was designed for.

    You'd also have long chainstays, which could provide amble clearance for larger tires, or could have lots of empty space.

    I'm not saying I'm going to do it, but we're bench building here, so this is my thought.
    GIS/GPS Pro using ArcFM for Utility Mapping - Always willing to connect with other MTBers in the industry.

  16. #16
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    If some one tried I want to know because Im looking in to a khs sixfixty 300 but Im not going to buy it until I know because I have a set of 26wheels with road tires that I would use when I go to the street or around the neighbor hood

  17. #17
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    Quote Originally Posted by lucasoildavid View Post
    If some one tried I want to know because Im looking in to a khs sixfixty 300 but Im not going to buy it until I know because I have a set of 26wheels with road tires that I would use when I go to the street or around the neighbor hood
    26" with road tires would make your bottom bracket way too low. If anything, you'd want to go the other direction-26" frame/trail tires with 650b road wheels/tires. If you want to run 650b on the trail, put 29"/700c wheels on for road use. That would keep your geometry pretty constant.

  18. #18
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    Another thing to remember is that because you're switching to a smaller wheel, you'll have less mechanical trail. That will make it feel as if your HTA is steeper, and the bike may feel less stable or more "twitchy" than it would for the wheel it was designed around. The effect is probably pretty small, but it's worth mentioning.

    Also, on these forums, there are a number of people who have ridden a 650b in front and a 26" in rear, either because their frame couldn't accommodate the bigger wheel in back, or to slacken the bike out. There are no problems with that setup on a 26" frame (assuming the fork clears). I'd imagine the same would be said for running a 26" in the rear of a 650b frame with a 650b up front.

  19. #19
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    Quote Originally Posted by SteveF View Post
    26" with road tires would make your bottom bracket way too low.
    He may mean something with a large volume, like a Maxxis Hookworm. Assuming he means something like a 26x1.5, though, you're dead on.

  20. #20
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    Good call on 700c.
    Wait whuuut, who did he tell you that!?!?....

  21. #21
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    Even a big 26" slick would lower the BB by at least 1/2 inch, though, I would estimate. Maybe not a problem for road use.

  22. #22
    NedwannaB
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    Yeah one of my first ventures over into the conversion world was with a set of disc CX wheels and 32-35c tires on my 26" hardtails. It was only after getting a couple 45c FireXC Pro's that wouldn't fit that I decided to get a real 29r frame for those wheels. But by then I had 650 wheels for the ht and a 26" fs frame.
    Wait whuuut, who did he tell you that!?!?....

  23. #23
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    I rode my Ventana a couple months with 26 while waiting for a wheelset I want to come out. It rode ok with no issues but its rides alot better since I got 650b wheels on it.
    09 Ventana El Bastardo 650b
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  24. #24
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    I had the same question and glad I searched.

    I'm considering the bronson but I have a brand new 26" wheelset that I'd like to use for a while (until I can save up for a 650b wheelset).

  25. #25
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    I have some 26"x1" slicks that I sometimes throw on in the summer just for kicks, and there are no worries about BB height, only traction occasionally. But they are super fun, super fast on the trails, but you have to treat them like sniper rifles as opposed to 2.1" shotguns.

  26. #26
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    Quote Originally Posted by lazarus2405 View Post
    He may mean something with a large volume, like a Maxxis Hookworm. Assuming he means something like a 26x1.5, though, you're dead on.
    I put 26x1" slicks on my mountain bike sometimes in the summer and it's actually really fun for fire-roads and not too crazy singletrack, picking good lines and occasional climbing traction is the toughest part, lower bb just makes it corner better for the most part.

  27. #27
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    Idea!

    This will be useful to people who purchased a bike, believing the "experts" who told them to completely ignore standover, and found out that it really does matter after all.

    There will likely be renewed interest in putting 26" wheels on 650B frames as the supply of rideable 26ers dries up. Expect this thread to be revived in a couple of years.

  28. #28
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    I'm searching this topic as well. Need a replacement frame for my 26" hardtail, but If I'm going to drop $500+ on a frame, I'd almost rather move in the direction of a 650b build as I can afford it, not all at once. Keep in mind that the size 27.5" is misleading, in that the wheels are actually much closer in size to 26" than 29", rather than right in the middle like many seem to think:
    Trail Tech: Cutting through the 27.5 wheel size hype - BikeRadar
    Hence why many are running 27.5 in 26" frames and forks... In fact I know someone who is using a 26" fork on his Ibis 27.5 Mojo enduro bike. The bottom bracket of a given 650b frame will drop about 1/2" with 26" wheels, less difference than some frame variations within the the same wheel size (There is almost 1" difference between my Giant and my Yeti, both 26"). Add a longer fork and the height goes back up...

    I'm just hoping to find someone who has actually experimented with this for real-world riding before I start spending money. One could also adjust the diameter some by running larger tires, easily reclaiming 1/4"-1/2", depending on the tire sizes compared (ie: a 27.5x2.1 will be about the same as a 26x2.5).
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  29. #29
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    Go 26+ tires? What are the larger sizes available?
    '10 Marin MountVision 650b conversion

  30. #30
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    26" wheels on a 650b frame is going to be the hot setup for 2015. Just you wait.

  31. #31
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    26" on 27.5" frame in the flesh

    Here you go...

    I ordered the frame first, but had to wait on fork/wheels for another week since they were slower to arrive. Obviously I wanted to ride the new frame right away, so I just moved parts over and tadaaa.... This happened.


    I lost about 2cm of pedal clearance and definitely noticed a greater number of pedals strikes, but it didn't take long to get used to it - handling was comparable but obviously nicer with the larger wheel. Aside from the horrid steerer tube sticking out, I didn't really notice it at all visually until I built the bike up proper. I'd say it's "doable, but you might as well get the right equipment."


    Beef

    (for reference, I was coming from a Kona Kula Primo with similar sizing)
    Attached Thumbnails Attached Thumbnails 650B frame with 26 wheels?-img_20150302_150614.jpg  

    650B frame with 26 wheels?-img_20150303_123833.jpg  


  32. #32
    Axe
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    With 3" wide tires on 40mm rims, that may be quite a nice ride. Baby-fat.

  33. #33
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    Quote Originally Posted by turbodog View Post
    26" wheels on a 650b frame is going to be the hot setup for 2015. Just you wait.
    Yeah, but only on frames with clearance for 2.8"+ tyres...

  34. #34
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    This place is full of sheep.


    Here's my 160mm travel norco range that I've run 26" wheels and fork on since I bought it last summer.



    It rails. It has stronger, stiffer, faster accelerating wheels and a 12.7" BB which is only a problem if you suck at using your eyes. Quit looking at your GPS and pay attention to what you're riding on, and you can do it too. I've even had explody plastic cranks on it the whole time that still have zero marks on them.

    The stability of this thing pile driving into big rocks is awesome.

    Why do it? Because bikes are too high, and the industry sucks but this is an awesome side effect of them trying to convince you that you need new stuff.

    I've learned to live the massively long 16.8" chainstays that are somehow okay with 27.5" wheels but somehow become too long with 26s.

    I also did the same thing with a nomad3 when I was bike shopping right before buying this one. No one died and I went up and down mountains just like I always have.

    The thing to keep in mind is that you're going to drop more than just a wheel radius difference doing it with a 26" fork since the fork will be a little shorter too. In both cases the bikes dropped about 0.7 inches. You can do it with a 27.5 fork but it might make the front end a little more twitchy with the greater axle offset.
    STRAVA: Enabling dorks everywhere to get trails shut down........ all for the sake of a race on the internet.

  35. #35
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    Quote Originally Posted by Tkul View Post
    All want to convert 26 to 650b, but can't find any posts regarding 26 on a 650B frame.
    Since 275 and 26 are close, would like to know if anyone tried, and if so, what they felt?
    thnkx
    Tried it? I'm still riding it. I cracked my old 26er frame, got it warrantied, and built it up with the parts I had. My bottom bracket is hella low; tons of pedal strikes. I don't recommend this setup to any one. The good news is my new wheels should be here soon.

  36. #36
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    I rode an Instigator 2.0 as a 26 bike and it was fine- a bit low in the BB area but not a big deal just adjusted timing. Converted over to 27.5 for the stiffness of a taper steer tube and 15mm axle fork and the wheelset got updated accordingly (score one for the bike industry) and the bike feels a bit more at home with the bigger wheels but not so much that I could never go back in a pinch.
    I guarantee I will never, ever be accused of bringing sexy back...

  37. #37
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    Quote Originally Posted by kidwoo View Post
    This place is full of sheep.


    Here's my 160mm travel norco range that I've run 26" wheels and fork on since I bought it last summer.



    It rails. It has stronger, stiffer, faster accelerating wheels and a 12.7" BB which is only a problem if you suck at using your eyes. Quit looking at your GPS and pay attention to what you're riding on, and you can do it too. I've even had explody plastic cranks on it the whole time that still have zero marks on them.

    The stability of this thing pile driving into big rocks is awesome.

    Why do it? Because bikes are too high, and the industry sucks but this is an awesome side effect of them trying to convince you that you need new stuff.

    I've learned to live the massively long 16.8" chainstays that are somehow okay with 27.5" wheels but somehow become too long with 26s.

    I also did the same thing with a nomad3 when I was bike shopping right before buying this one. No one died and I went up and down mountains just like I always have.

    The thing to keep in mind is that you're going to drop more than just a wheel radius difference doing it with a 26" fork since the fork will be a little shorter too. In both cases the bikes dropped about 0.7 inches. You can do it with a 27.5 fork but it might make the front end a little more twitchy with the greater axle offset.
    Read through this thread looking for a logical post, and here it is. ^

  38. #38
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    Really? Seems pretty heavily biased and opinionated to me.


    Just a note: The nomad I did this with ended up with a 12.4-12.6" BB depending on tires. With the way that bike moves through it's travel (IE very easily), I thought that was a little low. The Norco not so much, but again more because of the leverage rate of the rear end, not just the measurement. I've liked them both descending but I was literally dragging my feet on the nomad a lot more often on climbs. Not hitting, just 'brushing'

    The guerilla gravity megatrail sits at 12.7" in its supergravity mode as designed and everyone seems to love it. With higher BB bikes like the YT capra, Trek Slash, and cannondale jekyl, I think there are plenty of good canditates out there. I think the advent of 650b wheels is the silliest thing the industry has ever done (and that's saying something). But it's produced a sweet option for anyone wanting lower bikes. I'm all about 650b frames.
    STRAVA: Enabling dorks everywhere to get trails shut down........ all for the sake of a race on the internet.

  39. #39
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    Quote Originally Posted by kidwoo View Post
    This place is full of sheep.


    Here's my 160mm travel norco range that I've run 26" wheels and fork on since I bought it last summer.



    It rails. It has stronger, stiffer, faster accelerating wheels and a 12.7" BB which is only a problem if you suck at using your eyes. Quit looking at your GPS and pay attention to what you're riding on, and you can do it too. I've even had explody plastic cranks on it the whole time that still ......
    Awesome, thank you for the answer;
    So, here is the deal:

    1. previously I use to ride 26 inch bikes and feel f**ing comfortable
    2. last season I bough first full suspension bike (Norco Range) with 27 wheel, from my observations, those wheels are huge and I do not like starting speed and lack of agility in the air.
    3. Norco has nice short CS, shorter that some 26 bikes, that's why swapping frame for 26 inch is not the case,
    4. personally I interested in buying / nice set of 26 wheels for the bike-park riding.
    4. by the way, norco frame is awesome, and I do not thing I would find good alternative

    27 wheel are ok if you have lot's of climbing, ig you descending and jumping, jumping jumping, 26 are far better.

  40. #40
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    650B frame with 26 wheels?

    Ok so here's my question: I currently have 3 bikes. An old Ellsworth Truth 26er I've ridden forever, a Trek Fuel Ex 9.8 in 650b, and a Trek Superfly hard tail 29er I bought for racing in central Oregon where the trails are typically pretty hard pack and smooth. My question is about running my 650b wheels on the superfly to make it a 650b hard tail. I've found that after so long on 26ers the transition to a 27.5 was seamless but I have to really work at steering the 29er wagon wheels around in tight technical trails. So besides a somewhat lower BB and the possibility of pedal strikes is there a reason I shouldn't give it a go just to see if the handling is better because of the smaller wheels or if the 29er geometry makes it harder to hustle in the tight stuff...What do you guys think?


    Sent from my iPad using Tapatalk

  41. #41
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    If you have the wheels it can't hurt to try just for fun, but there are at least a couple of things to consider:
    1) It's not just the wheels that tend to make a 29er stubborn and awkward to handle, but the geometry required to make the big wheels work tends to be pretty sketchy too (those head angles!).
    2) There is a lot of overlap between 650b and 26" frame geometry, in fact many are pretty much the same, so the wheels can often be interchangeable and still work. 29ers don't have that overlap, in fact just about everything about them is different, and probably the biggest issue will be BB height (pedal strike). The difference in size between 26 and 27.5 wheels isn't as great as the difference between 27.5 and 29, which is why the frames are so different.
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  42. #42
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    Generally I think 29ers have a longer wheelbase which might be what you are feeling, but it won't change the geometry so you might as well try it.

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