Installing A 29er Fork On A 26" Bike

Discussion in 'Bicycle Repair' started by 5-7HEAVEN, Apr 23, 2011.

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  1. 5-7HEAVEN

    5-7HEAVEN Guest

    Anyone done this before?
    Any disadvantages to doing this?
    When I installed my Tanaka three-piece pipe on my center-mounted engine, I had to run the pipe forward for leg clearance. The fat chamber was less than 2" above the front tire, but turning radius was unaffected. Although strictly for on-road, if I hit a pothole or jump a curb, the tire would probably contact the expansion pipe and damage it.
    I have a spare 29" ROCKSHOX Dart 3 suspension fork for another project. I installed it for trial-fit and everything looks good. There is 4.25"(108 mm) clearance from the 26" tire to the pipe. This shock has100mm rebound, which should clear the tire if I bottom out the fork.
    Before I cut the stem, are there any disadvantages to installing a 29er fork on a 26" mountain bike? It might look odd, but that doesn't bother me one bit.
    I'll measure maximum rebound when I jump the curb. If there's lots of clearance, I might install a 29" front wheel to absorb more road shock.

    Last edited by a moderator: Apr 23, 2011

  2. 5-7HEAVEN

    5-7HEAVEN Guest

    The local bike shop owner said it's not a problem using a 29er fork on a 26" bike. He said the bike will sit higher in the front. I had him cut the stem to length and install the star nut. I installed the fork, but forgot the cap and star bolt at the shop. Everything else bolted in place with no issues, including the 26" wheel.
  3. Richard H.

    Richard H. Member

    The front will sit higher and it'll probably add a tad more weight but 29er is just another way of saying wide 700c wheels so I don't think you'll inherit any real problems.

    Hmmm, I am curious though why you think the change out of of wheel size would absorb more 'road shock'?
    Last edited: Apr 23, 2011
  4. darwin

    darwin Well-Known Member

    My new build is a diamondback hybrid w/700c wheels and it definately has a different feel to the ride vs 26in. Jurys still out but so far I like it, hard to explain but it just feels more responsive and faster. Reminds me of riding my 10 speed back in the 70s.
  5. DuctTapedGoat

    DuctTapedGoat Active Member

    Do be careful - shocks on a stock rigid frame can bring issues, you should be able to dodge any of those worries by using the larger forks, but still, be careful.
  6. 5-7HEAVEN

    5-7HEAVEN Guest

    Hi Richard. Actually, the new ROCKSHOX is measurably lighter than the OEM Diamondback suspension fork. I have read that the larger wheels and tires absorb road shock better than 26" wheels. We'll see.

    Last edited by a moderator: Apr 24, 2011
  7. DuctTapedGoat

    DuctTapedGoat Active Member

    Ah, good! Shouldn't have any issues at all then.
  8. Porkchop

    Porkchop Member

    Don’t mean to change the subject on Heaven’s post, but can you explain this ? My Schwinn hybrid came with front shock, nothing on back and with spring loaded seat post. I have ridden bikes with shocks on front and rear and don’t particularly like them. Just curious. Thanks !
  9. Richard H.

    Richard H. Member

    Yeah, I'd like to hear this one too.
  10. Porkchop

    Porkchop Member

    To be a little more specific, I love having a front shock, but with both front and rear, the bikes I rode just felt to mushie and out of control to me. Full suspension might be an advantage for off road/mountain bikes, but I don't like them on a pavement pounder. Might be because I've never ridden one enough to get used to it. 5-7, hope I'm not out of bounds here on your post, but I think the suspension issue is to your and the rest of our advantages. Let me know if I/we need to take this discussion elsewhere.
    Thanks !
  11. DuctTapedGoat

    DuctTapedGoat Active Member

    What are you curious about?
    Last edited by a moderator: Dec 15, 2015
  12. Porkchop

    Porkchop Member

    Why is a front shock bad on a rigid frame ? There are bunches of that configuration being produced in todays market. you don't see many road bikes with dual suspension.
  13. DuctTapedGoat

    DuctTapedGoat Active Member

    If at full stock it had no shocks at all.

    If your bike had no shocks at all and was entirely rigid, it's designed to have the headset at a certain height, and the gooseneck at a certain angle.

    When you put front shocks on a bike that wasn't built for them, your front end can dip down too much and flip you over the bars due to the headset lowering and your gooseneck coming near close to vertical, if not surpassing that point.

    A springer front end is far different, it flexes instead of going immediately down. You can put a springer on near anything it can fit into.

    The reason he is out of the woods from danger is that he's going with larger forks, which should keep when the shocks are depressed everything at near it's original design, and when not depressed, it will be above it's original design.
  14. retromike3

    retromike3 Member

    longer fork, depends

    there are several changes to the geometry of the bike frame that can be successfully done and not make the bike unrideable. The main problem I see it if you use to long of a front fork it might raise your bottom bracket to high and make the bike unstable. The effect would be every time you went to make a turn the bike would "dive" and not track very well.

    I had this problem with my current motor bicycle. I had a front shock fork that I got when I replaced a friends front fork. I tried to install it and it made my unstable, but I replaced it with a rigid 700c cross bike fork that I had lying around. It was longer than the stock rigid fork that came with the bike but still short enough to keep the bike within specks. The bike has tracked grate and is very stable and responsive. I did have to weld cantilever studs on the "new" fork so that the V-brake clones would work though.


    Attached Files:

  15. 5-7HEAVEN

    5-7HEAVEN Guest

    No harm, no foul, my friend.:grin5:
  16. Porkchop

    Porkchop Member

    I knew you were a good sport !
    Thanks !