29er forks more likely to snap than 26 inch forks?- Mtbr.com
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  1. #1
    Alastair78
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    29er forks more likely to snap than 26 inch forks?

    I am looking at bikes with Fox 26 inch and 29 inch forks. Both seem identical & both have 32mm stanchions. It seems to me however, that having a 29 inch fork would put more leverage on the usual snapping point (just below the crown).

    Any thoughts on this? The only thing I can think of is that perhaps the 29er forks have thicker walls.... but somehow I doubt it.

  2. #2
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    Why do you feel you would snap either?
    There are far more delicate parts of a bike to worry about.

  3. #3
    Alastair78
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    Quote Originally Posted by thickfog View Post
    Why do you feel you would snap either?
    There are far more delicate parts of a bike to worry about.
    I am 100kg (220 pounds). Also I have seen a few snapped forks in the same place, inlcuding fox (older ones though)... Still a chance when the rider weighs more.

  4. #4
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    it depends on how you use the bike,if fork snapage is a concern of your's (you know how you ride) then maybe the 29er thing is not for you,If you land hard enough to possibly snap forks the 29 inch wheels are not gonna be happy either.I stayed with 26 inch wheels because of this.

  5. #5
    ballbuster
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    I haven't seen an snapped fork in 9 years, except for some cheap chinese made titanium rigid forks that broke at the faulty welds from the legs to the crown. Titanium takes some real skill to weld correctly, and I guess the mfg didn't get it hot enough.

    I don't think it's a real concern, as long as you're using a fork within its designed use limits... that, is, you aren't doing 20 foot drops to flat on an XC fork, or land splayed on the top of a jump, pulling the wheels apart.

    Plus, when suspension forks break, they usually break at the steerer tube, right at the crown race. I think you are more likely to crack off your head tube under that much stress.

    BTW, I'm 215 (was 220) and have been mostly riding Rebas (light-ish XC forks) for the last 7 years.... until I got a Lefty!

    <a href="https://picasaweb.google.com/lh/photo/yTF1CC17qrHKo033GcQd6w?feat=embedwebsite"><img src="https://lh3.googleusercontent.com/-cu86giT6nrc/Tc8qQBCDC-I/AAAAAAAAUAg/OX9yl0zdbz8/s800/IMG_0518.JPG" height="800" width="600" /></a>

  6. #6
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    Race 29ers have a straiter rake on the fork for faster steering and it causes less drag on the steering. Check it out.
    Spinnin' & Grinnin'

  7. #7
    ballbuster
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    Huh?

    Quote Originally Posted by Rad Rider 415 View Post
    Race 29ers have a straiter rake on the fork for faster steering and it causes less drag on the steering. Check it out.
    Less rake is slower steering. More rake makes it feel faster. The trend in 29er frames has been toward slightly slacker head tubes but with more rake to keep the bike feeling 'quick'. This eliminates toe overlap. Old rebas have 38mm offset, and newer ones are 45mm. Lefty is 45mm also.

  8. #8
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    All forks have to pass the CEN test now and the frame and fork tests are rigourous.

    The test is harder to pass for longer forks due to the leverage. You can be sure Fox test as stringently as anybody and if both forks pass, then they've done their sums on wall thicknesses and crown joins to be sure you can be confident in either fork. Nothing is unbreakable but if you're riding 'normally', don't worry about it. As said above, wheel strength may be more of a concern but a good builder will account for that, no problems there.

  9. #9
    Missouri sucks...
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    My 6'6", 250lb best friend has been riding a Dart3 *HARD* for almost 3 years now. That's the perfect storm for catastrophic fork failure. Nothin...

  10. #10
    Alastair78
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    Quote Originally Posted by DFYFZX View Post
    My 6'6", 250lb best friend has been riding a Dart3 *HARD* for almost 3 years now. That's the perfect storm for catastrophic fork failure. Nothin...
    I have been riding a Dart 2 for 2+ years (HARD), and its still going strong. Just shows that there is hardly any strength difference between the forks. In fact some of the cheaper ones may even be stronger as they have steel components.

  11. #11
    ballbuster
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    Yeah, I think the main point is, the engineers and designers know that a longer fork is going to have greater forces on it than a 26er fork, so they make them beefier to take it.

  12. #12
    R.I.P. DogFriend
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    Quote Originally Posted by Alastair78 View Post
    I have been riding a Dart 2 for 2+ years (HARD), and its still going strong. Just shows that there is hardly any strength difference between the forks. In fact some of the cheaper ones may even be stronger as they have steel components.
    That's kind of hard to quantify that there is hardly any strength difference. I think it would be safer to say that forks are generally strong enough for the use they were designed for. At any rate, although there are a lot more riders that weigh less than you, there are plenty that are larger and likely ride harder. If you haven't 'snapped' your 26" Dart, I think you'll be fine with 29er forks. May be time for you to ride something that is a step up from a Dart though if you can afford it.

  13. #13
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  14. #14
    bike tester
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    Quote Originally Posted by thickfog View Post
    OMG, a road fork snapped when jumped, THE SKY IS FALLING!!!1!

    <iframe width="560" height="349" src="http://www.youtube.com/embed/5z1fSpZNXhU" frameborder="0" allowfullscreen></iframe>

    Oh, this one didn't, nevermind then

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