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  1. #1
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    trying to locate rigid fork that measures 426 mm

    google unable to find a steel fork with disc brake mount tabs

    1-1/8"

    426 mm axle to crown

    will i have to add spacer under bottom race or ?

  2. #2
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    There's a 430mm Origin 8 fork. A 2.4 Ardent gets a little tight but fits with enough room. I had it on a monstercrossish bike. It's nothing special but it will get the job done. I did remove the 700c brake studs though. A little time with a dremel and they were gone. Only kept that frame for a month though. Should have left the studs on.

  3. #3
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    Look for forks designed for 26'r wheels.

  4. #4
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    i have looked for 700c 26" and 29" rigid forks

    none are available in 426 mm

    how much of a difference will 4 mm longer make ?

  5. #5
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    Quote Originally Posted by lunna View Post
    google unable to find a steel fork with disc brake mount tabs

    1-1/8"

    426 mm axle to crown

    will i have to add spacer under bottom race or ?
    your google fu needs training.
    I found one in about 20 seconds (assuming 425mm is passable), and it looks like there are at least a couple to chose from.
    link
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

  6. #6
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    trying to locate rigid fork that measures 426 mm

    Quote Originally Posted by lunna View Post
    i have looked for 700c 26" and 29" rigid forks

    none are available in 426 mm

    how much of a difference will 4 mm longer make ?
    Not a lot. There is more variation in tire radius.

    What about the fork offset? That matters, too, as much as the A-C
    mtbtires.com
    The trouble with common sense is it is no longer common

  7. #7
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    Quote Originally Posted by shiggy View Post
    What about the fork offset? That matters, too, as much as the A-C
    agreed
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

  8. #8
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    Here is one that is 425mm. Now shut up and buy it.

    Salsa Cromoto 26" Fork > Components > Forks | Jenson USA Online Bike Shop

  9. #9
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    and another one......Surly Big Dummy Fork > Components > Forks | Jenson USA Online Bike Shop

    you must not have looked very hard.

  10. #10
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    thank you.

    should i buy forks based on sag

    or

    air up forks to max and then measure axle to crown ?

    since the bike would be experiencing sag with front shocks while it use.

    ?

  11. #11
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    trying to locate rigid fork that measures 426 mm

    Quote Originally Posted by lunna View Post
    thank you.

    should i buy forks based on sag

    or

    air up forks to max and then measure axle to crown ?

    since the bike would be experiencing sag with front shocks while it use.

    ?
    Buy any of the rigid forks linked. Air it up to max, then sag it, then measure a-c, then deflate to zero, measure again, take the geometric mean, round up, put your left foot in & shake it all about.
    WTF?!?
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

  12. #12
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    so you don't know either ?

    i am going to hold off
    until i can get more info on proper frame geometry
    when frame was intended for front suspension
    and how ride and handling is effected by normal pre-load of suspension forks .
    and what fork length is best when changing the bike over to rigid forks

    thank you.

  13. #13
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    trying to locate rigid fork that measures 426 mm

    Quote Originally Posted by lunna View Post
    so you don't know either ?

    i am going to hold off
    until i can get more info on proper frame geometry
    when frame was intended for front suspension
    and how ride and handling is effected by normal pre-load of suspension forks .
    and what fork length is best when changing the bike over to rigid forks

    thank you.
    Waiting until you understand what's involved is probably a good idea.
    You went off on a tangent. That's the question you ask before you decide you need a 426 mm fork. Sag should be factored in looking at A-C of sus forks.
    Thing is, different people use different sag, different manufacturers use different specs, and A-C changes continually.
    The easiest thing to do would be to buy a "suspension corrected" rigid fork that matches the travel of your current fork.
    You also don't need to pump a suspension fork up to max pressure to get full extension, just unload it.
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

  14. #14
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    A rigid fork with ~425 AC length is 80mm suspension corrected for a 26" bike. ~470mm is 80mm for a 29r. Either measure your AC with suspension fork when it's sagged or measure at full extension & reduce that by 10-20%.
    I think there's some rigid 490ish AC forks out there, but most are in the 470mm range.
    [SIZE=1][/SIZE]

  15. #15
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    trying to locate rigid fork that measures 426 mm

    Quote Originally Posted by logbiter View Post
    measure at full extension & reduce that by 10-20% of the travel
    FIFY
    Last edited by meltingfeather; 05-03-2013 at 12:13 PM.
    Quote Originally Posted by pvd
    Time to stop believing the hype and start doing some science.
    29er Tire Weight Database

  16. #16
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    Quote Originally Posted by meltingfeather View Post
    FIFY
    man, I keep doing that! thanks
    [SIZE=1][/SIZE]

  17. #17
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    trying to locate rigid fork that measures 426 mm

    Quote Originally Posted by logbiter View Post
    A rigid fork with ~425 AC length is 80mm suspension corrected for a 26" bike. ~470mm is 80mm for a 29r. Either measure your AC with suspension fork when it's sagged or measure at full extension & reduce that by 10-20% (of travel).
    I think there's some rigid 490ish AC forks out there, but most are in the 470mm range.
    I use 20-25% sag.
    mtbtires.com
    The trouble with common sense is it is no longer common

  18. #18
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    thank you ...

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