Rigid fork size for MTB

mrkev83
mrkev83 Posts: 184
edited November 2014 in The workshop
how do I know what size rigid fork to buy? I've been on eBay and got confused
it's for a diamond back m05

thanks in advance
http://www.strava.com/athletes/mrkev83

Built for comfort... Not for speed

Comments

  • The Rookie
    The Rookie Posts: 27,812
    You need to match up the following
    1/ Steerer diameter (almost certainly plain 1 1/8th on your DB)
    2/ Steerer length (as long as is required with no spacers as a minimum).
    3/ axle to crown (race) length, run no more than 20mm less than your current forks.
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • mrkev83
    mrkev83 Posts: 184
    Thanks for the info :)
    http://www.strava.com/athletes/mrkev83

    Built for comfort... Not for speed
  • supersonic
    supersonic Posts: 82,708
    And make sure it has the correct brake mounts.
  • I’m converting a Genesis Core 20 to a lighter commuter bike. I want to replace the 120mm Tora 289’s with a rigid cromoly fork, saving over 1kg. I’m not sure what a2c to go for. The current Tora fork has an un-sagged a2c of 500mm.
    Salsa do several cromoly forks from 445mm to 483mm. Some 29er and some 26er, I’m guessing the important measurement is the a2c but do I need to consider the rake also.
    Planet X Kaffenback 2
    Giant Trance X2
    Genesis High Latitude 2x10
    Planet X n2a
    Genesis Core 20
  • Ouija
    Ouija Posts: 1,386
    I’m converting a Genesis Core 20 to a lighter commuter bike. I want to replace the 120mm Tora 289’s with a rigid cromoly fork, saving over 1kg. I’m not sure what a2c to go for. The current Tora fork has an un-sagged a2c of 500mm.
    Salsa do several cromoly forks from 445mm to 483mm. Some 29er and some 26er, I’m guessing the important measurement is the a2c but do I need to consider the rake also.

    445mm is too low, 475'ish will be better for a 120mm fork.
  • That's what I suspected, sounds as though I'd be better off with a 29er short travel corrected option.
    Planet X Kaffenback 2
    Giant Trance X2
    Genesis High Latitude 2x10
    Planet X n2a
    Genesis Core 20