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I am looking to change my fork because of some issue(broken). My problem is my headtube is the standard ec34, which is why I can't use tapered fork. So, I am looking at some mtb rigid fork, which have straight steer tube, but I am not sure whether it will work, and the sizing. A 29er fork has axle to crown distance about 430mm, but as far as I measure my former fork the axle to crown distance is only around 375-380mm. A 40mm difference, and it doesn't include the crown to steer tube distance.

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  • Would you ride with 23mm tire in the back and 63mm tire in the front? If not, then you probably don't want to increase axle-to-crown distance by 40mm.
    – juhist
    Jul 10 at 8:43
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    If you are using disc brake, you could try a fork meant for 26'' which probably has the correct axle-crown distance
    – JoeK
    Jul 10 at 14:01
  • Why not use an actual touring bike fork?
    – RLH
    Jul 10 at 17:09
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    @joek The OP mentions needing a straight tube steerer as their motivation for looking at a mountain bike fork, not cost. Several brands, e.g., Surly, offer straight-tube touring forks.
    – RLH
    Jul 10 at 21:40
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    @gamalan the axle-crown measurement is generally taken from the ledge the bearing race sits on (crown race) down to the axle. The design of the fork can affect tyre clearance but doesn't change the measurement.
    – JoeK
    Jul 11 at 7:39

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