Fork height, trail, and rake questions

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  • Is it common that with the rake of some forks the wheel comes in contact with the down tube preventing bar spins etc?

    Being new to the game i didn't know the answer and was wonder if this is common or is it possible the forks/steerer tube may have been bent? they look ok, but thought i would ask the question.

    Thanks...

  • more common than not, yes.

  • thanks!

  • Common with bent forks maybe.. unless you mean when the forks are facing backwards, mid bar spin?

  • Yeah meant facing backwards mid spin...

  • Ah, ok then.. what superprecise said. :)

  • Does anyone know how, or if it's possible to change the front wheel position to allow for bar spins?? or is it a case of getting a frame geometry that'll allow it in the first place???

  • yes, you need what I got.....

  • or a 650 on the front

  • Crashing straight, head-on into a wall will often give you quicker steering and enable barspins.
    Your results may vary.

  • so...winston....what you got?

    Is a 650 the only real way...don't you screw the frame geom up?

  • My fork rake on the mercian is pretty tight now. Can you tell I am a bit bitter atm! lol

  • I am looking at replacing my carbon forks on road bike for something lighter.

    current rake is 43mm - will it make a major difference in handling if I get a replacement fork with 44mm rake?

  • is this a joke?

  • Slightly slacker handling, but cant see it being enough to notice.

    PS. Whats lighter than carbon?
    Is it this adamantium I been hearing about today?
    Would it withstand a 5mph impact with a lamborghini?

  • is this a joke?

    If it is, it isn't a very good one.

  • PS. Whats lighter than carbon?

    All depends what the current fork it. If alloy steerer then could save up to 300 grams from going to a heavyish carbon fork to a very light full carbon fork.

  • exactly - I got an alloy steerer, going all weight weeny and getting a full carbon. been offered a very good deal by a mate on the new fork, but it's 44mm rake hence unsure whether to go for it.

    no joke, just a simple request for help from an idiot (me) to much wiser people (all of you)

  • exactly - I got an alloy steerer, going all weight weeny and getting a full carbon. been offered a very good deal by a mate on the new fork, but it's 44mm rake hence unsure whether to go for it.

    no joke, just a simple request for help from an idiot (me) to much wiser people (all of you)

    If you can notice 1mm fork rake change then you must have special powers. No, it won't make any difference at all. The axle to crown length may also be different but again you probably couldn't notice it

  • i do have special powers, naturally, but they don't lie in the noticing 1mm-extra-rake department as far as I'm aware.

    so all cool!

    mucho thanks for the advice, Kerley

    If you can notice 1mm fork rake change then you must have special powers. No, it won't make any difference at all. The axle to crown length may also be different but again you probably couldn't notice it

  • Someone, on a thread dealing with Pompinos, posted a link to a web page that, using any two of these three variables (trail, rake, or axle to crown height) would give you the third. It was a very handy little application for nerding out. Anyone have it?

    Actually... It may have used head tube angle as well... Hrm.

    Also, in the same thread, someone said you gain or lose 0.7 degrees per CM in fork height. How does rake affect this? Anyone know?

  • +1

  • i know the one you mean, but couldn't find it again.
    alternative:
    http://yojimg.net/bike/web_tools/trailca­lc.php
    http://kogswell.com/geo.php

  • nice one, Josh! thanks man.

    (btw, I'm getting a used Pompino. Do you still have the fork dimensions?).

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Fork height, trail, and rake questions

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