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  1. #1
    Senior Member
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    recomended crank arm length?

    as the title says. 170mm,165,mm or 160. i have no idea. mostly gonna use the bike for commuting. whats the difference? thanks in advance

  2. #2
    Senior Member
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    i would say 165, i'm running 170 right now and wish they were a lil shorter.
    derailleur? I hardly know her
    http://a2bikegeek.wordpress.com/

  3. #3
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    how tall are you? how fast will you ride? how hard do you corner? how hilly is the route?

    short arms favor shorter legs, high rpm spinning, cornering clearance, and less leverage.
    longer, the opposite.

    i have fairly short legs (29" inseam), ride 20mph +/- 5 in rolling hills, and watch my corners. i started with 165 and moved to 170. i like the extra leverage, upped my gear one tooth to slow the spin and take advantage. have yet to strike a pedal, but do try to keep the bike more upright in the corners.

    $0.02.

  4. #4
    IRL Banhammer idiq's Avatar
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    170's.

    165 is for higher cadence / spinning. I had 165's (ride a 54cm, 5'9, 32" inseam) and like the 170's a lot better.
    saddle sores bike club | prepare to be rode

  5. #5
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    ahh i see. thanks for all the info and help

  6. #6
    teamn9ne
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    I have a 65 on the right and a 70 on the left!
    its awesome....nooot
    but hey I gotta use what I got

  7. #7
    Street Pharmacist
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    Quote Originally Posted by slotmachine View Post
    I have a 65 on the right and a 70 on the left!
    its awesome....nooot
    but hey I gotta use what I got
    o.O

  8. #8
    Raving looney
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    Quote Originally Posted by Pennywize View Post
    o.O
    lol +1

    I have 170s on my Rob Roy, have yet to strike a pedal, but have ground/scratched up the crank ends with bad pedal position going over obstacles (oops... beausage?). Seem to work nicely for me, I can still spin upto 120/130 usually no problem, higher than that is a rare effort

  9. #9
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    Compromise with 167.5

  10. #10
    Senior Member PanFry's Avatar
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    Anybody running 175's? I have a 35" inseam and I wonder if 170's would be long enough.

    ???

    Any thoughts?

    PF

  11. #11
    Street Pharmacist
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    pedal strike sucks. 165 is ideal

  12. #12
    Senior Member sfcrossrider's Avatar
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    Quote Originally Posted by PanFry View Post
    Anybody running 175's? I have a 35" inseam and I wonder if 170's would be long enough.

    ???

    Any thoughts?

    PF
    I have 175s on my FG cross bike. I have yet to have any issue in a race, or otherwise. If you're tall... 175s are the way to go.
    Quote Originally Posted by BikeIndustryGuy View Post
    I guess the feel good aspect of this story is that the perpetrators did this as a couple. It's nice to see people coming together with a common love of cycling and assault.

  13. #13
    IRL Banhammer idiq's Avatar
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    Quote Originally Posted by Pennywize View Post
    pedal strike sucks. 165 is ideal
    If you have an actual FG you don't have to worry as the BB is almost as high as a mountain bike... if you're riding some road conversion, pedal strike is more of a threat.
    saddle sores bike club | prepare to be rode

  14. #14
    Senior Member PanFry's Avatar
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    Cool.

    Quote Originally Posted by idiq View Post
    If you have an actual FG you don't have to worry as the BB is almost as high as a mountain bike... if you're riding some road conversion, pedal strike is more of a threat.
    62cm. IRO Mark V. I think I will stick with 175's.

    Many Thanks,

    PF

  15. #15
    Senior Member
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    I have some FSA Vero which are like 173.5 or some **** like that


    I really want 165's to see what spinning is like w/ the shorter crank arms

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