Standard crank arm length?

page23
page23 Posts: 182
edited September 2008 in Workshop
hi,

am having a brain-freeze moment. on an average bike with say an ultegra or dura ace groupset, what would be the standard crank arm length?

thanks in advance.

Comments

  • singlespeedexplosif
    singlespeedexplosif Posts: 1,564
    175mm
  • Simon Notley
    Simon Notley Posts: 1,263
    I'd say 172.5mm was more standard... but maybe it depends on the size of bike. Anywhere between 170mm and 175mm is perfectly normal
  • redddraggon
    redddraggon Posts: 10,862
    170mm, because a lot of cyclists are short arses. I use both 172.5mm and 170mm and can't really tell the diference.
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  • cougie
    cougie Posts: 22,512
    Unless legs have changed lately - its always been 170mm.

    To be honest - i defy anyone to spot the difference just by riding the bike.
  • alfablue
    alfablue Posts: 8,497
    Usually 170 on road bikes, 175 on mtb's
  • maddog 2
    maddog 2 Posts: 8,114
    cougie wrote:
    i defy anyone to spot the difference just by riding the bike.

    now there's a gauntlet :wink:

    I reckon I can, at least on back-to-back bikes if they have different lengths.

    To get the length on a single bike you've never ridden would be a good test though.
    Facts are meaningless, you can use facts to prove anything that's remotely true! - Homer

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