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Technical & Reference Section => Tech and Restoration => Topic started by: therock on December 14, 2008, 01:55 PM

Title: what length cranks
Post by: therock on December 14, 2008, 01:55 PM

what length cranks should i fit to a 18" bike . any idea s

Title: Re: what length cranks
Post by: MartyC on December 14, 2008, 02:10 PM

165mm or 170mm at a guess. 155mm would strike me as too short but I don't really know so why I'm posting I don't know  ;D.

Title: Re: what length cranks
Post by: mr.magoo on December 14, 2008, 02:36 PM

more depends on how old the rider, and how long their legs are, and if for an adult, how much ground clearance you want.

155 is good for a pit bike, or my lad is eight, and i've put 155's on his 20", so if 18" is for a youngster probs 155 or 160

hope that helps a little?

Title: Re: what length cranks
Post by: Gary72 on December 14, 2008, 07:57 PM

have 140's on a 16 inch, have started looking at 18 inch bikes, some have 140's and some 150/155.

Title: Re: what length cranks
Post by: therock on December 15, 2008, 04:33 PM

mmmmmmmmmmmmmm cheers for that guys . now who has some for sale