riotboy
03-03-06, 12:08 AM
N/t
Singlespeed & Fixed Gear - how do you measure the bolt pattern for chainrings?
Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.View Full Version : how do you measure the bolt pattern for chainrings?
baxtefer
03-03-06, 12:11 AM
measure adjacent holes center to center and multiply by 1.7
riotboy
03-03-06, 12:12 AM
NM i found it on sheldon brown. this can drop. thanks!
fixedpip
03-03-06, 02:21 AM
For those wanting to know, the URL is:
http://www.sheldonbrown.com/gloss_bo-z.html
BCD is the first item in this section. Has a very clear explanation on how to measure it for 4 and 5 bolt crank arms, as well as a table of common bcds and their uses so you can double check your calculation.
http://www.sheldonbrown.com/gloss_bo-z.html
BCD is the first item in this section. Has a very clear explanation on how to measure it for 4 and 5 bolt crank arms, as well as a table of common bcds and their uses so you can double check your calculation.