RoadBikeReview.com's Forum Archives - Components


Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )


Fork Help(4 posts)

Fork HelpJELLIOT1
Oct 24, 2003 12:10 PM
I am considering replacing my stock Kinesis aluminum fork with a easton EC70. The one I have found reads the following specs

Fork offset 43mm. Length 27". 1 1/8" steer tube.
Are these standard measurements, how do I know if this will fit my bike?

Also does anyone think color coordination matters. This is a black fork that will go on a silver and white bike.
need info...C-40
Oct 24, 2003 12:47 PM
To determine an appropriate fork you should determine the rake of your current fork or the head tube angle and measure the length of your fork from the center of the axle to the underside of the crown race. Without this info, buying a new fork is shot in the dark.

FWIW the length of an Easton fork is 366mm, which is on the short side. Others brands are as long as 374mm. An 8mm change in the length of the fork will change the head tube angle by about .4 degree, which is significant.
need info...JELLIOT1
Oct 24, 2003 12:58 PM
Because I have no idea what you are talking about I found a website that may help me translate. For future reference go to http://www.parktool.com/repair_help/howfix_forksize.shtml.
help with installation, not purchase....C-40
Oct 24, 2003 1:40 PM
Park tool has good instrauctions for bike maintenance, but that's what you need after you determine the proper fork to buy. Head tube angle, fork rake and fork length all affect the amount of trail, which determines if the steering response will be slow or fast. I don't believe that any of the sites mention variations in fork length, but since there is no standard, it should be checked. A metric tape measure has sufficient accuracy to check the fork length.

Here are sites that discuss steering geometry:

http://www.phred.org/~josh/bike/trail.html
http://www.kreuzotter.de/english/elenk.htm
http://www.juliuss.clara.net/bicycle_handling.html
http://www.johnforester.com/Articles/BicycleEng/dahon.htm