Machine Politics vs L'Équipe, August 2010. Photo by Steph Simcox
Fork Swap Geometry Calculator
I've made a calculator for anyone that's interested in the effect that changing a fork would have on some of the important geometry numbers of their frame.
You have to know/measure the following:
Existing fork axle to crown and rake
Head tube angle
Wheel radius (including tire)
New fork axle to crown and rake
Knowing all of these you can easily see the effect the change would have on headtube angle, wheelbase, and trail.
This has all been part of my obsessive search for a new disc fork for an old 26" mountain bike that would either be neutral to or improve (tighten) my handling. The current fork is 398 ac and 35.5mm rake (not perfectly confident in that rake measurement but it's the best I could come up with, seems odd).
Any suggestions for a replacement with a lower a2c that will stand up to polo abuse?
I have my sights on the Kona P2 Disc fork but it looks like I might just have to get a custom. Anyone using the P2?