My 2011 Salsa Casseroll (2011 Casseroll | Bikes | Salsa Cycles) has large amounts of trail (60 mm) so i've been thinking about having the fork rake adjusted to a lower number for various reasons. Can someone recommend a couple places in the general Seattle area that have this capability and are known to do good work, any idea about pricing for this? Was thinking of asking Elliot Bay Bicycles about it but see they shut down. I tried asking in the comments on Jan Heine's blog in the comments but either my question is being deleted (twice!) or something went wrong.
Why do this?
Re-raking the fork seems a good way to try out the wonders of low trail geometry on a bike i know well and that has some issues i don't like. The effects of low trail geometry are expounded on at length in Bicycle Quarterly - i have drunk deeply from that Kool-Aid and want to try it on my bike. The issues are major toe strike/overlap (doubt this will be fully solved), the usual feeling of the tail wagging the dog when panniers are loaded, a few times i've had major shimmy when hitting a sharp edged bump going downhill (more like tank slappers that scared the hell out of me the first time), and handling with a front load. The latter i suspect is aggravated by the large amount of trail which amplifies the impact to the frame, setting up the shimmy. Mostly, i just want to try low trail geometry!
Stock geometry is as follows:
head tube angle 72deg
tire width 32mm
This produces a long 60mm trail per various online calculators such as Bicycle Trail Calculator | yojimg.net
If offset is increased to 60mm by adjusting the fork rake, trail is reduced to a much lower 50mm. Head tube angle steepens by a small amount, likely less than 0.5 deg so don't expect that to present a major issue.
Increasing trail to 64mm (not sure how feasible this is) results in 45mm trail.
I have plenty of adjustment in my brakes, not sure how much the tire moves closer to the bottom of the fork crown but probably a reasonable amount to not present an issue with my fenders.
Recommendations for places to help perform this work?