Join Date: Jun 2010
Location: NW,Oregon Coast
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Trail is the dimension on the ground, all else remaining the same , more rake is less trail.
NB: Fork tip to crown race seat difference changes things head tube angle,
, and tire width.
Jim only ads tire width change input.
Wheel diameter effects trail.. the intersection of the 2 lines is crossing above the ground .
a Change of just 2mm is likely not perceptible .. [depending on your obsession level]
OK I know you are talking Race bikes , but were the fork hauling a Load,
then the heavy weight stabilizes steering, then shorter trail is good.
My Folding bike has a 35mm trail.. load the cargo bag on and it's all Good.
Last edited by fietsbob; 12-11-13 at 03:59 PM.