Quote:
Originally Posted by Chrisar82
I'm sorry, but what is the issue with the bias? How will it affect it?
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Straight up force vs. area. A 42mm piston has 110% of the area of a 40mm piston, and therefore 10% more "clamping" force shifting bias towards the rear. Throw on great big front calipers without changing the rears and the formula is reversed and bias shifts towards the front.