Quote:
Originally Posted by ehagerty
340 front and 345 rear?
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This is somewhat common on non-sliding caliper designs as the front calipers are beefier compared to the smaller rear calipers. They do this to fit inside the wheels. they make up for the smaller diameter in the front by adding more friction surface area to the pads/rotors. The use of larger rear rotors can also slightly improve brake bias, adding more to the rear. Stock systems are generally overly front biased for safety.