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Message: <blockquote data-quote="Jules" data-source="post: 111485" data-attributes="member: 88">OSF, great info on line pressures. I think it's important to translate this to resulting caliper force.....which can be done by multiplying it to the piston surface area.Logically & I am guessing here - the e30 would have a smaller total piston surface are ( all 4 pistons added up ) versus those found on the E38......hence a higher force on the pad is expected. You can calculate this for every caliper of course.....Which MAY result in higher wear - as Bundy has correctly said.MAY cos it is dependent on driving techniques......and no - OSF, I tink you mistake me with someone else-lah......cos normal sane people will look for power gains first, not brakes!</blockquote>