If you remember your physics classes back in hi school or college you'll recall Pascal's law which states P=F/A where P is pressure, F is force and A is cross-sectional area the force acts on. A = the volume of fluid. Disc brakes (calipers) have a larger volume than the volume of the rear wheel cylinders, hence the larger brake line. I hope this helps.
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70 chev c-10, bagged, shaved, and slammed
99 Screamin Eagle 103ci Road King HD
68 SS Chevelle BB
02 Denial (Denali)
IF IT HAS TITS OR WHEELS YOU'RE GOING TO HAVE PROBLEMS!
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