Close it's the pad area in mm^2

Kinda self-explanatory - the area swept by the pad

Now calculating that area will be fun considering the shape of the pad, but you could apprximate it to a portion of a disc.

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!