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SlowGT · 08-20-2002, 11:16 PM

try this math from the FMS 2002 catalog:

(drive gear teeth X axle ratio X tire rev per mile)/1000 = # of teeth on the driven gear.

(7 X 3.55 X 815)/1000=20.25 ==>black

815 is rpm for a 225/60-15. TireRack has pretty good info for finding rpm for your particular brand/size.

for T-5:
21T = red
20T = black
19T = pink

08-20-2002, 11:16 PM	#10
SlowGT Registered Member Join Date: Jun 1999 Location: Columbia Co, PA Posts: 303	try this math from the FMS 2002 catalog: (drive gear teeth X axle ratio X tire rev per mile)/1000 = # of teeth on the driven gear. (7 X 3.55 X 815)/1000=20.25 ==>black 815 is rpm for a 225/60-15. TireRack has pretty good info for finding rpm for your particular brand/size. for T-5: 21T = red 20T = black 19T = pink __________________ Old Slow GT New Slow GT--> under construction Latest Addition: 95 Cobra R, #73, bone stock, ~6100 miles.