MustangWorks.com : Ford Forums - View Single Post

GTJim · 07-02-2002, 10:02 AM

My bad, I miscalculated.... here are the actuals:

Stock Diameter = [245 (.45) (2)] + [17 (25.4)] = 652.3mm

New Diameter = [255 (.45) (2)] + [17 (25.4)] = 661.3mm

So, 661.3 - 652.3 = 9mm/25.4mm = .35" difference in tire height

New circumference would be 3.14 (661.3) = 2076.5mm

Old circumference is 3.14 (652.3) = 2048.2

So, 2076.5 - 2048.2 = 28.3mm/25.4 = 1.1" difference in circumference

Whew, been a while since i took geometry

07-02-2002, 10:02 AM	#5
GTJim Registered Member Join Date: Mar 2000 Location: Rio Rancho, NM Posts: 32	My bad, I miscalculated.... here are the actuals: Stock Diameter = [245 (.45) (2)] + [17 (25.4)] = 652.3mm New Diameter = [255 (.45) (2)] + [17 (25.4)] = 661.3mm So, 661.3 - 652.3 = 9mm/25.4mm = .35" difference in tire height New circumference would be 3.14 (661.3) = 2076.5mm Old circumference is 3.14 (652.3) = 2048.2 So, 2076.5 - 2048.2 = 28.3mm/25.4 = 1.1" difference in circumference Whew, been a while since i took geometry __________________ 2001 Mineral Grey Cobra - #2277 of 3867 - MM SFC's, Bilsteins, Rear: H&R race springs, PHP IRS brace, Steeda IRS bushings, Front: MM Coilover conversion w/ Hypercoils - JBA Headers, Bassani X-pipe, Dynomax Ultra-Flow catback - Procharger P-1SC Stage II