Nissan 370Z Forum - View Single Post

ChrisSlicks · 05-27-2011, 08:25 AM

I think you have it backwards. The shorter tires are going to lower your speed in gear.

Best way to think of it is in terms of revolutions:
engine revolutions * gear ratio * final drive ratio = axle revolutions

Distance traveled per gear at max RPM is therefor a factor of tire circumference as distance will equal axle revolutions * tire circumference

Edit: Okay jnaut has it right, just saw the raised RPM for new trap

05-27-2011, 08:25 AM	#9 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	I think you have it backwards. The shorter tires are going to lower your speed in gear. Best way to think of it is in terms of revolutions: engine revolutions * gear ratio * final drive ratio = axle revolutions Distance traveled per gear at max RPM is therefor a factor of tire circumference as distance will equal axle revolutions * tire circumference Edit: Okay jnaut has it right, just saw the raised RPM for new trap __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms