View Single Post
Old 06-23-2017, 08:08 PM   #22 (permalink)
rmay635703
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,185

Silver - '10 Chevy Cobalt XFE
Thanks: 318
Thanked 614 Times in 453 Posts
Quote:
Originally Posted by cRiPpLe_rOoStEr View Post
It's quite surprising to me. Narrower tyres putting more pressure to the pavement would be supposed to improve traction, and they're also lighter even though sometimes the weight difference might sound negligible.
Narrower tires on my cobalt increased FE and speedo was under 1% off.

While larger tires could have lower RR most are heavier to support a larger vehicle which drives higher RR

Add to this they drive higher CDa which may outweigh aero differences.
  Reply With Quote