View Single Post
Old Oct 19, 2013 | 03:42 PM
  #11  
Jay,'s Avatar
Jay,
Sponsor
iTrader: (4)
 
Joined: May 2004
Posts: 25,221
Likes: 407
From: south east
Default

550R 650F has been the rule of thumb on a race car cosworth on slicks If its a dedicated track car running road tyres id start off with 400f and a 300 rear
Reply