David_Dymaxion
02-21-2003, 02:18 PM
I'm looking forward to running my first autocross of the season. I just had BF Goodrich G Force KD's put on the car. Any recommendations for tire pressures to run? It's almost sick, I just paid a fair number of dollars for these babies and I can't wait to start wearing them out!
For comparison, last year I had BF Goodrich Comp TAs. They came on the car, so I don't know how many miles I started with, but I drove them 18,000 miles, 7 autocrosses, and probably could have gone another couple thousand (one had a deep cut and bad leak, so I just changed them).
I ran the Comp TA 55 to 60 psi front, and 45 to 50 psi rear. Sidewall rating is 44 psi. If I ran lower than that, the sidewalls would show scuffing from rolling under.
The KDs are an inch narrower, and the edges are much more rounded, so they look alot smaller. By the specs they should be only 1 inch narrower and 1/10 inch lower.
My rims are the stock 8 inchers, the KDs are 9 inches, and the Comp TAs were 10 inches, so I'm hoping this leads to the tire rolling under less.
For comparison, last year I had BF Goodrich Comp TAs. They came on the car, so I don't know how many miles I started with, but I drove them 18,000 miles, 7 autocrosses, and probably could have gone another couple thousand (one had a deep cut and bad leak, so I just changed them).
I ran the Comp TA 55 to 60 psi front, and 45 to 50 psi rear. Sidewall rating is 44 psi. If I ran lower than that, the sidewalls would show scuffing from rolling under.
The KDs are an inch narrower, and the edges are much more rounded, so they look alot smaller. By the specs they should be only 1 inch narrower and 1/10 inch lower.
My rims are the stock 8 inchers, the KDs are 9 inches, and the Comp TAs were 10 inches, so I'm hoping this leads to the tire rolling under less.