MustangWorks.com : Ford Forums - View Single Post - 17x9 Cobra R's and lowering springs on fox

drudis · 11-21-2002, 01:03 PM

1.5" is about optimal for street driving. Any lower and you get negative bumpsteer characteristics.
Best way is to BORROW someone's wheels/tires and do an exact fit. The Cobra R's come in R58 and M179 with 5.95 and 6.45 backspacing.

I personally run 275-40-17's on 9-1/2" wheels, but that took a LOT of work!!!

11-21-2002, 01:03 PM	#9
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	1.5" is about optimal for street driving. Any lower and you get negative bumpsteer characteristics. Best way is to BORROW someone's wheels/tires and do an exact fit. The Cobra R's come in R58 and M179 with 5.95 and 6.45 backspacing. I personally run 275-40-17's on 9-1/2" wheels, but that took a LOT of work!!! __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com