Join Date: Nov 1999
Location: Where the Navy sends me...
The '98 Cobra wheels are 17x8", 5.72" backspacing, just like all of the other 17x8" GT and Cobra wheels. The 17x9" R58 Cobra R wheels I ran for years with coilovers have a 5.95" backspacing. Basically, it's not the wheels that are the problem in this equation.
I think the combination of the Fox spindle + long springs is the problem.
'89 GT convertible, N/A 357W, MM front susp w/425# coil-overs and Koni D/As, MM TA/PB rear setup (Koni Yellows, 390-430# springs), Stoptech 332mm / 12" Baers, MM 6 point rollbar, Maier 1.5" flared fenders & quarters, 18x9.5" front/18x10.5" rear Enkei RPF-1s (street), 18x10" CCW C-10s (track), etc...