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People are running C6 Z06 wheels without issue aside from the wheels sticking out a little so the tire size should be okay. The C7 Z06 wheels have similar offset, the rim is just 1" taller.
The C7 base rear rims have a 79mm offset and the C5 rear rims have a 58mm offset rears so you would need 3/4 to 1" (actually 20mm) spacers/adapters.
I have seen them without spacers and they look a little caved in on the rear to me. People have achieved good results with spacers but for some reason I'm not a fan either. It is your only option if you want base C6/7 forged Speedline rims affordably.
I just bought some C6Z wheels for about the same price. I don't have tires yet.
I have had the 20mm spacers on the rear now for over 6 months.
When I installed them I used Loctite Blue on each stud and torqued each one to 100 Ft/Lbs. I drove 365 miles round trip from home in NJ to Carlisle PA and back, at highway speeds of 80 plus mph, with no issues. I just had the wheels off the car this past weekend to clean and detail. Checked the torque and they are still holding the 100 lbs of torque.
I would rather have spacers on OEM Speedline's than cheep cast rims without. The QC can be hit and miss on the Asian ones. The forged Speedline's are stronger and lighter too.
I would rather have spacers on OEM Speedline's than cheep cast rims without. The QC can be hit and miss on the Asian ones. The forged Speedline's are stronger and lighter too.
Running OEM C6 chromed 5 spokes on mine so I'm not worried.
