Hello can anyone help me in this matter I want to fit 17in wheels on my 3 door cosworth and I do not want to cutback the archs and they also have fit over 6 pots brakes with 335mm discs at the front and 4 pots with 328mm discs on the rear what I think I have come up with that will also look good as well is
7.5j x17 with an offset of et35 with tyres of 205/40/17 on the front
8.5jx17 with an offset of et30 wth tyres of 235/40/17 on the rear
I you own a 3 door cosworth do you think these would fit or even better what do you run on your car
thanks very much for any help given

 

An important thing ,is it standard ride height or lowered as this will make a difference.

 

I am using koni adjustable shocks and Bayjoo road spring which are not much lower than stock spring just uprated

 

The combination you are planning on fitting should be ok without needing to roll the arches.

 

I tried 205 40 17's on the front of mine. They looked horribly stretched so I went to 215's. They then rubbed on the arches so I had to modify them. Beefing up the front suspensions bushes helps as this stops the wheels moving back relative to the body when braking. Really, 205s on a 7.5" wheel look awfully stretched.

 

Lowered 30mm, 215/40/17s front and back with rolled arches . Koni adjustable on the front Bilsteins on the back both with lowered springs.

 

Looks great but the front arch extensions on the 3 door really do limit the space.