I'm Finding My Feet Here Now
Join Date: Apr 2006
Location: Gothenburg, Sweden.
Posts: 144
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Hello! You can use rims with both 7,5 and 8,0 width. try to stay as close as possible to the standard ET(offset) which is 40mm on a Cosworth and 41mm on a standard Sierra. Then you won,t uset your steering geometry. "15/45x17 tyres will not work so good, because the tyres will touch the spring platform on the shockabsorber because of the bigger diameter. 215/40x17 is no problem at all. Otherwise you have to use coilover suspension. Many guys use offsets of around 35mm, and that is also ok, but not more in my opinion.
Good luck!
Johnny Lehti.