Ok so im wanting to go wider in the back and im thinkin 10.5, I dont know if i want to 17s or 18s but what off set would they need to be? They are going on a 2003 GT. Thanks for the help and if any one has pics it would be great. The car is lowered but im using the stock rear end.

 

Hey, Bert *chorus of MF's members*

You can go either 17" or 18" with 10.5"s on your ride. I recommend 18"s as you will have a wider choice of tires in which to choose. You are looking at a +28mm off-set or 6~3/4" back-space to run them. You may also encounter some fender contact inside/outside depending on the tire you run. This can be corrected pretty easy, but need to do some clearance checking just after install. You will also very likely need to adjust your speedo as tire diameter will be larger and speedo will be slower.

As for pics, so some searching around via Google and MF's. You will also find some in the SVT section. You can peep my gallery below, but am running 11"s. Not alot of difference, but the R888's run wide as well.

HTH

 

Thanks for the info. As far as the speedo being of and finding what size tire to run i have a site i use that can tell me what the best tire to run is. It gives the diameter, width everything. I would post it up but dont want to get in trouble for advertising for another sight.

 

You won't get in trouble for advertising another site for tire size/speedo calculators.

TireRack.com has one and some others as well. You can just look up the tire you want to use and the diameter will be listed. Usually the revs per mile as well. If you have any more ?, just post 'em up.

Post up some pics when all done, as I like to drool on others rides