Pablo

I am trying to figure out if a set of Techart Formula GT's will fit my 1998 C2S. The wheel specs are 8.5x18 front and 10.5x18 rear. Are any spacers required on the rear wheels?? Or should they fit without spacers. Currently I have 18 hollow spoke from factory. Thanks for your help!!

Pablo

The wheels and tire sizes of the techarts I am looking at are as follows: Fronts 225 40 18, 8.5x18 offset 40mm and Rears 295 30 18 10.5x18 offset 42mm (has 15mm spacers) Question!!! Will this set-up fit a 1998 C2S Widebody??? Thanks in advance!!

David in LA

The fronts will work, although depending on how low your car is and what brand of tires you MAY have to roll the fenders slightly but that's not a big deal. I don't understand your spacer comment though...do the rears have ET42 and you are using 15 spacers for an effective ET27? Or are the rims ET57 and you are using 15mm spacers to get an effective ET42? The latter will fit but the former may depend on tire brand, but I think they will probably fit...in any case since you are using a spacer you can always substitute a smaller spacer to make the rears fit.

993_Pilot

At ET 42, the Rear wheels should be OK without spacers, however the offset for the front doesn't seem like quite enough. Normal for the front would be closer to 52, but will probably still work depending upon ride height, camber, tire selection, etc. Attatched is a spreadsheet to play with.

Also check out Bill Verberg's wheel fitment page HERE

or this online Wheel offset calculator HERE

Pablo

The wheels and tire sizes of the techarts I am looking at are as follows: Fronts 225 40 18, 8.5x18 offset 40mm and Rears 295 30 18 10.5x18 offset 42mm (has 15mm spacers)...the rear wheel offset is 42mm WITHOUT the 15mm spacers. Part numbers for the wheels are as follows: Front-#096.210.858.040GT Rear-#096.210.058.042GT (according to Techart's website, the rear part # I have requires 15mm or 18mm spacers ofr widebody?? Good God I am confused!!

kdurg

You don't need a rear spacer if the rear rims are ET42. You're fine there.

If you use the rear spacer the rear rims will be extended beyond the fender lip.

Pablo

I am assuming since the front wheels are ET40 that would mean they will come farther out towards the fender, my hollow spokes front are ET52. If I do not use the spacers on the rear wheels (ET42), hollow spoke ET40, won't it look off...meaning the rear wheels would sit inside the wheel well much more than the fronts???

993_Pilot

True, the front wheels will be 12mm (or about 1/2") closer to the fender lip at that offset on the front, and you may get some rubbing, depending upon ride height, camber, tire choice, fender rolloing, etc. If you use the spacers on the rear wheels, you could have the same issues, however without the spacers on the rear wheels, you should be fine. The offset that you are suggesting on the front and the rear (with use of a spacer) are less than optimum, although they might still work. Carefully measure your clearance now, then play with the spreadsheet I put up on my last post above. Assuming that you are using the same tires, It will give you a really good idea how your clearances will change.