I know that the stock 15" lace wheel has a 30mm offset. Can someone tell me what the back space is on a 15" lace wheel? I'm looking for some custom wheels for my wide body and some of the custom wheel manufacturers ask for a back space measurement. I don't' have a stock 15" wheel to take a measurement on. Thanks in advance!
Fitting anything larger than a 275 on the back of the fiero is a challenge all in itself. Coilovers will be required , and even then guys say that 17"s won't give enough clearance on the knuckle.. 18"s and your good.
And THAT is the tough part. The only wheels that I have found to be "0" offset are all custom made....not over the counter wheels.
I have found several sets on E Bay with 2 - 17X10 with a 20mm offset packaged 2 - 17X8 with a 25mm offset. So I'm thinking that to get the rears to set with the inside as close to "stock" as possible, I would need 20mm spacers - would require longer studs in the hubs which does not bother me and I may have to "down size the tire width. Not sure the 8" with a 25mm would work up front - I suppose it's only 5mm - to the outside - just not sure if it would sit out too far?
Maybe I'll look at a set of 18's? or stagger 18 front and 19 rear? I keep hearing the cha ching of a cash register! I have not even looked at tire process yet! More work to do.
Guessing a wide 16" rim will have even more issues with hitting the knuckle or perch? I was planning to run some 8.5" or 9" wide rear 16" rims with 275 series tires or so.
It all depends on the offset I think. If you can keep the offset or back space the same as a stock 15" wheel you may be OK but the width of the tire may cause problems? Both on the knuckle and / or the strut and the fender. I have a wide body that's about 3"wider in the rear so I have some room to go outward.
Using the site posted above, If I go with a 275/45/17 on a 17X10 wheel with a 20mm offset (back space is 6.3" which would put the wheel into the knuckle / strut) If I used a 20mm spacer, that would bring the back space back to 5.5" - the stock wheel is 5.2" so I would be .15" closer to the knuckle / strut than the stock wheel. I believe there is enough room. The 275/45/17 tires is 10.8" wide adding another .40" toward the knuckle / strut. I'm not sure there is more than .55" of clearance there?