Are there any of you guys with track cars running the same size tire and wheel with the same offsets on all 4 corners? I would figure that it would help with costs if you were able to rotate or swap tires from front to back or left to right providing they are not unidirectional.If so what sizes and how much body work was necessary to make them fit?
Seasons Greetings To All !!!! Ed

 

You could do that and use a spacer on the rear wheels to make up the extra clearance available in the rear wheel wells. I'm going with a 10 inch wheel and 65 offset on all four wheels. I think I can use about a 21mm spacer on the rears depending upon how big a tire I run.

 

Is that going to require fender mods front and rear?What size wheel 17,18,19...?

 

youll need fender flares in back and front if you want like 18x10s or something like that, they just put 305s up front with no flares on the holbert car with just a few washers to push the fender out a bit.

 

I have 18 x 10's and plan on a 285 or 295 w/o wheelwell modifications.

 

yea, but my race car has the HUGE front fender flares on it... LOVE the balance with non-staggard tire sizes.

 

I have 18x11 for all 4 corners with same offsets, I use a 21mm spacer in the rear for this combo.

 

I have 285/30/18s and have no flares either but thats as wide as you can go in the rear of the OBs without rubbing unless you roll your fenders

 

I am using the 9x16 with 70mm offset (993 rear winter wheels) on all 4 corners that allows swapping the wheels front to back and side to side. You can use 275/45/16, 255/50/16 or 245/45/16 tires.
If you are planning on using 10 inch wheels with 65mm offset up front you will have trouble getting tires much wider than 245. You really need a 75+ mm offset with a 10 inch wheel. They will work fine in the back with a small spacer but will rub with wider tires up front.
I have a set of Kinesis and Etoile wheels that are 17" and I can use them with 27/40/17 all the way around, but they have different offsets front and rear as I got them used.
If I was going to start from scratch I would have all 4 with the same high offset to fit up front and use a spacer in the rear.

Greg Phillips
1986.5 928S track car

 

Colin,What size tires and what offsets on the rims?? Any pics ?Did you have to modify fenders and how much? Thanks.Ed

 

You could do that with 275/35/17's pretty easily on an early car, 295/35/17's will rub on the frame in the front, but they also still work.

 

Ed, they fit on all 4 corners without any modifications, I had already rolled the rear, but I dont think it would have been necessary.

The rims are custom made by a company in my town. Kodiak Racing Rims, Abbotsford BC. I dont have the offsets but I could measure them. I have 285 dunlop medium soft racing slicks on them, I definetly could have gone with wider rubber but I will get roughly 2-3 DE days on it and then I will go with wider ones next time, and this is what they had in stock.

 

I was originally using my 84 5spd car but since that is wrecked,I picked up an 85 5spd car now I have 32 valver instead of 16 valve and am wondering if the body will allow me anymore room because of different model year?18 X 11 sounds awesome and with some metalwork you could go to 305/315 right? And with larger flares go maybe 18 X 12 and say 335?? Offsets will dictate this being possible,so anyone know what the offsets would be to run something that large all the way around? Thanks,Ed.

 

anyone else?or more details?

 

Ed I will get you some more info today on the offsets.

However yes I could run 305 on all 4 corners. would be really tight but doable.

I will probably end up having the rears reshelled to 13" for 335s on the rear and maybe another inch on the fronts.