Confused on wheel size recommendation in manual

[EBarnes]

I'm not sure I am reading correctly regarding the suggested backspacing, and don't want to make an expensive mistake...

I have a Coupe (4 year old kit)
- Track car *
- FFR supplied IRS !
- Roush/Alcon 14" front brakes !!!!
- Front, FFR LCAs.
- Koni's.
- FFR supplied rear Brakes (for now!)

I want to run 315 in the rear, and I am guessing 275-295 up front *

What sized 18" wheels should I be looking at? Thinking 18x10"s and 18x9"-9.5"... What should the backspacing be?

Thanks!
Eric Barnes

[Jim Schenck]

Eric,

I would be looking for a little wider wheels for those tire sizes. For a 315 track tire I would go to an 11 or 11.5 in the rear and for a 275 I would go 9.5 or 10, and at least a 10 if you try and fit 295s up there.

For the coupe:
Rear wheels and non pin drive IRS: 11 inch wheel with 5.75-6.0 backspace
Front wheels for a 275 tire: 10 inch wheel with 5.75-6.0 backspace

[EBarnes]

Yes, non-pin drive IRS. Glad I asked - Thanks!