G-Series 15 inch wheel options

[brianlay]

Looking for suggestions on aftermarket 15 inch wheels, ideally 8" front & 9" rear. Car is an 86 Carrera and Fuchs doesn't offer the offsets I believe that I need.

Background

For the track I run 8 & 9X16 Fuchs with 225/245 tires. With negative camber and rolled fender lips I've made them work in the front but it is tight. Plenty of grip for a 2550lb/230hp car but on most tracks I never need 5th gear!

For autocross I run 7 & 8X15 with 225 Hoosier A7 tires all around. Makes the car a little loose but the balance is good for autocross and much quicker, especially out of low speed corners. Also, I can rotate tires front to rear as they wear out.

I've tried the autocross wheels/tires on the track a couple of times and the car is quicker but I miss the higher grip of the 245 rears and the tires can quickly overheat (they're A7s).

So my goal is to find some wheels that allow 225/245(or maybe more?) on 15 inch wheels.
I've always preferred Fuchs for the strength and low weight but the available offsets won't work.

Any suggestions?

Thanks
Brian

[Racerbvd]

9x15 Fuchs.. or minilite replicas.

[Bill Verburg]

Originally Posted by brianlay

Looking for suggestions on aftermarket 15 inch wheels, ideally 8" front & 9" rear. Car is an 86 Carrera and Fuchs doesn't offer the offsets I believe that I need.

Background

For the track I run 8 & 9X16 Fuchs with 225/245 tires. With negative camber and rolled fender lips I've made them work in the front but it is tight. Plenty of grip for a 2550lb/230hp car but on most tracks I never need 5th gear!

For autocross I run 7 & 8X15 with 225 Hoosier A7 tires all around. Makes the car a little loose but the balance is good for autocross and much quicker, especially out of low speed corners. Also, I can rotate tires front to rear as they wear out.

I've tried the autocross wheels/tires on the track a couple of times and the car is quicker but I miss the higher grip of the 245 rears and the tires can quickly overheat (they're A7s).

So my goal is to find some wheels that allow 225/245(or maybe more?) on 15 inch wheels.
I've always preferred Fuchs for the strength and low weight but the available offsets won't work.

Any suggestions?

Thanks
Brian

Fuchs does not have the correct o/s for 15s in the 8 & 9 sizes you want

Braid does, probably some other custom wheels makers too

in front you want 8ET27, but ET25 to 30 work but are just are a bit more compromised one way or the other, tire would probably be 225/45

in back 9ET15 is a great fit but down to ET11 or so also works depending on the tire and suspension setup, ideally, for a performance application, 9.5ET19 would be used(very little wiggle room here) tire 245/40

[Bill Verburg]

You don't ay what tires you are using but here's a comparison of 2 relevant 100tw track oriented tires left is 16 right is 15, besides increased grip you gain over 27lb-ft in the acceleration dept. w/ the 15s, wheels weights for the 15s are estimates based on the same widths in 17s

[brianlay]

Currently have Hoosier R7 225/50-16 and 245/45-16 on 8&9 Fuchs for the track. Have also used Toyo RR in the past in the same sizes, not as much grip but last a lot longer!

I was thinking I would use 225/50-15 and 245/40-15 Hohos on 8 & 9 15 inch wheels

Remember one of my goals is to drop the gearing by going to 15s

the 245/40 really wants a 9 inch wheel, I guess the 225/50-15 could use a 7 but would be happier on an 8

my current autocross A7 fronts are 225/50 on 7 and they seem a little pinched. 7X15 Fuchs are widely available.
Is going to an special order 8X15 on the front going to be worth it?

[Bill Verburg]

HoHO to HoHo the torque gain is even more dramatic, ~42lb-ft
yes the 16 115/45 & 245/40 want 8 & 9
the 15 s 225/45 & 240/40 want 8 & 9.5, though yes you could use7&9 or 8 & 9

[brianlay]

Thanks Bill!

You've validated what I suspected.

[Racerbvd]

Did you see these??
https://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1094144-2-bbs-15x9-wheels-fs.html

[brianlay]

Thanks Byron I had not seen that.