chrenan

OK guys, I decided on some rims, now I need to think about tire sizes for an 18x8 ET52 and 18x10 ET65 setup. This is for my 87 951.

Any thoughts on what sizes I could run without rolling the fenders? What I could run with rolled fenders? Both width and sidewall experience anyone has would be great to hear.

Thanks

Chrenan

toddk911

I run 225/45 front and 245/40 rear. All Kumho

chrenan

Thanks Todd, and that's on 8" front and 10" rear rims?

toddk911

Yes sir.

Also, I have springs that are about 1.5-2" lower than stock. I do have some rubbing in the front when making very sharp turns but that is it. I never noticed anything visible on the tire after checking when ever I heard some rubbing.

chrenan

Interesting, is that on a 17 inch rim?

I'll be running stock suspension, I was thinking something like 245/35 front and 285/30 rear, but I'm not sure if that is a bit too much rubber to fit. On a positive note, the rolling radius would be exactly 0.49% smaller than stock front and rear with those sizes, so almost identical to stock.

asiancaucasian

I was running that exact offset with 225/40R18 and 285/30R18, no rubbing issues... until I put a 13mm spacer on the rear lol. You can probably get away with 245/35R18 in the front but it'll look a bit bulgy.

blade7

225/40 and 285/30.

chrenan

Well, it seems like 225/40 and 285/30 is the way to go. That will give a 24.73 inch diameter in the rear, and a 25.08 inch diameter in the front, 1.4% difference. Anyone had any trouble with this? ABS issues? I'm assuming its not enough to be a concern?

bw993

I run 245/35 and 285/30 with no rubbing. Also, have run 245/40 and 275/35 with no issues.

mudbuddha

245/40/18 and 305/30/18, only slight rubbing in the rear from full squatting under simulated runs.

mudbuddha

Just realized it's for 8 and 10 in wide rims so I wouldn't go more that 245 in fronts and 285 in the rears.

purple_rado

the rear with that offset i wouldnt do anything less than a 265/35. that offset is ideal for a lot of rubber out back. the fronts you could get away with a 245, but i would run a 225 up front. i have 225 and 255 on my 18's, but because of the offset i cant do much more.

samluke

245 285

asiancaucasian

Just a note OP. If Edmonton roads are even half as ****ty as Calgary's which I assume that they are, you will tram BAD with 245's up front.

JustinL

Tramline is not bad if the suspension is set up decently. I've run all kinds of 245s and 255s and it's very manageable. I mean you can't take your hands off the wheel, but it's tolerable.

Chrenan, like we were talking about at the autocross, I'd go with 245 and 285. Check some tires to make sure you can buy the tires you want in those sizes. Once you get your wheels on, we'll work on the suspension to take some of the understeer out.