Hi was looking for some help with some wheel and brake fitment I've searched a few times couldn't find the answer. Does anyone happen to know if a Advan RZ 17x9 +35 will fit the J's Racing BBK in the front?

 

It should, but the bigger problem is getting your front fenders to accommodate that wheel with the minimum recommended 225/45 tire. That's going to be a big pull and a lot of camber. And if your going for a BBK I assume there is tracking that will be taking place, so a little more then a 225 up front would probably be appreciated. If not tracking, I hear Brembo makes a plastic facade that slips over the factory calipers to get the same dope looks

 

225 on a 9" wheel? Is that a typo? Do you mean 255? 17x9 +35 w/ at least a 245 tire you'll still need a good roll and flare front and rear + aggressive camber.

 

I said at the minimum spec yes 225. Trying to lay out the best case scenario for fitment without being ridiculously compromised. And no, a 255 on a 9" wheel isn't an ideal fitment, though its a fine one. 255 on a 10" would be the best however - If your looking for best grip and sharpest handling out of that width tire that is. A 225 will preform better on a 9" wheel then it will a 8" or even an 8.5. Don't forget to examine the baseline compromise here, which is a 9" +35. So yeah, the baseline is flawed to begin with. A 255 just isn't going to fit/work. And not everyone wants to run a square set up either. 245 would be more ideal for the rim width typically, but not if it wont fit. I wouldn't run a 9 +35 up front nor in the rear if it were me. You know what I run.

 

The 225/45/17 in a Michelin PSS, which has a recommended rim width no greater than 8.5"

http://www.tirerack.com/tires/tires....omCompare1=yes

I really dont understand the affinity for stretching skinny tires on wide rims nowadays, nor would I want to stagger tires on a set of nonstaggered wheels. Then your sidewall angles will be mismatched in turn.

IMO, if you dont wanna go square, don't buy a square set of wheels.

Your setup is still within manufacturer spec...barely

http://www.tirerack.com/tires/tires....omCompare1=yes

 

I thought we have been over this numerous times in this forum already?

Besides a PSS isn't an extreme performance summer or r compound tire. Its compromised and it runs narrow as a result. No one cares about maximum performance if they are running a PSS. Its not a popular test choice at the track when making accurate conclusions about what works optimally. I will say once again, a matched rim width to tire width to the nearest mm, is the optimum performing combination. Ideally you would select a tire width first, and match the corresponding rim width to that tire. We do it backwards on the "street", because fitment always seems to take president first and tires second. But that doesn't make it right.

Shop the tire your going to run, and match the corresponding max width rim to that specific tire. If the tire runs 10.2mm wide, then it gets a 10" rim. that generally is a 255 spec tire. If it runs 9.6" wide, then it gets a 9.5" wide wheel and that is generally a 245 etc etc. This is race track proven. It wont steer you wrong in any dry traction environment if you want to exude the most possible performance out of your tire selection. And tire performance is the #1 way to go fast, everything else is secondary. Build the car around the tire!

 

"Build the car around the tire!"

+

"fitment always seems to take precedence first and tires second. But that doesn't make it right." -Couldn't agree with this more.

I was looking at the 225/45/17 Hoosier R7s though...max rim width recommended is still at 8.5", although the 225/40/17 can go all the way to a 9.5" rim. Section width is nearly the same measurement as well.

 

Just have to shop the width spec, and go off of that. Tread and section width measurements are all over the place, but about half of the 225/45/17 in extreme summers do recommend up to a 9", some Just a 8.5. There are fluctuations between wheel diameters too. Many shorter profile tires dont need/require the same pull to maximize the entire tread width and sidewall profile. This is where you use the recommended rim width loosely and actually go off the tire measurement spec given. They dont always seem to coincide with one another consistently for seemingly no common sense reason. Generally the wider the tire is, the more crucial/beneficial the maximum width wheel mate comes into play, just because there is so much distance between sidewalls, more flex/deformity can come into play, as well as grip forces obviously, so getting the absolute best sidewall support, profile, shape is going to be key. When you get into the 255's+ utilizing a 10" wheel vs a more common 9" is going to see much improved lap times. The Miata guys figured out that 9" wheels mated to their 225's were consistently faster. Even if they weigh more.

Best case scenario/

275/285 gets a 11"

295 11.5"

315 gets up to a 12.5"

and so on...