You can use $3800worth of brakes you already have ordered.

Learn why RB Aluminum caliper kits are different from others.


This brake kit will fit most 17" wheels with the exception of 17” Enkei RPF1 wheels.

 

lol, didn't pay anywhere near that price


Plus I'm not running Daytona or Lemans. I'm running low speed autox on street compound tires and street compound brake pads. Despite what you read in their competitors marketing advertisements, I've run this RacingBrake package before and have no hesitation of doing so again. Not to mention losing almost 30 more pounds of unsprung weight.

 

Where is the cheapest place to buy 17x9 RPF1s?

 

Just find a used set somewhere. Check out the Evo forums, the 17x9 sell pretty frequently over there.

 

Did a search over there and none come up for months and months. Also been looking on here and NASIOC without much luck. I think Chike was looking everywhere also and just ended up buying new.

 

I'll send you a pm. I found a place that has them for $200/ea brand new (17x9 in either the +35 or +45 offset).

 

I have also considered trying this... putting 255/40/17 Star Specs on a 17x8 wheel. What is the disadvantage of this setup? I've always been curious about the ups and downs of a wide or narrow wheel matched with a wide or narrow tire, and their affect on autocross. If any of you gurus could enlighten me, I'd really appreciate it!

 

The rough rule of thumb, from that ever-present source of street tire wisdom, Andy Hollis, is that once the tread width becomes more than 1 inch wider than the rim, you are just carrying extra weight.

So, for a rim that is 8" wide, anything more than 9" of tire is a waste of money & will actually be slower (due to greater rotating weight) than a 9" wide tire.

Of course, this is just a rule of thumb, and nobody knows for sure where that point of diminishing returns is on a 17x8 setup for an STX RX-8.

From a practical standpoint, sticking too much tire on a too-narrow rim affects turn-in, and the car could feel sloppy in the slalom. You may find yourself adding pressure to componsate, which reduces tread patch and will probably limit sweeper speed.

So, you could do it, but it is possible that a narrower tire would actually be faster.

 

And, looking at tire specs, most 255/40-17s have 9" or a bit more tread width, so by that measure you are probably not doing yourself any harm by going for the 255s on the 8" rim (other than, of course, acknowledging that a 9" rim would be better).

 

Bump this Old thread, wil 17X9 35mm with 255/40/17 fit without rolling the fenders?


Thanks,

Simmons

 

While I've not personally tried a 35mm et the 45mm et I used with 255s had plenty of room.



http://4d-sport.com/projectcars/2009ciscosticksrx8.html

Barry - back to stock

 

10" wheels with 285/30 fit, it wouldn't hurt to search and learn ....

 

There's still some room with 285/30x18s on 18x9.5s 45mm et:



but 265/35x18 on 18x10.5s 38mm with -1.2 degrees rub on my car

 

I meant to say 10.5, with +43 they fit fine

The 10" I also have are +52

The size being asked about has been well discussed. I personally don't subscribe to the low offset theory, but to each their own ....

 

Hey Mark,

Remember these (anodized centers to protect the innocent )?



Also, I still have the A6s Debbie won the Nationals with (I'm convinced there's another win in them )

Barry

 

And for a fifth and sixth data point that's not specifically what you're looking for...

I ran 245/40/17's on 17x9.5 +35 RPF1's with no rubbing. I also have 265/40/17 Direzzas on 17x9 +45 5Zigens that rub the control arms at full lock but don't disturb the fenders.

 

Thanks, I am going to find out after work today.

I have 17x9 35 offset enkei rpf1. And 255 /40/17 dunlops.

Simmons

 

Just roll and don't worry about rubbing!!
17x9 +28 Work Emotion CR Kai 255/40 R-S3 is what I am running this season.

Last season was with 245/45 XS. I don't know what I was thinking with truck tires! Ha Had so much flex.

 

Trevors what is the total weight of the wheel and tire? Works are somewhat on the heavy side...

 

have not weighed...Probably around 35lbs though

 

I'd say they are closer to 40lbs...

 

Your probably right. I will figure it out when my R-S3s come in.

 

My co-driver's secrets are no longer safe...

 

you still have to drive regardless

 

What does that have to do with STX wheels?