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18x9.5 w/285x30x18 on FD

Old 10-17-07, 08:42 PM
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18x9.5 w/285x30x18 on FD

Has anyone here autox'd with this combination of wheel and tire?

These will fit (with the proper offset) according to the FD wheel fitment spreadsheet.

But fitting and working well are not necessarily the same thing.

Just wondering if anyone has run into issues racing this size wheel and tire in an FD with stock fender wells.
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Old 10-24-07, 09:34 PM
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To give you some extra data, our car runs 285/30/18 A6 Hoosier front on 10.5 inch wheels with rolled fender lip and 2 1/4" coilovers at 2.4 degrees camber with no problem. I am thinking on going to 11" wheels as camber will be 3 degrees with adjustable upper arms next year.
The rear has 315/30/18 A6 Hoosiers on 10.5 inch wheels. Again, with rolled fender lip and 2 1/4" coilover. The rear longitudinal trailing arm is aftermarket, and moved inboard as far as possible. The tires still rub the arm, inner fender well and outer fender lip, just barely under 1.35G loads. It is amazing how much the tire flexes under load, as the static clearance to the trailing arm is about 1/2". Tried to go to an 11" wheel and the stretched tire was just a little to big. If you are running 285's on the rear, you should have no problem on clearance.

Erik Strelnieks
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Old 10-24-07, 11:36 PM
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To echo Erik, those should fit. I ran some 18x9.5's with 285/30 Hoosiers (S03's) a few years ago and they fit front/rear without any issues. You might have to work with the fender liner attachment for the fronts, but should be minor. That was with SSR 18x9.5 (I think they were +38 offset).

-Andy M.
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Old 10-26-07, 06:29 PM
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Thanks for the input!
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Old 10-27-07, 07:59 AM
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Hi,
Erik, what wheels are u running?

jkstill: I have some "borrowed" 18x10 CCW wheels with tall 285 Pirelli slicks, and I was surprised how well the fenders swallowed in those tires. No rubbing anywhere so far, shaved rear lips.
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Old 10-29-07, 03:57 PM
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I bought SSR comps 18x9.5 +50mm all around and plan to run 285/30/18 v710 all around next season. If Andy and Erik could write back with their heights from bottom of fender to floor, that would be awesome I was at 26 inches this season, but will be 25 front, 25.5 rear next season, approx, depending on corner weight results.
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Old 10-31-07, 08:58 AM
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Echo of Andy and eric: I run 9.5x 18 Enkei RPF1s +38 all around with 285/30R18s road course and autox with Tokicos and the Ground Control coilover kit. I had to roll both the front and rear lips and adjust liner mounting as mentioned but since then no issues. I am not running significant camber so that may be why I had to roll both ends. I have not run stickys yet so I do not know if they would present addisional issues.

Chris
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Old 11-07-07, 11:09 PM
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Originally Posted by Taz View Post
Hi,
Erik, what wheels are u running?

jkstill: I have some "borrowed" 18x10 CCW wheels with tall 285 Pirelli slicks, and I was surprised how well the fenders swallowed in those tires. No rubbing anywhere so far, shaved rear lips.
CCW's also!
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Old 11-07-07, 11:14 PM
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Originally Posted by 2MCHPWR View Post
I bought SSR comps 18x9.5 +50mm all around and plan to run 285/30/18 v710 all around next season. If Andy and Erik could write back with their heights from bottom of fender to floor, that would be awesome I was at 26 inches this season, but will be 25 front, 25.5 rear next season, approx, depending on corner weight results.
24 5/8" Left Front (285/30/18)
25 1/4" Left Rear (315/30/18)

There is a 0.7" diameter difference between the 2 sizes.
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Old 11-24-07, 11:27 PM
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Thanks for all the input.

18x9.5 38mm RP-F1's with 285/30/18 V710's are on order.
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Old 11-25-07, 05:20 PM
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jkstill - i think the 38mm with the 285 will be very close on stock fenders. have you confirmed they fit? i don't think they will fit stock fenders. i bought 50mm's for next season but don't have tires yet.
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Old 11-25-07, 06:09 PM
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can't edit above post but here is a pic i took when i tried putting 17x9.5s +42mm with 275's:

http://209.177.55.37/images/rx7/275s...s/IMG_2859.jpg

26" ride height and i was too concerned about rubbing so i never tried it.
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Old 11-26-07, 10:26 AM
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Originally Posted by 2MCHPWR View Post
jkstill - i think the 38mm with the 285 will be very close on stock fenders. have you confirmed they fit? i don't think they will fit stock fenders. i bought 50mm's for next season but don't have tires yet.
Please see previous posts. Planning to roll the fenders.
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Old 11-26-07, 10:29 AM
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Originally Posted by 2MCHPWR View Post
jkstill - i think the 38mm with the 285 will be very close on stock fenders. have you confirmed they fit? i don't think they will fit stock fenders. i bought 50mm's for next season but don't have tires yet.
Close is ok. Others have confirmed doing this with stock fenders, albeit with some fender rolling and liner mounting adjustment. There's a liner mounting screw that will give clearance issues. I'll figure out how to deal with that when I see it.
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Old 12-03-07, 12:24 AM
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Originally Posted by jkstill View Post
Close is ok. Others have confirmed doing this with stock fenders, albeit with some fender rolling and liner mounting adjustment. There's a liner mounting screw that will give clearance issues. I'll figure out how to deal with that when I see it.
Got the wheels this week. I put one on the front just to see how it looks.

The angle of the picture exaggerates it a bit - the tires stick out about 3/4 of an inch on the stock fender.

2.5 degrees of camber and rolling the fender should take care of it.
Attached Thumbnails 18x9.5 w/285x30x18 on FD-img_0113-medium-.jpg   18x9.5 w/285x30x18 on FD-img_0114-medium-.jpg  
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Old 12-03-07, 09:25 PM
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sweet. pls post more that **** looks like it is sticking out five inches LOL . i have a black fd too. are you gonna roll the fenders yourself? kvn
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Old 12-03-07, 10:56 PM
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Planning to roll the fenders myself.

There's a local guy that will rent me his Eastwood Fender Roller


Have to make serious progress on some other projects though before doing much more with my car.
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Old 12-12-07, 04:27 PM
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any updates
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Old 12-12-07, 06:21 PM
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Originally Posted by fd3virgin View Post
any updates
Sorry, no.

I have a research project and presentation to put together before I can do an more serious work on the car.

Though I did make a camber measuring tool from 10 inch Craftsman laser level, Riv-nuts, set screws and a piece of pre-drilled angle steel.
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Old 09-14-08, 06:10 PM
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Originally Posted by fd3virgin View Post
any updates
Warning: Old thread resurrection!

The fenders were rolled, the wheels installed, car aligned.

After a couple of events to learn how to drive the car again, it was indeed fast.

Some pics: http://s532.photobucket.com/albums/e...pt%207%202008/
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Old 09-17-08, 10:16 AM
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can you please take a closer pic of the set up (rims tires and rolled fenders.) i cant really tell from the autocross pics.
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Old 09-17-08, 11:17 PM
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Originally Posted by ZumspdRX-7 View Post
can you please take a closer pic of the set up (rims tires and rolled fenders.) i cant really tell from the autocross pics.

I'll get one when it comes back down off the jackstands.

Had the wrong P/S fluid in and had to change it.
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Old 09-17-08, 11:57 PM
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Originally Posted by ZumspdRX-7 View Post
can you please take a closer pic of the set up (rims tires and rolled fenders.) i cant really tell from the autocross pics.
Found one.
Attached Thumbnails 18x9.5 w/285x30x18 on FD-img_5961-medium-.jpg  
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Old 09-19-08, 07:47 AM
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thanks. did you roll your fenders?
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Old 09-19-08, 10:32 AM
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^^^
Please read the rest of the thread.
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