06 Evo IX, going to buck up and get slicks for next year. I'm looking for 17x9's or wider to run 285's. I know I need to roll the fenders, etc, but what I don't know is the correct offset.

I'm probably going to get RPF-01's but Tire rack doesn't list 17x9's as available. I don't know if their filter system excludes it for the IX due to an incorrect offset or whatever, but what's the real scoop? Can I get these to fit an evo without roll center kits, and burning up wheel bearings/messing up the track of the car?

 

Why are you wanting to mount a huge 285 on a small 9" rim?


A 9" rim fits a 235-245 about best. 255's will work, but are better on a 9.5".

For a 285, I'd really recommend a 10" rim, or even a 10.5". They'll work on a 9.5" but it's not ideal. But the wider you go, the heavier (and more expensive) things get. Keep this in mind.

Plus, anything wider than a 275 or wearing a 9.5" or larger rim will have potential fitment issues on a IX. Especially if you're going with RPF1's that don't really come with a good Evo offset. Expect a combinations of spacers and rolling/pulling with RPF1's. For this reason, I'm not a big fan on Enkei's.

 

I've got the NT03+M in 17x9.5 and I've run 255s and 275s on them.

I think I got mine with 38 offset as that was the normal offset sold. I think I'd have been better off with the 27 and they have a better look to them too.

I had to add 7mm spacers to get the rear tires far enough away from the front lateral link. I rolled my rear fenders and they fit with little room to spare. In the front I added spacers to match the rear width, but I've got the Seibon wide fenders, so had tons of room.

One thing to keep in mind with the super wide stuff is that you may start to rub on the inner frame rail and routing brake ducting becomes more difficult.

Dave

 

From what little experience I have, high 20s to mid 30s work best for offset. Before you buy wheels though, be sure your tire of choice actually comes in the 285. Last I recall, no slicks come in a 17inch application.

 

This is my first time 'stepping up' to a slick, but it's well overdue. I'm going to be attempting to run SM/STU with the National Hillclimb Association in the 2012 season. They host a 12 race Pacific Northwest Series here.

This year a friend and I participated in a few events, and both of us did pretty good, 3rd and 4th place finishes respectively, but the guys ahead of us were running 275's and 315's on Subi's. Talking with the guys at these events tires really make up the difference in times. I'm on 255 * spec street tires, so I feel there's a good chance for some first and second place finishes.

I've never looked into the realm of real race tires before, so I feel like a noobie all over again after 5 years of being a trackday star.

I do plan on rolling the fenders for the additional width clearances, but I didn't have a clue on how wide of wheel to start with. RPF-01's are obviously out. I wasn't sure if I needed 17x9 or 17x10.

Looks like I started in the right place (Forums with racers) as TireRack wasn't any help at all, they couldn't even tell me what wheel width I needed with 285's.

Thanks all, I'm sure there's going to be more questions to come in this process.

 

You need to run 18's, that is the standard size for comp tires and will open up alot more options, like race take offs.

I would be looking for 18x9.5's, and 285's are tough to fit and will require rear fender rolling, trailing arm grinding, and alot of fender liner work up front. But it can be done. 265's and 275's are much easier to get to work. I've been running 265 for that reason.

 

I agree with Jarrod, go 18x9.5 and get 255/35s on there and you will be good.

 

After doing some reasearch it sounds like 18x9.5's and hopefully a 275. Should be an interesting summer!

 

^^^ yeah - that can be done. Just takes some work. I finally stopped working and just ran 265's.

 

It honestly doesn't take all that much work if you run wheels with the right offset. I have 285/30/18s and the only thing I had to do was roll the rears flat. I have 18x10 +33 rears and 18x11 +10 fronts (you can't fit the 18x11 fronts with stock fenders btw). 275/35/18 is more work than a 285/30 because it's so much taller.

 

+1 to not running 285 on 9.5. I've actually seen this before and the tires bulge a lot. Some people run it in autox, if the tires have a stiff enough sidewall, but it is safer to go with the wider rim.

Anyone actually run 285s on here?

 

285s on a 9.5" is the size most run on BSP/SM Evos at the national level. I run 285 A6s w/ 18x11 front and 18x10 rear.

 

Agree with this. I'm in the process of trying to get my 285s on nto3 9.5" wheels to work. I tried rolling the rears and had rubbing on both front and rear fenders. Sadly it was at the end of the season, but before this year starts, I'm going to roll the rears more and put wider front fenders on my car this year. I'll probably throw some more camber as well.

 

Are you guys actually able to fit 10'' rims under the stock fenders? My track rims are 18x9 right now and no rubbing obviously, but if I step up in size I would rather go to 10'' than 9.5'' if I can squeeze them under the car.

 

I have stock rear fenders and I'm fitting 18x10 +33 with just a roll. IIRC Jarrod (EvoLutionary) used to run 18x10 +32.