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Old 06-12-2008, 12:09 PM   #1
txl146
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Default 245/45/17 on 17.5 width wheel?

Guys, I am considering putting 245/45/17 sized tires on 04 BBS wheel (17 x 7.5). Is 245 width too wide to fit on a 7.5 wide wheel? Thanks.
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Old 06-12-2008, 12:23 PM   #2
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tirerack shows that 7.5" is the minimum width for a 245/45/17 tire, but that size tire is also nearly 1" taller than your stock tire.

any suspension mods?
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Old 06-12-2008, 12:43 PM   #3
txl146
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Thanks.

Here are suspension mods:

AGX/Eibach prokit
Perrin F/R swaybars / endlinks
Rear Cusco strut bar
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Old 06-12-2008, 01:23 PM   #4
thisisthenewsic
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i have the v7 jdm goldies
and i was wondering the same thing
as for they are 17 x 7.5
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Old 06-12-2008, 01:35 PM   #5
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the eibach pro-kit has a pretty low drop so my guess is that it's going to be a tough fit.
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Old 06-12-2008, 02:03 PM   #6
Chris_Lee
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On the sidewall of my 245/40/17 Falken 452's it say do not mount on a 7.5 rim. It really depends on the tire you are getting. You will have to call the place you are buying the tires from and make sure that they will fit your needs.
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Old 06-12-2008, 02:32 PM   #7
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that combination will be fine for winter or off road

NOT for performance
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Old 06-12-2008, 02:33 PM   #8
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Quote:
Originally Posted by Chris_Lee View Post
On the sidewall of my 245/40/17 Falken 452's it say do not mount on a 7.5 rim. It really depends on the tire you are getting. You will have to call the place you are buying the tires from and make sure that they will fit your needs.
bet it says 17.5
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Old 06-12-2008, 02:47 PM   #9
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It will depend on the tire if it is suggested to fit on a 7.5" or 8" wide rim.

Yes, you can use 245 on a 7.5" wide rim.

The 245/45/R17 is not the right size for your car. It will be too tall, and it will both hit the rear spring perch, and you will probably need to roll the fenders. Keep the overall diameter at 25". The 245/45/R17 is 26" tall. 245 is doable though.

How are they not fine for performance?! Wider is better. If it'll fit, wider is a good thing. Grip levels don't rise linearly with the weight load. This means the lowest pounds per square inch you can have on the ground will yield the highest grip levels. Not only that, but temps will stay down and there is more overall rubber to wear through, making tire life higher. Frankly, the only gripe that exists is tire flex, but on a decent performance tire, it's just not that bad. If we're talking about handling, people pretty much don't have a right to complain about handling feel/crispness until they make the effort to upgrade the suspension bushings beyond the stock mush.
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Old 06-12-2008, 03:56 PM   #10
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Quote:
Originally Posted by Arctic Penguin View Post
bet it says 17.5
Your right. I had to run out and check. I get the dumb butt award of the day.
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Old 06-12-2008, 07:24 PM   #11
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Quote:
Originally Posted by Arctic Penguin View Post
that combination will be fine for winter or off road

NOT for performance
haha nOOb why do you want wider tires in the winter?? Narrow is better in the snow less hydro planing effect. The only time you want a wider tire on snow or ice is if you are going across the antartic with endless dept snow and are running with 8psi of pressure.
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Old 06-13-2008, 12:21 PM   #12
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It sounds like people have nothing but trouble with 245/45's....

I have been using Hoosier R6's 245/40's on a 7.5" rim, but can't find any used ones anymore so I am debating going to a 245/45 on the same 7.5" rims.

I have Tein RA circuit coilovers and slightly larger sways (22mm).
Camber is set at -2.5 front, -1.5 rear.
Rolling the rear fenders won't be a big deal if I need to.

Anyone out there running on a similar setup that has had problems with 245/45? I only run the Hoosiers on the track, not auto-x.
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Old 06-18-2008, 11:30 AM   #13
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Quote:
Originally Posted by generalee69 View Post
It sounds like people have nothing but trouble with 245/45's....

I have been using Hoosier R6's 245/40's on a 7.5" rim, but can't find any used ones anymore so I am debating going to a 245/45 on the same 7.5" rims.

I have Tein RA circuit coilovers and slightly larger sways (22mm).
Camber is set at -2.5 front, -1.5 rear.
Rolling the rear fenders won't be a big deal if I need to.

Anyone out there running on a similar setup that has had problems with 245/45? I only run the Hoosiers on the track, not auto-x.
I too have Tein RA - The car used to be slammed (too low-bouncy) but I was never the less able to fit it and use it at track/autocross. The setup was Azenis 245/45 on stock 7.5" rim and had an issue with LR rubbing/leaning hard on spring perch. No issue with RR - The car was slighly higher on the passenger (RR) side (corner weighing) and was able to clear perch. Conclusion, with reasonable ride height, the wheels will fit.

With unreasonable low ride heights, I installed the tires on Enkei 17*8 RPF-1 (45mm offset) and I was able to squeeze it in without rub on LR perch. It was close: <1mm from perch and rolled rear fender.

Since then, I've raised the car and now I am wondering if I can fit 255/40...
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Old 06-18-2008, 02:33 PM   #14
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Quote:
Originally Posted by dasnowman View Post
haha nOOb why do you want wider tires in the winter?? Narrow is better in the snow less hydro planing effect. The only time you want a wider tire on snow or ice is if you are going across the antartic with endless dept snow and are running with 8psi of pressure.
where DO these people COME from
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Old 06-18-2008, 02:42 PM   #15
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Quote:
Originally Posted by Treefallen View Post
I too have Tein RA - The car used to be slammed (too low-bouncy) but I was never the less able to fit it and use it at track/autocross. The setup was Azenis 245/45 on stock 7.5" rim and had an issue with LR rubbing/leaning hard on spring perch. No issue with RR - The car was slighly higher on the passenger (RR) side (corner weighing) and was able to clear perch. Conclusion, with reasonable ride height, the wheels will fit.

With unreasonable low ride heights, I installed the tires on Enkei 17*8 RPF-1 (45mm offset) and I was able to squeeze it in without rub on LR perch. It was close: <1mm from perch and rolled rear fender.

Since then, I've raised the car and now I am wondering if I can fit 255/40...

The car is not unreasonably low I don't think. I can't lower it too much or it won't go onto the trailer.

It sounds like these should work. I might have to roll the fenders (which I am planning on doing now anyway) and raise the rear ride height a little.

Anyone have problems with rubbing on the front with 245/45's on a 7.5 wide rim?
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Old 06-18-2008, 05:05 PM   #16
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Quote:
Originally Posted by Chris_Lee View Post
On the sidewall of my 245/40/17 Falken 452's it say do not mount on a 7.5 rim. It really depends on the tire you are getting. You will have to call the place you are buying the tires from and make sure that they will fit your needs.
That would be why. He asked about 45's.

Moreover, you can still get a 245 40 on there without an issue. Not ideal, but not bad.
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Old 06-18-2008, 09:23 PM   #17
txl146
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Update:

Found a nice set of Michelin 225/45/17 PS2's at a great price.

FYI:
weight of 06-07 WRX wheel with stock RE92 is roughly 45 lbs
weight of 04 BBS wheel and Haka2 winter is roughly 39 lbs
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