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Old 10-27-2008, 07:07 PM   #1
HSBabyFace
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Default Tires 235/45's or 245/40's

I just got a set of 17x8 48 offset rota torques and I am debating between 235/45's and 245/40's. I want to know if anyone has had any rubbing issues with the 245 or if anyone has any recomendations. As far as suspension goes Ive got the Eibach Pro springs. Thanks
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Old 10-27-2008, 09:24 PM   #2
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245/40's worked fine with me -2 camber on front (plates) -1 on back (bolts). lowered on cusco zero 2r coilovers
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Old 10-27-2008, 09:26 PM   #3
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Quote:
Originally Posted by ChuiSTi View Post
245/40's worked fine with me -2 camber on front (plates) -1 on back (bolts). lowered on cusco zero 2r coilovers
I concur as well, mine work great with this size tire.
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Old 10-28-2008, 02:42 AM   #4
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I could be wrong but I think the rear fenders are rolled more from the factory on the 05+ sti then the wrx. ?

Someone please correct me if im wrong.
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Old 10-28-2008, 05:15 PM   #5
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Quote:
Originally Posted by HSBabyFace View Post
I just got a set of 17x8 48 offset rota torques and I am debating between 235/45's and 245/40's. I want to know if anyone has had any rubbing issues with the 245 or if anyone has any recomendations. As far as suspension goes Ive got the Eibach Pro springs. Thanks
i have the exact same rims with 225/45 on sti springs. the rear struts clear by about 8mm
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Old 10-28-2008, 05:40 PM   #6
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235/40 or 245/40

will not rub unless it is slammed
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Old 10-28-2008, 06:09 PM   #7
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Quote:
Originally Posted by rexworx View Post
I could be wrong but I think the rear fenders are rolled more from the factory on the 05+ sti then the wrx. ?

Someone please correct me if im wrong.
Yes, you are correct. You can see the rear fender flares on a 05-04 STi

If you have a sedan you should be fine. If you have a wagon, you'll rub.
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Old 10-28-2008, 07:05 PM   #8
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Thanks for the help. I've decided to go with the 245/40 Potenza RE760 sports. Looking to get them put on this weekend.
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Old 10-28-2008, 10:14 PM   #9
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I have 245/40 on 17x8 +48 wheesl (not Rotas) and it used to rub in the rear. I rolled the fenders with a pipe.

They won't rub "all the time" but when you corner hard, hit bumps, or load up the trunk, I bet it's going to rub. May depend a bit on the tire used. I have Hankook RS-2s.
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Old 10-28-2008, 10:49 PM   #10
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Quote:
Originally Posted by Gonz View Post
I have 245/40 on 17x8 +48 wheesl (not Rotas) and it used to rub in the rear. I rolled the fenders with a pipe.

They won't rub "all the time" but when you corner hard, hit bumps, or load up the trunk, I bet it's going to rub. May depend a bit on the tire used. I have Hankook RS-2s.
your car and the OP's car are NOT the same
the 06-07 wrx have more room in back and can run wider tires without rubbing

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Old 10-29-2008, 09:02 AM   #11
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Quote:
Originally Posted by Gonz View Post
I have 245/40 on 17x8 +48 wheesl (not Rotas) and it used to rub in the rear. I rolled the fenders with a pipe.

They won't rub "all the time" but when you corner hard, hit bumps, or load up the trunk, I bet it's going to rub. May depend a bit on the tire used. I have Hankook RS-2s.

also aren;t bugeyes fendors smaller?
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Old 10-29-2008, 06:26 PM   #12
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Quote:
Originally Posted by Uncle Scotty View Post
your car and the OP's car are NOT the same
the 06-07 wrx have more room in back and can run wider tires without rubbing
Quote:
Originally Posted by bmak21 View Post
also aren;t bugeyes fendors smaller?
Thats what I thought too... Only thing Im really worried about is swallowing the wheel. One of the reasons I want a wider tire is to protect the wheel from parking in the city. Also to put a little more rubber to the ground I just want to make sure that the 245's aren't going to look odd.
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Old 10-29-2008, 10:14 PM   #13
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Didn't know 06s were different than 02s. Guess it's the newb in me coming out

If you want to protect the rim from the curb, you can look for a tire with a rim protector bead too.
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Old 01-20-2009, 09:48 PM   #14
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Not to bump an old thread but I have 245/40 Sumitomo HTR Z III on 17x8 Boosts on my car. I have not experienced rubbing yet. Im dropped on Tanabe DF210s with Tokico Dspecs.
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Old 01-20-2009, 10:12 PM   #15
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I like 40 series in both 235 and 245 on 17's. I noticed a slight increase in acceleration coming from 235/40/18 to 235/40/17.
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Old 01-20-2009, 10:21 PM   #16
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^^^ Interesting about the increase in acceleration cause I notice a decrease when I stepped up from the stock 215 to a 235


I ended up with 235/45's but am now selling the whole set up Got a ticket and need the money to help pay. But im going to end up getting some 17x9's with 245/40's next hopefully this summer.
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Old 01-20-2009, 11:45 PM   #17
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For a 17x8 wheel I tend to recommend 225/45/17, 235/40/17, or 245/40/17 tires. It all depends on what you plan to do with the car, type of tires, etc..


Quote:
Originally Posted by HSBabyFace View Post
^^^ Interesting about the increase in acceleration cause I notice a decrease when I stepped up from the stock 215 to a 235
It all depends on your overall rolling diameter.

When Grippy went from a 235/40/18 to a 235/40/17 his overall rolling diameter decreased by a full inch. The 235/40/17 being a shorter overall diameter will make the car quicker given the same gearing.

When you went from a stock 215/45/17 to a 235/45/17 you increased your overall rolling diameter by .7" which will make it so your wheel rotates less per mile, making acceleration slightly slower.

-Dan
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Old 01-21-2009, 10:02 AM   #18
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according to this site http://www.rims-n-tires.com/rt_specs...0&text1=&text2
it will change only by 2.8%. So i don't know how you could feel such small the difference going from 215/45/17 to 235/45/17 tyres...
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Old 01-21-2009, 10:46 PM   #19
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Originally Posted by suby_dude View Post
For a 17x8 wheel I tend to recommend 225/45/17, 235/40/17, or 245/40/17 tires. It all depends on what you plan to do with the car, type of tires, etc..



It all depends on your overall rolling diameter.

When Grippy went from a 235/40/18 to a 235/40/17 his overall rolling diameter decreased by a full inch. The 235/40/17 being a shorter overall diameter will make the car quicker given the same gearing.

When you went from a stock 215/45/17 to a 235/45/17 you increased your overall rolling diameter by .7" which will make it so your wheel rotates less per mile, making acceleration slightly slower.

-Dan
Yeah I asked some people about that when I first put the wheels and tires on about my car feeling slower and I got a lot of people thinkin I was crazy. But the physics makes sense. I am going to end up getting a set of 17x9's and 245/40's
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Old 02-24-2009, 01:46 PM   #20
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I'm thinking of picking up a set of Rota 17x8 +48 and would like to know the max I should go without rubbing. I'm on Dspec struts with jdm pinks with no fender rolling.

I'm thinking 235/45/17. Anyone?
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Old 02-24-2009, 05:22 PM   #21
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i was rubbing in the back with 235/45.. fronts were fine
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Old 02-24-2009, 08:49 PM   #22
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Originally Posted by jondl View Post
I'm thinking of picking up a set of Rota 17x8 +48 and would like to know the max I should go without rubbing. I'm on Dspec struts with jdm pinks with no fender rolling.

I'm thinking 235/45/17. Anyone?
nope. no way. not with stock rear fenders. you'll probably rub with 235/40s too. 225/45 if you want to be safe, or roll your rear fenders and go with a 245/40.
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Old 02-24-2009, 08:54 PM   #23
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nope. no way. not with stock rear fenders. you'll probably rub with 235/40s too. 225/45 if you want to be safe, or roll your rear fenders and go with a 245/40.
Thanks for the quick responses guys. I guess I'll have to spend the extra cash for the 245/40/17. The RE01R deals got me.
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