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      12-14-2012, 01:31 PM   #1
smpl3
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OE 18's, upgrade to wider rear tires...

Looking to change the OE tires. The car came with OE 18'" BMW wheels, front tires- 245/40 and rear tires- 265/40 Mich PS2.
For the rear ratio, is a 275/35 tire (Michelin SS) the correct upgrade size?
Thanks
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      12-14-2012, 02:13 PM   #2
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From my quick calculations, the optimal one is a 275/40 18, not the 275/35.

stock 265/40 is 26.35" tall
275/35 is 25.58" tall
275/40 is 26.66" tall

Far less varience with the 40 aspects. I have the 275/40 18's (PS2s) on my rear.
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      12-14-2012, 02:31 PM   #3
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Why not just stock with oem sizes on oem wheels?
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      12-16-2012, 02:10 PM   #4
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Quote:
Originally Posted by schnell325 View Post
From my quick calculations, the optimal one is a 275/40 18, not the 275/35.

stock 265/40 is 26.35" tall
275/35 is 25.58" tall
275/40 is 26.66" tall

Far less varience with the 40 aspects. I have the 275/40 18's (PS2s) on my rear.
You are correct, the 275/40's are the way to go. Thank you!



Quote:
Originally Posted by gatorfast View Post
Why not just stock with oem sizes on oem wheels?
I was curious to see the cost difference and maybe get a few millimeteres more performance. The stock size, 265/40 rears is probably what I'll get.
Thanks for the input!!
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      01-19-2013, 05:50 PM   #5
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Quote:
Originally Posted by schnell325 View Post
From my quick calculations, the optimal one is a 275/40 18, not the 275/35.

stock 265/40 is 26.35" tall
275/35 is 25.58" tall
275/40 is 26.66" tall

Far less varience with the 40 aspects. I have the 275/40 18's (PS2s) on my rear.
bump!

Did you also go wider on the fronts?

I'm going to need new tires sometime this spring..

Thanks!
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      01-20-2013, 03:03 PM   #6
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Quote:
Originally Posted by admranger View Post
bump!

Did you also go wider on the fronts?

I'm going to need new tires sometime this spring..

Thanks!
Not as of yet. For some odd reason my rear tires wear out 3 times as quick as the fronts.

I do run 265/35 18's on apex arc-8 wheels for auto-x on the front though. But for my street tires I still use the stock OEM tire size.
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http://5252motorsports.blogspot.ca/2...3-sleeper.html
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      01-20-2013, 08:42 PM   #7
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Quote:
Originally Posted by schnell325 View Post
Not as of yet. For some odd reason my rear tires wear out 3 times as quick as the fronts.

I do run 265/35 18's on apex arc-8 wheels for auto-x on the front though. But for my street tires I still use the stock OEM tire size.
It's a mystery to me why the rears would wear out faster. Time for a class action lawsuit!

265/35's might be the ticket... I'll have to look at that for a stock front wheel...
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      01-21-2013, 10:01 AM   #8
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Will 275/40's fit? I'd just do 275/35s.
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      01-21-2013, 12:43 PM   #9
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Quote:
Originally Posted by bigjae1976 View Post
Will 275/40's fit? I'd just do 275/35s.
On the front? Hell no, on the rear there's room to do all kinds of wacky stuff, there's TONS of room but the front is only going to handle about a 26" tire before it starts to wear out the fender liners

I'd go 255/40 with 275/40 in the rear, the 265/35 is more than 1" shorter than the rears when paired with a 275/40 and that's a big split
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      01-21-2013, 08:47 PM   #10
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Quote:
Originally Posted by Richbot View Post
On the front? Hell no, on the rear there's room to do all kinds of wacky stuff, there's TONS of room but the front is only going to handle about a 26" tire before it starts to wear out the fender liners

I'd go 255/40 with 275/40 in the rear, the 265/35 is more than 1" shorter than the rears when paired with a 275/40 and that's a big split
Thanks Richbot. 255/40/18 and 275/40/18 it is.

I'll be burning off the PS2's later this spring at the San Diego Chapter driving school.
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      06-05-2013, 08:03 PM   #11
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Quote:
Originally Posted by admranger View Post
Thanks Richbot. 255/40/18 and 275/40/18 it is.

I'll be burning off the PS2's later this spring at the San Diego Chapter driving school.
Did you ever get these....and any pics if you did?

The sidewall on the 275/40 sounds really beefy
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      06-09-2013, 12:17 AM   #12
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Quote:
Originally Posted by sensi09 View Post
Did you ever get these....and any pics if you did?

The sidewall on the 275/40 sounds really beefy
Unfortunately, no.

I went with RE11's in 245/40 and 265/40. I love these tires and they didn't come in the larger size... Both M3's have the RE11's on them. Now if they'd just make the sizes for the 19's on the X5...
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      06-15-2013, 10:00 PM   #13
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Quote:
Originally Posted by admranger View Post
Unfortunately, no.

I went with RE11's in 245/40 and 265/40. I love these tires and they didn't come in the larger size... Both M3's have the RE11's on them. Now if they'd just make the sizes for the 19's on the X5...
Re11 is in sale now too.

Good info here. I like more tire options, we're very limited in 245 265 combos. 255 275 is also limited, but gives us choices.
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      06-16-2013, 05:08 PM   #14
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Quote:
Originally Posted by mdosu View Post
Re11 is in sale now too.

Good info here. I like more tire options, we're very limited in 245 265 combos. 255 275 is also limited, but gives us choices.
I would have done the RE-11s in stock sizes, but they were gone. Hard to pass up on the cheaper PSS and longer tire wear though.
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      06-16-2013, 09:33 PM   #15
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Quote:
Originally Posted by sensi09 View Post
I would have done the RE-11s in stock sizes, but they were gone. Hard to pass up on the cheaper PSS and longer tire wear though.
True. PSS blow for the track though, if you're into that kind of thing. Sidewall is butter soft (the tire guys love mounting them they are so soft it is very easy to do).
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