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Wheels and Tires Discussion of different brands of tires, sizes and wheels.

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View Poll Results: What size is better for M3 17 wheels on a 318i
225/45/17 4 57.14%
215/45/17 3 42.86%
Voters: 7. You may not vote on this poll

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Old 07-17-2008, 03:15 AM   #1
FATHER
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Default 215/45/47 or 225/45/17 and WHY?

well guys the topic is the question, and why, i have two options, the wheels are M3 17"
http://www.bmwtips.com/tipsntricks/w..._wheel_067.jpg

Please help me to take a decicion.
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Old 07-17-2008, 04:24 AM   #2
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225/45 is the proper size for the E36.
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Old 07-17-2008, 05:34 PM   #3
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Actually, 215/45 is supposed to give you almost the same overall diameter as the stock ti tires. 225/45 is a bit bigger. I just had 225/45 mounted and it's a couple inches bigger than my stocks. . .though my original tires are a pretty worn now that I think of it. . .
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Old 07-17-2008, 05:36 PM   #4
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45 sidewall looks a little big on these cars... i say 215/40
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Old 07-17-2008, 07:08 PM   #5
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I say 215. They'll be close enough in diameter and the slightly narrower tire will help your MPG a tiny bit. That width is plenty of tire for the ti.
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Old 07-17-2008, 08:02 PM   #6
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I say 235/45/17

That's what I have on my car now


Quote:
Originally Posted by bullmand View Post
I say 215. They'll be close enough in diameter and the slightly narrower tire will help your MPG a tiny bit. That width is plenty of tire for the ti.
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Old 07-17-2008, 08:03 PM   #7
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Quote:
Originally Posted by Philly View Post
45 sidewall looks a little big on these cars... i say 215/40
You won't say that when you hit a pothole, and your tire survives.
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Old 07-17-2008, 08:05 PM   #8
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go for 205-40-17s!

(or 215-40-17, if you really need so much of the side wall)

stock M3 are 225-40-17s

Quote:
Originally Posted by FATHER View Post
well guys the topic is the question, and why, i have two options, the wheels are M3 17"
http://www.bmwtips.com/tipsntricks/w..._wheel_067.jpg

Please help me to take a decicion.
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Old 07-17-2008, 08:37 PM   #9
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I suggest either 225/40 or 215/45.
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Old 07-17-2008, 09:14 PM   #10
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Quote:
Originally Posted by L84THSKY View Post
You won't say that when you hit a pothole, and your tire survives.
I live in pothole heaven, trust me... and owned 4-5 sets of 17"s in the past couple years... I know what Im talkin about
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Old 07-18-2008, 12:11 AM   #11
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Ok i install 215/45/17 in michellin, lokks very similar that the o;d ones 225/45/17, THANKS GUYS FOr YOUR HELP
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Old 08-10-2010, 09:53 AM   #12
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Glad I did a search before asking the same sort of question.

I'm going from 245/45/17 to 215/45/17 with M3 DSII's, so this makes me feel a little more comfortable knowing that 215/45 is a better balance in terms of keeping the OEM diameter.

245 are a bit too beefy for my Ti I see.

I'll ask here before another search and posting a fresh question:

Will 215 all around also help with rear inner tire wear? 245's were just wearing out on the inside of my rear tires, maybe too wide? Doing an alignment by the way so hopefully its not something to with worn bushing in the rear, although if I need to replace, I'll do it.

A BMW only shop owner dude looked at my 245/45/17's and said that they should be 40 because 45 confuses or gives the transmission speed thing a mis reading of speed, something along those lines, I'm a newbs, but I'm wondering if thats true or a real issue?

I'd hate for the tires being 45 affect the tranny or something else in the long run. Maybe its resulting in inaccurate mileage then as well? Sorry for my green questions. Just wanting a good balance of performance, and OEM spec adherence if I can call it that.

The mechanic doing the job is also a BMW/Porsche, etc shop, experienced and says its no difference in 45 to 40 and vice versa, its got me scratching me head a bit. Getting new tires so I sort of need to know.

Also hoping 215 on DSII's don't look too, you know, whimpy or slender... that's my ti-vanity kicking in!

Thanks!
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Old 08-10-2010, 12:56 PM   #13
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215/40
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Old 08-10-2010, 07:43 PM   #14
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Inner rear tire wear due to age and slowly the plates toe-ing out. Just a note, confirmed by two BMW shops with no info given that I knew that was the problem in a way from a previous alignment.

I should start a separate thread on my experiences with basic ti repairs. Like a reboot of my posts.
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