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      01-28-2009, 08:17 AM   #1
Kev
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Tire Size Help

I'm trying to see if the tire size that I have in mind works with the offset:

PCD 5X120
Front: 19X9.5 ET22
Rear: 19X10.5 ET25

Tire size:
Front: 265/35R19
Rear: 305/30R19

I'm thinking of doing Conti CSC3 which has a skinnier side wall or the OEM PS2s
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Last edited by Kev; 01-28-2009 at 10:18 AM.
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      01-28-2009, 08:30 AM   #2
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I think you'll need 10mm spacers...but I am not a pro at this. You're going to be adding about 6mm up front and 10mm in back. Plus with 305 I think you'll have to roll your fenders.

Edit: I looked at this again and I think I have the numbers backwards.

Last edited by Big Windy; 01-28-2009 at 10:16 AM.
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      01-28-2009, 10:00 AM   #3
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I don't think I'll need spacers. I'll take a look at the offsets again. These are E9X M3 specific offsets from the manufacturer.

Thanks. Think I'll go with the 265/35 and 295/30 with PS2s then.
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      01-28-2009, 10:12 AM   #4
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You won't need spacers in the front. That's for sure. I run that setup for summer use.

In the rear, I'd be a little concerned with that width (305). I don't think you'll have a problem on the outside, but maybe on the inner wheel well.

My rear track set-up is going to be 18 x 10.5 et28 and I want to go to 295 width PSCs. I have the same concern over clearance on the inside. So I'd be very interested to know if you clear on the inside.
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      01-28-2009, 10:15 AM   #5
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I guess we'll find out when spring comes. Based on the offset, it's more like I'll have problem on the outside than the inside, i.e. if there any problems at all.

This guy cleared with 285/35R19 on 19X10.5 ET25 wheel.

http://www.m3post.com/forums/showthread.php?t=155461

*EDIT*

I'm retarded. I copied the offset wrong. I have the exact same 19X105. ET25 offset in the back. 305 should be fine, but 295 would be safer.
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      01-28-2009, 11:21 AM   #6
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Quote:
Originally Posted by Radiation Joe View Post
My rear track set-up is going to be 18 x 10.5 et28 and I want to go to 295 width PSCs.
What brand wheels are you thinking about going with Joe? And what wheel size will you have up front?

I am thinking about going with 18x10.5 R (285) / 18x9.5 F (265) for my track setup.
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      01-28-2009, 04:44 PM   #7
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Quote:
Originally Posted by lucid View Post
What brand wheels are you thinking about going with Joe? And what wheel size will you have up front?

I am thinking about going with 18x10.5 R (285) / 18x9.5 F (265) for my track setup.
That is my current track set-up. I'm carrying over my e46 wheels for use on the e90.

BBS RE forged magnesium with Michelin PSCs

9.5 x 18 et35 with 265/35-18 PSCs and prolly a 10mm spacer
10.5 x 18 et28 with 285/30 or 295/30-18 PSCs



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      01-28-2009, 05:41 PM   #8
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Quote:
Originally Posted by Radiation Joe View Post
That is my current track set-up. I'm carrying over my e46 wheels for use on the e90.

BBS RE forged magnesium with Michelin PSCs

9.5 x 18 et35 with 265/35-18 PSCs and prolly a 10mm spacer
10.5 x 18 et28 with 285/30 or 295/30-18 PSCs
Very nice. For reference, do you know the weight of the rims and how durable are they compared to forged Al?
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      01-28-2009, 06:25 PM   #9
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One of my fronts weighs less than 17 pounds.
My one 10.5x18 rear wheel that has cracked twice weighs 17+ pounds. Mag wheels technically have a limited lifespan.

I put them through hell for a year on east coast roads around Philly. I got a hairline crack in one. Had it repaired and I think the weld repair created some residual stress that caused it to crack again. They are awesome wheels, but I recommend forged aluminum wheels. Good aluminum wheels only weigh a pound or two more.

TCKline website
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      01-29-2009, 02:33 AM   #10
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Quote:
Originally Posted by Kev View Post
I'm trying to see if the tire size that I have in mind works with the offset:

PCD 5X120
Front: 19X9.5 ET22
Rear: 19X10.5 ET25

Tire size:
Front: 265/35R19
Rear: 305/30R19

I'm thinking of doing Conti CSC3 which has a skinnier side wall or the OEM PS2s
i think 305 is way too wide ... 295/30 would be the best choice i think ... i run 20/10.5 et 28 with 285/30 and i like it a lot ...
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      01-29-2009, 10:51 AM   #11
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Quote:
Originally Posted by doba_s View Post
i think 305 is way too wide ... 295/30 would be the best choice i think ... i run 20/10.5 et 28 with 285/30 and i like it a lot ...
More info? Pictures?

So you have 285s on 10.5 et28s. Lots of clearance? I'm just about ready to pull the trigger on a couple of Michelin PSCs in 295/30-18. Just looking for some indication that there won't be any clearance problems.
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      02-04-2009, 12:35 AM   #12
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295/30-19 is the best choice. the 285's will work no problem.
However, I know that 285 with +18 offset on a 20" rubs a little.
It is not exactly the same gemetry but on 19's if you go by just numbers, they stick out 13mm more with the 305 and +25 offset.

Although what I have learnt about wheels over the past years is that they are so sensitive to the degree of mm's but every car and every setup is different.
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