Need help with Tire sizes ... - The Unofficial BMW M5 Messageboard (m5board.com)

M3This · 12th February 2008, 00:09

Hey guys I ordered up some new 20" wheels for the M6 and they come in in less then 10 days. Can some one help me with tire sizes?

New wheels are

20x9" Front
20x11.5" Rear

I know stock is 255/40/19 on a 19x9" rim and rear is 285/35/19

so I was thinking 255/35/20 Front and 305/30/20 Rear .... but there is no such size as 305/30/20 that I could find and I was hoping to stay with the PS2s :p

plastique999 · 26th February 2008, 07:24

It depends on your springs as well...if you want to fill in a nice wheel gap along with a drop, the 255's and 285's have an appropriate sidewall amount to fill in the gap. So the 305's will have a lower section height, but more wheel gap.

Tiptronicsoldier · 26th February 2008, 10:35

Quote:

Originally Posted by M3This

Hey guys I ordered up some new 20" wheels for the M6 and they come in in less then 10 days. Can some one help me with tire sizes?

New wheels are

20x9" Front
20x11.5" Rear

I know stock is 255/40/19 on a 19x9" rim and rear is 285/35/19

so I was thinking 255/35/20 Front and 305/30/20 Rear .... but there is no such size as 305/30/20 that I could find and I was hoping to stay with the PS2s :p

You're gonna have some fatties on the back - please post pics

blkfast6 · 26th February 2008, 21:22

Use Tirerack.com

GotYa! · 26th February 2008, 22:01

Quote:

Originally Posted by M3This

Hey guys I ordered up some new 20" wheels for the M6 and they come in in less then 10 days. Can some one help me with tire sizes?

New wheels are

20x9" Front
20x11.5" Rear

I know stock is 255/40/19 on a 19x9" rim and rear is 285/35/19

so I was thinking 255/35/20 Front and 305/30/20 Rear .... but there is no such size as 305/30/20 that I could find and I was hoping to stay with the PS2s :p

Are you sure about the 11.5's for the rear? I was under the impression that any wheel over 10.5's could rub...? I heard this from a couple of wheel venders but not 100% sure. If it works out, a fat rear is always nice. A little junk in the trunk...Yah!

Cosmos · 27th February 2008, 00:26

11 with the most perfect of offsets will be ok, 11.5 sounds a bit big to me.

M3This · 7th May 2008, 22:58

The wheels are from 360Forged Im like 90% sure they are 11.5 Rears ... I have 11" rears on my 335i :p

I ended up with 255/30/20 F and 305/25/20 R

DynamicMotoring · 8th May 2008, 03:31

Did you get the wheels on? You should check with Jordan @ 360 to see the actual size, because Im sure he would use a 10.5 in the rear.