anyone 305's on the rear

[Tomcat 74]

Hi

Anyone running 305/25/22 in the rear? Any issues?

Manfred E......
2004 760LI

[billh]

I am running 295/30-21's with no issues.

[Tomcat 74]

Hello,


I'm now running 295/25/22. Now I'm thinking 295/30/22 or 305/30/22 on the rear.
Manfred E....
2004 BMW 760LI

[TxGR8White]

I am running 295/30-21's with no issues.

Bill, are those Michelin's?

[billh]

Bill, are those Michelin's?

Yes, Michelin Pilot Sport 4s

[TxGR8White]

Yes, Michelin Pilot Sport 4s

Are you running the 245's up front?, or did you bump that size up also?

[billh]

Are you running the 245's up front?, or did you bump that size up also?

Bumped the front also.
Stock Dia "New" Dia Diff
245/35-21 619.15mm 255/35-21 622.65 3.5mm
285/30-21 618.90mm 295/30-21 621.90 3.0mm
"New" rears are .75mm smaller than the "new" fronts

Bill

[TxGR8White]

Bumped the front also.
Stock Dia "New" Dia Diff
245/35-21 619.15mm 255/35-21 622.65 3.5mm
285/30-21 618.90mm 295/30-21 621.90 3.0mm
"New" rears are .75mm smaller than the "new" fronts

Bill

Thanks

[TPIOlds]

I run 295/35-21 on the back and 275/35/21 on the front of my B7

the 295/35/21 on the 10.5 " rim has a foot print of 11.6 "

here is link to a great tool

http://www.rimsntires.com/specspro.jsp/

[robi545]

295/35-20 rear and 265/40-20 on the front of my 2006 760Li in the summer with Michelin Pilot Sport PS4 S.
Because I like the PS4 S and because the extra 20mm, over the more commonly seen 275 and 245, gives better rim protection to the snowflakes, which are pretty but flat faced.
Winter 265/40-20 front and rear now with Michelin Pilot Alpin PA4 - yet to see any action.

The only issue is that even the 265/40 front won't go in the spare wheel well.
Weird thing is 255/40 PS4 S on 8.5J M167 and 275/35 PS4 S on 9.5J M167 give much better rim protection than said PS4 S on snowflake 9J and 10J

Footnote: PS4 S are available as aftermarket (optimised to look good in official economy, wet and noise tests, though be excellent all-round) and more recently as manufacturer approved.
AO Audi - Not seen these yet
MO Mercedes - not visibly different from aftermarket. Data says something is different, but not noticeable under normal driving.
Ferrari - WHOA big size difference - 295 more like 315 on those I've seen. Lots of these s/h - caution!
There were some early tyres with different tread pattern - Not seen these in the solid.

https://www.wiltheyfit.com
https://www.tyresizecalculator.com/tyre-wheel-calculators/tyre-size-for-rim-size-width-calculator

[zener]

325/25R21 test fitted. 11.5x21" wheel.