Anyone running 285/30/18 in the back? - 6SpeedOnline - Porsche Forum and Luxury Car Resource

Jun 21, 2012 | 05:43 AM

Sql_pl

Thread Starter

Banned

Joined: Jun 2011

Posts: 272

From: Poland

Rep Power: 33

Anyone running 285/30/18 in the back?

I have a great offer on 285/30/18 tyres, Conti Sport Contact 2.

Do you think it may be a risk to be running 285/30 instead of 295/30 while keeping stock 225/40 size at the front?

Jun 21, 2012 | 06:51 AM

ant_8u

Registered User

Joined: Jul 2008

Posts: 1,751

From: Warwickshire, England

Rep Power: 141

What's the rolling circumference and diameter of them both according to tire rack?(fronts and rears)

How old/worn are your fronts?

Jun 21, 2012 | 07:39 AM

DERBOOST

Registered User

Joined: Feb 2007

Posts: 982

From: Montana

Rep Power: 63

285 probably bout 24.6 or .7, fronts 25.1 or so 295's like 25.3 ish

Jun 21, 2012 | 07:46 AM

bushman66

Registered User

Joined: Mar 2012

Posts: 37

From: AZ

Rep Power: 16

bushman66 is infamous around these parts

I have them on mine, it bugs me a bit (they came on the car), but they are within the acceptable margin by Porsche for difference front to rear...

Jun 21, 2012 | 11:31 AM

Sql_pl

Thread Starter

Banned

Joined: Jun 2011

Posts: 272

From: Poland

Rep Power: 33

Bushman, does your rim stick far our with this narrower tire?

Jun 21, 2012 | 03:07 PM

bushman66

Registered User

Joined: Mar 2012

Posts: 37

From: AZ

Rep Power: 16

Quote:

Originally Posted by Sql_pl

Bushman, does your rim stick far our with this narrower tire?

Not that I've really noticed. I'm just more concerned about the (slight) additional stress its putting on the front diff. I'd change out the tires if they weren't nearly new, and PS2's weren't $450ea LOL