986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

thstone · 01-09-2011, 09:48 PM

I think that you're not getting much tire pressure advice because adjusting tire pressures can't possibly solve the problems that you have described.

Here is a guarenteed solution to every problem you mentioned:

Step 1: Throw away all four of the cheap Grand Touring tires.

Step 2: Go buy a set of four Michelin PS2's and have them installed at a reputable tire installer. You simply cannot go wrong with these tires.

Step 3: If you want to reduce a little of the inherrent understeer that is designed into the Boxster, then go slightly wider and slightly lower in profile in the front (245/35/18) to get a little better front bite. You need to lower the profile (while increasing the width) to keep the overall diameter nearly the same as the stock tire to avoid problems with your speedo and ABS. Stay stock in the rear (if you increase width in the front and rear then you won't address any of the stock understeer).

Case closed. Problems solved.

01-09-2011, 09:48 PM	#13
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	I think that you're not getting much tire pressure advice because adjusting tire pressures can't possibly solve the problems that you have described. Here is a guarenteed solution to every problem you mentioned: Step 1: Throw away all four of the cheap Grand Touring tires. Step 2: Go buy a set of four Michelin PS2's and have them installed at a reputable tire installer. You simply cannot go wrong with these tires. Step 3: If you want to reduce a little of the inherrent understeer that is designed into the Boxster, then go slightly wider and slightly lower in profile in the front (245/35/18) to get a little better front bite. You need to lower the profile (while increasing the width) to keep the overall diameter nearly the same as the stock tire to avoid problems with your speedo and ABS. Stay stock in the rear (if you increase width in the front and rear then you won't address any of the stock understeer). Case closed. Problems solved. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 01-09-2011 at 09:52 PM.