On a 18x8.5 I would go with a 225/40/18
On the 18x10 I would go with 285/30/18
These are both OEM Porsche Tire sizes.
On your set of wheels though your rears WILL require spacers. The ideal offset for an 18x10 wheel on the rear of the Boxster is 42mm-45mm. There is no way a 18x10 58mm will fit.
Hope this helps.
__________________
http://i46.tinypic.com/2qx0rqs.jpg
2001 Boxster Artic Silver / Black Interior
-GT3 Front Bumper w/ Lip
-Side Skirts
-Gemballa Exhuast and Cats
-O.Z. Racing 18" Wheels
--18X8.5Front 18X10 Rears
-Michilen PS Tires 225/40/18 & 285/30/18
-5mm Rear Spacers
-Porsche Door Sills
-H&R Springs
-Powerflow Intake
-B&M Short Shifter
-Pioneer Avic-F90BT Navigation
-Focal Polyglass 165VR3
-Alpine PDX 5 Amp
-Bose OEM Subwoofer & Midrange
-Audio Controld DQXS (DSP)
|