I have installed 20" Detroit wheels on my '97 XK8, and need to find out what the correct tire pressure(s) should be.

Anyone got a 2000 Silverstone that could check for me?

Any info would be helpful.

Thanks!

 

Front 32psi
Rear 30psi

 

Thanks for the quick reply - I appreciate the information.

 

I recently learned this from the place I have do my tire work, and they mentioned that it's not the brand, size or even the profile of tire that dictates the tire pressure, but actually the weight of the vehicle.

Whatever your recommendations that are stamped on your vehicle (center console lid on the xk8) is what you want to go with.

 

Tire pressure has been a topic by many and to date I have yet to see everyone to agree, including me. I had the misfortune in trusting my buddies tire shop to put the proper tire pressure in my newly purchased and installed tires. I found that they over pressurized the tires causing them to have excessive wear in the center of the tire. It was time to replace the tires and I made an effort to check the pressure and maintain the pressure that was stated on the lid of the center console (32 F 34 R). I still had excessive wear in the center of the tire. I then replaced the air with nitro and reduced the tire pressure (30 F 32 R) and to date it seems that the tire wear is consistent. Now changing to nitro was my choice and not imperative, however, it has reduced the number of times I have had to refill the tires. But the tire pressure being reduced has improved the tire wear to be more consistent. Comfort, ride and handling will dictate what you want. Documentation of my tire wear is on my page. Good luck on what you elect to do.

 

Gus, same here...i've also lowered my pressures after going thru my first set of tires. Front, in my experience, was not off in the center at 32 psi, but the rears, I dropped to 30 like macbut recommended above. Too early to tell if its made a big difference since I have few miles on the new rubber.

 

I would AGREE with Gus on the topic of filling tyres with Nitrogen,your tyre pressures will maintain consistency for alot longer.

I have been doing this with my tyres for many years and definetly makes them last longer

 

After reading the additional posts to my initial question, I've done some more research on "correct" tire pressure. The answer is: there is no answer.

There are many factors that dictate the right tire pressure for a given situation. Load bearing, contact patch size, typical driving speeds, road conditions, comfort, tire composition, tire wear, sidewall construction, etc., etc. all influence the "correct" tire pressure.

Gus is on the right track - start with the factory recommended pressures (regardless of the wheel/tire package) and adjust by road feel and tire wear. It's imprecise, but it seems that is the best method to dial in what is best for each car and driver.

Thanks to all who responded.