Tire size difference and PSM

[Burg Boxster]

Originally Posted by ganseg

...Toyo Proxes 888...

Word to wise... I wouldn't use R888s for anything other than DE/AX purposes.

I have a set, for such purpose and they perform well BUT on street (I'll throw on only to get to/from local events) they make car sound like the wheel bearing in each corner is cooked...

[stephen wilson]

The 986 may be different, but on my 987 the PSM/Traction Control will kick in all the time if the front tire is much taller than the rear ( vs. OEM ). It sees the increased relative rear wheel speed as wheel-spin.