Weird Michelin PS2 deal

[Steve1968LS2]

Was working on Penny today and noticed something odd.. my front tires don't match in regards to treadpattern.

Huh.. imagine that..

Come to find out there are at least 4 different part numbers for the PS2 275/25/18 tire

84530
94902
36599
43657

The 32611 is a run flat, the 84530 is for the Viper, three of my tires are 94902 and my "odd ball" front left tire is a 36599.

I think one of these is for a Porsche and one is for a Mercedes.. The 36599 is also quite a bit cheaper than the other tires with the Viper version being the most expensive but a couple of bucks.

I thought I remembered reading that these tires had slightly different grip (compound modifications) in addition to the different tread patterns. I'm sure if one of my front tires is softer than the other that it's not helping in the handling event.

Anyone hear anything on this? I was trying to Google the PNs to find what cars these are for but no luck.

In any event just be aware of this if ordering PS2 tires for your car.