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Bridgestone Potenza RE050A RFT.....2009 Sport Package Tire
Front: 215/40R18
BMW RunFlat
Sidewall Style: Blackwall
Serv. Desc: 85Y Load Index 85 = 1135lbs (515kg) per tire
Speed Rating “Y” = 186mph (300kph)
UTQG: Treadwear: 140
Traction: A
Temperature: A140 A A
Dunlop SP Sport 01 DSST RunOnFlat.....2009 M Sport Package Tire
Front: 215/40R18
RunFlat
Sidewall Style: Blackwall
Serv. Desc: 85Y Load Index 85 = 1135lbs (515kg) per tire
Speed Rating “Y” = 186mph (300kph)
UTQG: Treadwear: 280
Traction: A
Temperature: A280 A A
Treadwear rating on the Bridgestone is 140.. significantly softer compound..
In my opinion this is the most important difference between the Sport package and the M Sport Package....on the 2009 model. Don't know if 2010, and 2011 are the same.
Shane
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