Interesting, found this on the Michelin site.
Apparently Z6's, conti's and Bt021 are the same in mileage.
Quote:
Confirmed by independent tests compared to our 6 top European competitors in the same category
Longest Mileage
1st Michelin Pilot Road 2
2nd= Bridgestone BT-020
2nd= Dunlop D220ST
4th Pirelli Diablo Strada
5th= Bridgestone BT-021
5th= Metzler Roadtec Z6
5th= Continental Road Attack
Best wet grip
1st Michelin Pilot Road 2
2nd Pirelli Diablo Strada
3rd Metzler Roadtec Z6
4th Continental Road Attack
5th Dunlop D220 ST
6th Bridgestone BT-021
7th Bridgestone BT-020
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