My 06 aero has 6700 miles and although the stock bridgestones would have gone for awhile I got the 170 for the rear and its much better for 2 up with the wife and looks alot better. It is one heavy tire. The front was the same size numbers but was alittle narrower than the stock tire. But the bike turns so much easier now. The new tires are well worth the money and the best thing Ive done for the ride so far.