I just flatted my rear heavy duty tube and it was a Michelin,Im not buying any thing made by the French any more (even though it was a good tube).In my catalog I can get a Ultra H.D. tube by MSR for $12.99,or a Ultra H.D. tube from Bridgestone for $22.49.I ride in some nasty rocks and want a good flat resistant tube but what a price differance,has any one used these tubes?If so let me know what you think of them,of course Im thinking get the MSR,but if the Bridgestone is a better tube Ill spend the extra money,Thanks.