Michelin A1 Aircomp Ultralight Fahrrad Schlauch 28´´

These are nice light tubes, and they've held up well so far. My only complaint is that they seem to lose air at a fairly quick rate. I have to check my tire pressure before every ride, even if it's only been a day or two since the last ride. This may just be a function of the thinner rubber for the ultralight tube, but it's still annoying.

I bought two of these at Performance bike shop because they were on sale. Smooth stems looked nice.Both of them came apart at the seam. One lasted a few miles from home, another lasted little longer but otherwise more walking distance to home. I had a patch kit and a pump but no use. At least I got refund when took them back to the store. I explained the store clerk what had happened and he wasn't even surprised.I had different brands of tubes mostly cheap store brand in the past but nothing compare to this. I was very surprised because this happened to well-known name.What I learned from this. 1) Don't buy anything says ultra light. 2) Don't buy anything only because it's a well-known brand name, it was probably made by another company.I weigh 140lbs, so the weight wasn't an issue, just in case you are wondering. I inflated it 120psi. Size of the tire was 700x20c.You can avoid pinch flat snake bites by inflating the tire to certain pressure. If the tire picks up a broken staple, it gets flat but you can patch it. When the tube comes apart, you can't do anything specially if the spare you happen to have has the same defect.I'll never buy it and I don't recommend this to anybody.

I have been riding on these tubes for two years now (about 5 thousand miles) and got my first flat with them earlier this week, and it was a pinch flat when I hit a large pot hole going about 22mph. I'm pleased with them. I race on them. No problems. I ride a trek madone 5.2 and weigh 145 pounds

Con menos de 1 mes de uso, las válvulas no son capaces de retener ni 6kg de presión de aire, tendré que tirar con todas las que he comprado. Un desastre