Michelin A2 Airstop Tube

I've been using these tubes for years and have had only one defective tube. This is a much better record than I've had with house-branded tubes such as Performance. These aren't the lightest tubes out there, but the rubber thickness appears uniform, the seams are well made, and the valves work great. Sorry that the previous reviewer had problems with these, but my friends and I have all had good results with these.

These, in combination with Continental Gator Hardshell tires have eliminated my frequent flat problems. These tubes are noticeably thicker than any other tube I have used. So they are going to be slightly heavier. But man, do they give confidence that I'm not going to have a lot of flats. These are the only tube that I have ever used that will hold 90 psi pressure for extended periods of time. I'm a weekend rider, and before using these tubes, my tires would typically be down to about 40 psi after the 1 week interval. These tubes are usually still up in the 80 psi range after a week.

I bought a batch of three of the A2 tubes. Each one has given issues with the valve stem, where you try to inflate and the pressing in on the stem does not open the valve. Can't fill with air if you can't open.

I trying working the stem in and out and applying silicone lubricant, with little sucess.

I thought the first one a fluke, then 2 and 3 went bad very quickly too.

I loave BikeTiresDirect and will continue buying from them, but will not buy any more of these tubes.

I've been using Michelin tubes for more than thirty years and find them to be reliable. I've never had one fail at the valve stem, where the cheaper tubes tend to fail.

I have been using these tubes with the Michelin Mud2 tires for cyclocross racing. They are most resilient tubes I have used. A small puncture only resulted in a slow leak and I was able to finish the race. I have pinch-flatted on one occaision, but that comes with the territory.

4 for 4, entire batch of defective presta valves. None of them will hold air. I had to resort to using oem tubes to mount my tires as these wouldn't hold air for even 5 minutes. I'm not sure I'll ever buy another Michelin tube again. That's not a QC issue, it's a complete lack of checking at all. Even the cheap Chinese made tubes I got from the local bike shop were better.

Smooth. Pump them up and weeks later you are at 90%. They seem to help good tires resist punctures. Don't ask me how.

The tubes have ALWAYS been good, especially paired with their tires.

Mounting on the bike ring would seem loose but installing on the tire fits perfectly

Thick tube good durability..

basic tube for great price

I purchased several of these tubes and found them to be much too big for my bike wheels and tubes, so much so that the only way to get them into the tire was to fold them. Not good when you have a road flat. I ended up ruining a new road tire. I have returned all of them but the one I had to use on a road flat and will certainly not buy them ever again.