Airstop® Butyl tubes answer the needs of everyday cyclists for economical, high quality inner tubes. In each size, Airstop Butyl tubes offer excellent puncture resistance and the consistently high quality for which Michelin is famous.
PLEASE NOTE: 18-25c for stock 63726
Valve Type: A1 - unthreaded
40mm presta valve - 96g
52mm presta valve -98g
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Rated 4 out of 5 by Eddiefromdublin good value
I have found this tube to be very good and easy to repair if you repair tubes
11 August 2014
Rated 3 out of 5 by KasperC Decent tube for the price
I have bought three of these tubes. So far I have had no punctures, but I have had one tube fail. The tube developed a hole near the valve on the side of the tube facing the rim. I checked for foreign objects and defects on the rim which could have caused the hole but found nothing.
The hole developed literally over night. Rode the bike home one evening with no problem and the next morning it could no longer hold any air. It would deflate faster than I could disconnect the pump from the valve.
From other reviews of the tube it does not seem to be an isolated incident as others have mentioned having a similar failure.
A try at sealing the hole with a patch failed and I switched the tube all together. The old tube failed after about 2 months of use at 140 psi.
I have little experience with high pressure tires regarding how well they should hold air. My experience with these tubes are that they go from 140 psi to 110-120 psi over 2 to 3 weeks. They seem to no longer loose pressure once they reach 70-80 psi.
I find the value and quality to be average because the tubes are cheap and I have only had problems with one out of three as of yet. The faulty one might just have been a lemon. Yet a failure with no apparent cause detracts a lot on the value part as well as the quality. If the tubes are cheap but fail fast the value will fall.
14 July 2014
Rated 5 out of 5 by Zhylihan Good tubes
Great value for money, seems to keep the air longer than my old tubes. No problems so far.
25 June 2014
Rated 1 out of 5 by Sammy71 Not good at all
Used it with Michelin Dynamic tires and they got punctured after a couple of rides (glass just cut through it)
got it patched up but didn't last couple of rides again
a tiny hole appeared, 1mm next to the valve
it did less than 100km (maybe bad chance), tire quality was also poor
will never buy Michelin again
06 June 2014
Rated 5 out of 5 by bernmc Robust tubes
Good, robust tubes - better quality than the continental rubbish I tried before these. And the valves seal well without screwing them shut, so they work well with valve extenders. They do seem to loose air slightly slower than non-butyl tubes, but you should be checking tyre pressures regularly anyway, so I'm not sure this makes a huge difference - whether I press the pump plunger 2 times or 5 times before I head out for a ride doesn't really make a difference to me.
01 June 2014
Rated 3 out of 5 by helman Perhaps I got a dud batch
I received 3 of these with Michelin tyres I purchased recently. I thought that I must have pinched the first one I put on. Annoying. So I put the second one on extra carefully and it too had a hole in it. I inspected both tubes and found that the holes were small pin hole sized ones. They weren't your typical longitudinal shape that you typically get with a tube pinched against between the rim and the tyre so all I can put it down to is cheap construction of the tube.
01 June 2014
Rated 4 out of 5 by Pablocarlos Good, but just as good as you get from other top brands
Good inner tubes, quality build and no issues fitting them. There is no extra protection against punctures, but they are lightweight.
If there was something extra to prevent puncture on top of the whole package, I would have rated it higher. But it is a quality tube!
22 May 2014
Rated 5 out of 5 by Feeq15 700km and counting ....
Have used this tube for more than 700km and still counting, in Singapore road condition. Together with Michelin Service Course Road tyres, it's just gets better. Went through potholes (accidentally of course) and still does its job.
02 May 2014