Michelin's A4 Airstop Tube is ideal for training and recreational riding. Available in size 29" x 1.9" - 2.1" (48/54-622 ISO), with a 40 mm threaded Presta valve stem. 230 g.
Note: If your rims are designed for Schrader valves (like on a car tire), you can use "Presta Stem Savers"—metal sleeves that fit over Presta valves to provide a snug fit in Schrader-sized valve holes.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.
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Reviewed 2/5/2021
by Kirk
Cycling Enthusiast
Sarasota FL
Value Rating
Overall Rating
3 of 3 customers found this review helpful.
Holds air better
Durable inner tube that holds air longer. Requires addition of air far less often
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3 of 5 customers found this review helpful.
good product
This product is average yo above average. Recommend for easier trails
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Airdrop 29" tubes
Great price point as well as lest time at the pump handle filling up.
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Airdrop 29'r tubes
Great price point as well as lest time at the pump handle filling up.
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