Michelin A1 AirStop Butyl Road Bike Tube Specifications:
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.
Valve Type: A1 - unthreaded
40mm presta valve - 96g
52mm presta valve -98g
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