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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