This product has been deactivated
Michelin A1 Competition buytl tube:
Manufactured with a high quality, very elastic butyl rubber to Michelin's precise uniformity standards, these tubes are optimized for enhanced rolling efficiency. Each one is precisely sized for uniformity and elasticity and to allow for the lightest weight possible.
Size: 700c x 20-23 with 40 or 60mm, Nonthreaded Presta valve
Weight: 70 g.