The MICHELIN AirComp Ultralight A3 inner tube 700x33/46C represents French excellence in lightweight design optimized for performance. With only 115 grams on the scale, this ultralight butyl tube targets demanding cyclists seeking significant weight savings on road and gravel wheels, without compromising reliability. Designed for competition and intensive training, it offers optimal performance thanks to its ultra-thin construction and 48 mm Presta valve with smooth stem that facilitates inflation and reduces pump wear.

Performance and weight optimization

• Ultralight butyl construction: At 115 grams, this inner tube sits in the high-performance segment, comparable to latex models while retaining the practical advantages of butyl (better air retention, less maintenance).
• Rotating weight reduction: Every gram saved on the wheel improves acceleration, sprint responsiveness and climbing efficiency — a decisive advantage for competitors and time trial enthusiasts.
• Optimized for competition: This inner tube is part of Michelin's Service Course range, used by professional teams for its reliability under maximum stress.
• Excellent pressure retention: High-quality butyl ensures superior air retention compared to latex, requiring inflation only once or twice per week versus daily inflation for latex.

Technical design and ergonomics

• Presta valve 48 mm with smooth stem: The non-threaded valve distinguishes the AirComp Ultralight — it reduces pump seal wear, facilitates pump head engagement and disengagement, and eliminates seizing problems.
• Removable valve core: Allows addition of sealant or use of valve extenders, practical for medium-depth rims (30-50 mm).
• Extended compatibility: Designed for 700C tires from 33 to 46 mm width (ETRTO 33/46-622/635), it adapts perfectly to wide road, gravel, cyclocross and bikepacking configurations.
• Eco-responsible packaging: The new generation Michelin packaging is 100% recyclable, with printed marking (not molded) on the tube to reduce environmental impact.

Applications and areas of use

This AirComp Ultralight A3 inner tube is designed for gravel racers, road cyclists riding wide tires (comfort + performance), cyclocross competitors seeking weight savings, and bikepackers prioritizing weight/reliability ratio. It is ideal for intensive use on mixed roads, rolling paths and competition courses where every gram and every watt counts.

Points of attention and installation recommendations

• Delicate installation: Due to its reduced thickness, this ultralight tube requires careful hand installation (without tire levers) to avoid pinching between the tire and rim.
• Adapted pressure: Follow the tire manufacturer's inflation recommendations to avoid pinch flats, particularly on rough terrain.
• Simplified maintenance: Unlike latex tubes, the AirComp does not require inflation before each ride — a weekly check is sufficient to maintain optimal pressure.

Michelin's reputation serving cyclists

Michelin, world leader in tires since 1889, puts its cutting-edge expertise at the service of cyclists with the AirComp range. These ultralight inner tubes embody the perfect balance between lightness, reliability and lasting performance, validated by decades of innovation and testing in real competition conditions.