Continental ContiTech Presta Valve Tube

These tubes are engineered to be nearly 30% lighter than standard butyl inner tubes. Depending on the valve length you choose, the weight ranges from 70g to 90g, which helps reduce rotational mass for snappier acceleration.

While they are lightweight, they are constructed from durable, seamless butyl rubber. They are robust enough for daily training rides, though they are slightly more delicate than heavy-duty touring tubes.

Your valve length should be determined by the depth of your wheel rim. You need a valve that extends at least 15-20mm beyond the rim profile to ensure you can easily attach your pump head.

Yes, these are designed for standard 700c road clincher tires ranging from 18mm to 25mm in width. They are compatible with almost all standard road bike clincher systems.

That specification is a conservative safety rating often found on packaging for liability reasons. While you should always follow your tire manufacturer's recommended pressure, these tubes are designed to handle standard road cycling pressures well beyond 40 PSI.