Latex tubes hold air differently than butyl, flexing with the tire instead of fighting it, and that translates to lower rolling resistance and a more supple feel over rough pavement. Challenge builds its Latex Tubes as seamless one-piece inner tubes, which eliminates the bonded seam that can create a pressure point or an uneven ride. The result is a tube that conforms smoothly to the casing with none of the pucker or bump you get from a folded, seam-bonded design.

These come in two size ranges to cover most road and cyclocross setups. The 700x24-32mm option handles standard road tires, while the 700x33-42mm version fits higher-volume cyclocross and gravel casings. Both use a 60mm valve, which is the length you want if you're running mid-depth or deeper aero rims and are tired of fighting short valves with extenders. Latex is strong and extremely elastic, and that elasticity is part of why it resists punctures the way it does — the material stretches around debris rather than tearing on contact.

The valve stem is bonded to the tube for durability, with a 2-piece removable core that makes extender use or a quick core swap straightforward. If you're chasing the ride quality that latex is known for and want to skip the valve-length headaches that come with deeper rims, the 60mm valve here does that work for you. Keep in mind that latex loses pressure faster than butyl, so plan on topping off before every ride.... Read More