A CYCO Bikes TPU inner tube for 25 to 32mm tyres, with a 60mm Presta valve. TPU tubes weigh a fraction of butyl and pack down small enough that carrying a spare stops being a decision.

Thermoplastic polyurethane replaces the butyl rubber of a conventional tube. The material is thinner and lighter for the same strength, so the tube weighs a fraction of a standard one and rolls with less resistance. It also folds down to roughly the size of a bar wrapper, which is the practical benefit most riders notice first.

Key features

• Fits 25 to 32mm tyres
• 60mm Presta valve
• Substantially lighter than a butyl tube of the same size
• Packs down very small as a spare

The cheapest way to take real weight off a bike. Keep one in the saddle bag even if you run tubeless.