Upgrade your cycling experience with FST Ultralight TPU Innertubes, engineered for riders who demand massive weight savings without sacrificing durability. Backed by high-quality German engineering, FST tubes offer a modern alternative to traditional butyl rubber, providing a significantly lighter and more compact spare for your ride. 

Key Features:

Tough Premium TPU: Constructed from premium Thermoplastic Polyurethane (TPU) material built to withstand the rigors of the track.

Zero-Leak Welded Seams: Designed with advanced welded seams to guarantee zero leaks and reliable air retention. 

Aluminum Valves: Outfitted with premium aluminum valves, shaving off extra grams while ensuring a strong, secure connection. This also eliminates air leaks at the valve as seen in traditional plastic valve stems.

Ultralight Performance: Drastically reduces rolling weight compared to standard tubes, with models starting as low as 29g. 

Available Sizes & Weights:

20 x 1 1/8-3/8 29g

20 x 1.4-1.6 34g

20 x 1.6-2.1 42g

24 x 1.6-2.1 50g

50mm Valves