Schwalbe SV21 Standard Tubes are for gravel, cyclocross, 27.5" MTB, and tyre widths from 1.5" up to 2.4". Made from 20% recycled rubber, so not only are they low in weight, they're lower in their carbon footprint. All valves are nickel plated and threaded and valve inserts are replaceable. Less likely to leak, and more reliable.

Specifications
Fits Tyre Sizes:  27.5" (Width 1.5" to 2.4")
Valve Type: Presta 40mm

Mfr Claimed Weight
TBC