Force 26 x 1 1/4 x 1 3/8, AV 35mm

The Force bike inner tube is designed for road and trekking bikes with 26-inch rims. It is compatible with tyres with an ETRTO dimension of 37-590 to 40-590, which corresponds to the 26 × 1 1/4 × 1 3/8 marking. The inner tube features a standard 35mm Schrader valve (AV), which makes inflation easy at most petrol stations or with standard pumps. Weighing just 145g, it won't add unnecessary weight to your bike and contributes to a smooth ride.

Compatibility and ease of use

The Schrader valve (AV), also known as an auto valve, is a major advantage when it comes to inflation. Its design is identical to the valves used on cars, so you can easily inflate the inner tube at most petrol stations or using standard bicycle pumps. When choosing an inner tube, the ETRTO dimension is key. In this case, it covers tyre widths from 37 to 40mm on a 590mm rim. This precise marking ensures the inner tube will fit your tyre correctly. Furthermore, its low weight of 145g reduces the bike's rotational weight.