Fat Bike Inner Tube 2-Pack, Schrader Valve

A flat on a fat-tire e-bike needs a tube wide enough for the tire, or it will stretch thin and fail again. These butyl inner tubes come in packs of two with a Schrader valve (the same valve type as a car tire), in four size options.

Pick the size printed on your tire sidewall: 20 x 3.0/3.5 in heavy duty (76/89-406, 32 mm valve), 20 x 4.0 in (35 mm valve), or 26 x 3.5/4.0 in in regular or heavy duty (32 mm valve). The listings describe the heavy duty tubes as 40% thicker than ordinary butyl tubes.

Check before you order: read the full size on your tire sidewall (for example 26 x 4.0) and make sure it falls inside the range of the option you choose. These are Schrader tubes only: check that your rim's valve hole suits a Schrader stem and that the 32 mm or 35 mm stem is long enough to clear your rim.

One pack holds two tubes, so you can do both wheels. Before fitting a new tube, run a finger inside the tire and along the rim for the thorn or sharp edge that caused the flat.

Not sure it fits? Email photos to support@riderow.com and we'll check before you order.