NEW Fumpa TPU Inner Tube Size:29" x 2.5" and this is made possible

and this is made possible on 90 with an XS-1275 T-Type cassette that features full X-Sync technology

Sturmey-Archer Indicator Chains

Super narrow diameter grip

Low Battery Indicator

NEW Fumpa TPU Inner Tube Size:29" x 2.5" and this is made possibleTPU tubes offer many of the benefits of going tubeless; lighter faster wheel weight, superior road feel through the tyres, streamlined roadside repair kits and they also retain the convenience of using tubes. But electric bike pumps generate heat which can damage plastic valve stems. Smooth plastic valve stems can also make it difficult to attach your pump. Fumpa TPU tubes are optimised for use with electric bike pumps with textured metal valve stems