Fumpa TPU tubes are optimised for use with electric bike pumps with threaded, heat-resistant metal valve stems which work perfectly with Fumpa, other electric bike pumps, as well as traditional floor and hand pumps.
TPU tubes offer many of the benefits of going tubeless: lighter/faster wheel-weight, puncture and pinch-flat resistance, sup
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While I like the metal valve stem because I use an electric mini pump which heated the plastic stem on a different brand and caused the valve to be pushed in a bit which leaked. These still leak which must be at the junction between the valve stem and the tube itself.