Puncture resistant tubes, sometimes called thorn proof, have an outer wall that is three times as thick as a standard tube (see the cross section photo) and this extra thickness dramatically reduces the risk of puncture.

In our experience they will decrease your chance of getting a flat by more than 95%. They also hold air much longer than standard tubes, usually only needing to be inflated once every 6-8 weeks.

The downside is they cost and weigh more.

They typically weigh around 200g more than a standard tube, about half a pound per tube of additional rotating mass on your bike.

These tubes are the best choice for heavier and difficult to change e-Bike wheels.