Vittoria Air-Liner Protect E-Bike MTB Insert. Features: Epitomizes superior design and cutting edge materials, delivering the ultimate in tire support for electric mountain bikers Engineered to endure the significant impacts and stresses associated with e-bike use, this insert ensures that cyclists can ride with confidence, no matter the obstacles they might face In case of a puncture, you can ride up to 50km in run-flat mode. You can get home easily and repair the damage in a later moment Cornering support increased Valve included Specs: Model:Air-Liner Protect E-Bike Size:29" Tire W:2.4-2.6" Rim W:25-30mm Package:each Weight:145g