WTB NanoAir TPU Tube - 29 x 2.5 - 3.0 48mm Presta Valve Tire Bead-Wire The stock bolts are easily

The stock bolts are easily damaged when removing them to install a direct mount chainring

The ball shape also lowers sliding friction reducing the abrasive wear from the silica in the road

4″ width tires allow your Rider to traverse both pavement and dirt with plenty of control

model KOM Tough i40 size 27

WTB NanoAir TPU Tube - 29 x 2.5 - 3.0 48mm Presta Valve Tire Bead-Wire The stock bolts are easilyNanoAir TPU (Thermoplastic Polyurethane) tubes are light, compact and durable Packs down to one third the size of a traditional butyl tube and is less than half the weight Features a special construction layup that makes them more durable than traditional butyl tubes 2 TPU patches are included TECH SPECS model NanoAir material TPU tire size 29" tire width 2. 5 3. 0" valve Presta (threaded) length 48mm weight