ODYSSEY Optis 27.5" Anti-Pinch Flat Insert with Dual Valve

The ODYSSEY OPTIS MTB pneumatic insert offers an innovative alternative to traditional foam tubeless inserts. The OPTIS (Odyssey Pneumatic Tire Insert System) is based on an independent inflatable insert, installed inside the tyre and maintained at a higher pressure than the tyre itself.

This design allows you to lower tyre pressure to gain grip and comfort on rough terrain, while maintaining excellent support thanks to the high-pressure insert. Odyssey recommends as a starting point reducing your usual tyre pressure by around 10% and inflating the OPTIS to approximately 25% above the desired tyre pressure. For off-road riding, the brand indicates that a pressure reduction of around 15% can also be considered depending on the rider and the terrain.

In the event of a heavy impact, the OPTIS also forms a pneumatic barrier between the tyre and the rim, reducing the risk of pinch flats and rim damage. At the same time, its pressure helps to hold the tyre beads against the rim, significantly reducing burping and air loss during heavy cornering loads.

In the event of a puncture resulting in a total loss of tyre pressure, the insert temporarily continues to hold the tyre on the rim. This run-flat function is designed to give the rider more control while slowing down and coming to a stop; Odyssey specifies that it should not be considered as allowing you to continue riding normally on a flat tyre.

Finally, unlike many foam inserts, the OPTIS is installed in a similar way to a standard inner tube. During inflation, the insert also pushes the tyre beads outwards, making them easier to seat on the rim. The system is available in 27.5" and 29" for MTB rims with an internal width of 30 to 40 mm.

Ref: 16112484057468