Odyssey OPTIS Tubeless Tire Insert Two Chambers, Zero Compromises Pressure choice is always a compromise between grip, protection, and support, but the OPTIS Tubeless Tire Insert eliminates that trade-off. Unlike foam inserts, OPTIS is a pneumatic system that installs like a traditional tube and actively presses the tire bead into the rim. Inflated to a higher pressure than the tire itself, it separates support pressure from tire pressure, letting riders run significantly lower tire pressures for increased grip and control without sacrificing stability, protection, or durability. Features Pneumatic dual-chamber design lets you tune tire pressure and insert pressure independently for grip and support Prevents tire burping by pressing the tire firmly against the rim and closing gaps that would otherwise open under load Protects rims and tires from hard impacts while allowing significantly lower tire pressures for increased grip Temporary run-flat capability locks the tire bead to the rim for a short window if the tire is critically damaged Significantly lighter than traditional foam inserts, helping offset weight elsewhere on the wheel Easy installation that also helps with tire seating during setup SPECIFICATIONSIntended Use MTB, Dirt Jump, Low-Pressure Tubeless Setups System Type Pneumatic (reinforced TPU bladder, dual-valve inflation)Compatibility Compatible OPTIS valve required (sold separately) | Odyssey | Optis Tubeless Tire Insert 29"x28-40Mm