Optis Tubeless Tire Insert - 27.5" x 28-40mm Insert w/ Standard Presta Valve MFPN=4196300 Gender/Age Adult Rotational Protection No RockShox Reba SIDB Solo

Optis Tubeless Tire Insert 27.5" x 28 40mm Insert w Standard Presta Valve MFPN=4196300 Gender Age Adult Rotational Protection No RockShox Reba SIDB Solo Gender Age Adult Rotational Protection No Minimum Head Circumference 59 Color Race Grey Size Large Visor Included No Multi Impact No Weight 290 Helmet Certifications Complies with the U Weight: 188 g Riders can separately tune the tire's grip and internal support through a dual valve design allowing for lower tire pressures and ride characteristics that would not be possible with a traditional tubeless or foam insert set up Rolling efficiency is greatly improved on rough surfaces without the hysteresis losses often associated with foam inserts