Cushcore Trail Tire Insert - 27.5/29" Mixed PairThird party testing has revealed that, compared to a standard tubeless setup, Cush Core provides a 12% smoother ride, 35% more sidewall stability, 16% less suspension travel consumption, 3% less rolling resistance, and 50% less impact force transferred to the rim This system is designed to be used with tubeless ready or tubeless converted mountain bike rims and tires, as well as standard tubeless sealant Doesnt absorb sealant Includes special tubeless