CushCore - Crush trail, not rims
CushCore® is a foam insert mounted in a 26, 27.5 or 29 inch MTB tire. It divides the inside of the tubeless tire into one part with air under the tread and a second part the CushCore insert mounted above the rim. They work together like a spring and a damper. It is also an effective impact protection especially on hardtails, lowers rolling resistance, increases traction and grip.