Michelin Force XC2 Race Tire - 29 x 2.10 Tubeless Folding BLK Racing Line GUM-X Cross Shield E-BikeMichelin Force XC2 Race Tire 29 x 2. 10 Tubeless Folding Black Racing Line GUM X Cross Shield E Bike. The next generation Force XC2 Race Tire provides fast and nimble handling whatever theconditions. Design enhances control in a wide range of riding conditions thanks to the updated tread pattern with taller wide spaced knobs Gum X compound optimizes the balance between rolling efficiency and traction Cross Shield 2 casing provides extra pinch