Bridgestone Battlecross X20 Rear Motorcycle Tire 100/90-19 57M

The Bridgestone Battlecross X20 Rear Motorcycle Tire 100/90-19 57M is a bias-construction motocross rear tire made in Japan and built for soft-terrain riding conditions. Bridgestone developed it on the race track alongside professional riders in top motocross competitions, and the company says it serves everyone from championship competitors to young beginners. It introduces Castle Block technology and a redesigned block pattern with increased stiffness and edge component, which Bridgestone says boosts traction and cornering grip on muddy tracks, slippery sand, and softer terrain while also widening the tire's usable range on firmer ground.

This tire uses a metric size code of 100/90-19, where 100 is the section width in millimetres, 90 is the aspect ratio as a percentage of that width, and 19 is the rim diameter in inches. The rim diameter must match your wheel, and the full size code should match what is printed on the sidewall of the tire you are replacing. It carries a load index of 57 and a speed rating of M, which covers speeds up to 81 mph (130 km/h); your machine's specifications determine which load index and speed rating are required.

Specifications