The new Booster is a World Cup proven XC race tyre that is aggressive enough to push traction to new limits. On top of that it is also one of the fastest and lightest XC tyres on the market. You no longer want to choose between a XC tyre that is either fast and light or provides great traction? The all new Booster combines the best of both worlds. Fast &- Grippy New race compound - The Booster utilizes a newly developed race compound that is fast and grippy especially on dry loose over hard and rough and rocky terrain.