100% Race Specialists. Our Vectran and Black Chili technologies have been radically applied to this uncompromising race tire set, specifically developed for the needs of the front and rear wheels. The new GP Attack benefits from its special Black Chili compoud that gives the streamlined 22 mm front tire more grip with lower rolling resistance. The new GP Force is a powerful rear wheel specialist and with its 24 mm section combined with a fast Black Chili compound, it gives excellent traction and road handling thats second to none. Both tires are made with Vectran puncture protection and show wear and tear levels via indicators in the tread, details that show professionals are at work.