Today's high horsepower machines can out perform yesterday's drive belts. The Ultimax tradition of quality and innovation continues with the new Ultimax XS. It's the belt you've been waiting for to deliver peak performance and dependability never before available. Ultimax XS has increased strength and is built with new heat tolerant materials. With a revolutionary new compound, extra strong Aramid cord, and new manufacturing processes, Ultimax XS will run cooler, longer and faster. Extensive lab and field testing have proven that Ultimax XS can withstand the punishment that today's super-sleds dish out.