Tacx derailleur wheels are made of wear-resistant plastic and equipped with high-quality precision bearings. Thanks to the closed ball bearing circuit, there is no risk of the bearings seizing, playing or squeaking while cycling. Tacx derailleur wheels are available in 10-tooth and 11-tooth and for SRAM Race and MTB. For heavy conditions, such as mountain biking or cyclo-cross, there are wheels with stainless steel ball bearings. The derailleur wheels with ceramic bearings are very exclusive. These run extremely smoothly for even higher efficiency. With regular use, derailleur wheels are subject to wear and their operation becomes less efficient. Cyclists who often ride their bikes are advised to replace the wheels once a year. With new wheels, the chain runs smoother and quieter and you can shift more precisely. Tacx has more than 30 years of experience in making the best derailleur wheels.