The Tacx Jockey Wheels - S/Steel Bearings, are a must-have for riders who want to push to the limit, such as Fränk Schleck during the prologue to the Tour of California 2009. Tacx jockey wheels are amongst the best in the market. They are unique thanks to the choice of materials used and their composition. The very smooth running jockey wheels by Tacx are manufactured from a resin composite that is very resistant to wear and equipped with quality precision bearings. Thanks to the closed bearings they will not get stuck, show play or squeak. For extreme circumstances, such as in mountain biking or cyclo-cross. The wheels with stainless steel bearings, for minimal resistance and high performance, are very exclusive. They're a must have for all cyclists who want to push their limits!