Tacx T4020 Sealed Jockey Wheels - for use with Shimano 7/8 Speed & Campagnolo 8/9/10 Speed

Anyone who cycles has to replace their jockey wheels once in a while. With racing bikes normally once a year, with mountain bikes a couple of times per season is not uncommon. For well-working gears, Tacx delivers the perfect guides. The closed ball-bearing circuit prevents the jockey wheels from jamming, play and irritating noises during cycling. Ideal gear shifting with the narrow wheel above (UPPER) and the wider wheel below (LOWER). The durable, self-lubricating plastic combined with high-grade precision bearings, guarantee wheels that continue to turn easily, even under extreme conditions.