How & When To Replace Your Derailleur Jockey Wheels

The jockey or pulley wheels on your bike do the job of both moving the chain across the cassette as well as keeping the chain tensioned. In the process, they turn thousands of times and get pretty gunked up and do wear out. Jon talks you through how and when to replace them. Subscribe: http://gcntech.co/subscribetogcntech The GCN Shop: http://gcntech.co/9b GCN Tech Uploader: https://upload.globalcyclingnetwork.c... What are you going to need? Firstly, some replacement pulley wheels. These do come in different sizes, so the number of teeth on them, and this is important as they need to be fit inside the cage of the derailleur as well as having the chain wrap around it too. I’ve tried using pulley wheels with more teeth, and they haven’t always worked well, if at all. Then of course you can have options with ceramic bearings that spin freely compared to standard bearings. Lets look at when they need replacing, if the teeth are very sharp or in the worst case, worn away. Then it is time for new ones. Or some have sealed bearings and whilst they can be temporarily revamped, it is a smarter option to replace the complete units, as after all they do need replacing. If you enjoyed this video, make sure to give it a thumbs up and share it with your friends. 👍 If you'd like to contribute captions and video info in your language, here's the link - http://gcntech.co/9a Watch more on GCN Tech... How To Service Bearings 📹 http://gcntech.co/cartridgebearings GCN Tech Show Ep. 34 📹 http://gcntech.co/show34 Music: Epidemic Sound Take Away - Camelian Glade Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto / http://www.bettiniphoto.net/ Brought to you by the world’s biggest cycling channel, the Global Cycling Network (GCN), GCN Tech goes deeper into the bikes, kit and technology stories that matter. GCN Tech is utterly obsessed with seeking out and showcasing the best in bikes, tech, products and upgrades. Everywhere. Every week. From news and rumours, first ride exclusives, how-tos, the weekly GCN Tech Show, pro bikes, set-up tips and more, we geek out over the tiny details that can make the big differences to you. With years of racing and industry expertise, we also bring you instructive maintenance videos to hone your mechanical skills, as well as behind the scenes factory tours and in-depth analysis of kit chosen by the pro peloton to keep your finger on the pulse of cycling’s latest technological innovations. Engage with us every week on the channel and across social media – we’re here to answer every question you’ve got on cycling tech. Suscribirse a GCN en Español: http://gcn.eu/Suscribirse Facebook - http://gcntech.co/gcntechfb Instagram - http://gcntech.co/gcntechinsta Twitter - http://gcntech.co/gcntechtweet