Check out these unique derailleur pulleys from leonardifactory - not oversized on the tooth count, but the bearings on the inside are much larger diameter than normal for smoother rolling performance. . Lots more cool stuff from them and others coming all week/weekend from seaotterclassic . #seaotterclassic #seaotterclassic2019 #leonardifactory #upgrade #bikehacks #derailleur #mtb #mountainbike #cycling