I have had these for a couple of years now and I've ridden it through the winter and summer. Only had to do basic maintenance on them from a cleaning and lube perspective. I haven't had to change the bearings, whilst a little colour has worn off on the contact points the rest of the anodising is as good as new. I must have put the best part of 2000km on them and still not missing a beat compared to the stock sram jockey wheels.