A top quality sealed Stainless Steel bearing that's not going to rust (replacement available here)

There are a large number of bike frames out there that have no chance of being mounted to a mast style bike carrier due to an incompatible top tube design

Long lasting and sweat resistant

It uses hardened steel breaker pins and you get a spare included with the unit which is pin stored in the handle

PRO Alloy Bottle Cage - Black - Red PDP|Colour A top quality sealed StainlessLightweight alloy cage from PRO. With all the awkward bottle mount locations of bikes these days, you need a dependable cage that will securely hold your bottle over the roughest terrain. Constructed from lightweight aluminium, you'll hardly know its there! Perfect for riders who don't want to worry about their bottle falling out. Features: 48g. Aluminium. Securely holds standard size bottles. Compatible with standard cage mounts.