SWorkz have designed a new S12-2 rear wheel hub system called the ‘Synthesis’ rear hub set. This optional part is made from high quality aluminium with a redesigned geometry for the rear upper linkage that can be changed between 6 positions. You can also adjust the upper linkage ball positions using different thickness washers. With this new system it is very easy to change the rear hub positions to suit all different kinds of tracks. The set includes a pair of hubs, upper linkage mounting points and plastic inserts.