This comes assembled with X-Treme aluminum rim, spokes and Joy tech black front wheel hub for the Trail Maker, Trail Climber & X-Cursion Elite bicycles. This version 2 is interchangeable with the version 1 wheel. The only difference would be that the version 1 has a chrome front wheel hub and the version 2 has black. You can upgrade to this version if you have a non-elite bike. Fits 24 Volt Bikes and 36 Volt Bikes