[sdcantrell56]

If you look closely at the model, the round silver discs one the inside of the frame are actually sprockets bolted to the axles. The chain will run from the transmission to the 2 center wheels and then from the center wheels to the outer wheels. It will be incredibly easy to replace a chain although I doubt we will have to as I have never broken a chain. We will also be using 25 series chain. everything about this drivetrain is incredibly easy to work on. We can switch a wheel in a matter of seconds to keep the tread fresh. Also tensioning is super easy.