Competition use chain guide for competitive riders | Used in the E-Xplorer event to stop chain de-railing and rear sprockets from bending

This in-house EBMX design has a slider mechanism to work with 46T-53T rear sprockets, it's strong enough to do the job but also designed to bend out of the way & not crack the aluminum standoffs in a large impact event. 

Once you've committed to an upgraded controller, motor, & battery the existing design pulls & stretches the chain to the point of component failure; even a 520 chain was not designed for the electric torque these bikes can produce. If you're pushing it on the track or just an aggressive rider running a fully upgraded bike, a chain guide is a must to save your rear sprocket & to stop losing your chain on impact landings.