Treks Removable Integrated Battery System (RIB) looks great and is user-friendly: The battery is completely integrated into the frame, ensuring optimal protection, and can be easily removed without tools, leaving space for a bottle cage.;This bike expands horizons: The top-quality Bosch system is suitable for daily commuting, recreational rides, and plenty of fun on the trails alike;The Purion controller features a Walk Assist function and an intelligent eMTB mode that automatically delivers the required power based on the terrain;Thanks to the external charging port, you can easily and conveniently charge the battery while it's in the frame or removed.