Longer seat allows for a passenger while being more compact than the 1+1 seat. Easy, toolless installation. Complete assembly features a passenger strap. Tunnel capacity is maintained for additional accessories. 180 mm height (7"). Battery cover with support (860201720) required for REV Gen4 (Narrow) without battery. Battery cover with support (511001210) required for REV Gen4 (Narrow) with battery. - REV Gen5 (Trail), Neo, REV Gen4 16"