Facility Enhancements > Pedal Karts XL 4 Bottom Bracket Cartridge Details Related Articles Gallery The XL 4 Bottom Bracket Cartridge is a replacement part for Prime Karts XL 4 pedal kart Models. $30 XL 4 Bottom Bracket Cartridge quantity Add to cart Questions? Contact Us Others also viewed… Spraypoint® Splashpad® Playable Fountains Water Journey™ You may also like… XL 4 “Charger” Custom Graphics Racer Front Spoiler Racer Tire Prime Kart Chain Break Tool