Topeak MTX BeamRack II Seatpost Mount Rack Description: The Topeak MTX BeamRack II Seatpost Mount Rack builds on the adaptive design of the popular Topeak Beamrack by crafting the beam arm of the rack to better suit the nuances of varying wheel and frame designs. Utilize either the dual-bungee cord system for cargo management, or connect a Topeak MTX 1.0 or MTX 2.0 system bag/basket to the QuickTrack panel for locked affixment of your goods. Features: Seatpost attached rear cargo rack suited for 29" MTB and gravel bikes V-Type beam design makes an ideal fit for larger frames MTX QuickTrack panel is compatible with Topeak MTX 1.0 and MTX 2.0 system bags/baskets Rear light mount is compatible with a variety of light styles and sizes Integrated rubber bungee cable helps secure loose cargo Specifications: Color: Black Material: Aluminum Clamp: Fits 25.4 - 31.8mm seatpost s Weight: 673g Max Load: 9kg / 20lbs