The newly designed extended and widened version of the MTX BEAMRACK is better suited for 29” MTB and gravel bikes. It features an MTX QuickTrack® panel compatible with MTX 1.0 and 2.0 system bags and baskets. Flip the panel to adapt it for bags and baskets from other brands. Material: Aluminum Clamp: Fits ø25.4 - ø31.8 mm seatpost shims Incl. Max load: 9kg / 20lbs Bag compatibility: Topeak MTX RX TrunkBags Size: E Type: 51.7 x 12 x 8.9 cm V Type: 50 x 12 x 11.4 cm  A Type: 53.9 x 12 x 12.9 cm  Weight: E Type: 673 g V Type: 703 g A Type: 722 g