Topeak Beam Rack Seatpost Mount Rack constructed of tough 6061 T6 aluminum. Features: Fits 25.4-31.8 mm seat posts Tough 6061 T6 aluminum construction Hinged seat post clamp with aluminum quick release lever Perfect for mountain and trekking bikes Carries 20 lbs and loads with ease Specifications: Seatpost Diameter: 25.4-31.8mm Weight Limit (lbs): 20lbs Material: Aluminum Weight: 680g Tube Diameter: 6.4mm Platform Dimensions: 21.3 x 5" Shop MTX compatible trunk bags.
