Topeak MTXS BeamRack II Seatpost Mount Rack - A-Type Small Frames. The Topeak Beam Seatpost Mount Rack carries up to 20lbs and comes in three variations to cover different frame sizes. The quick release clamp allows for easy removal for weekend rides.

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