The Central Seatpost Bike Rack gives cyclists an easy and convenient way to securely pack on more gear during their rides. Tough and durable, it is constructed from aircraft-grade 6061 aluminum tubing. Requiring no frame mount, this rack can adjust fore and aft and can flip over for hassle-free installation. The Blackburn(R) Central Seatpost Bike Rack has a light and reflector mounting loop. FEATURES: Bike Rack Aircraft-grade 6061 aluminum tubing Adjusts fore and aft and can flip over for a better fit Light and reflector mounting loop No frame mounts required Fits seatposts 22-32mm in diameter Excellent with trunk bags