Tetrarack M2 HD by Topeak is an upgraded rack system designed for cyclists who need to carry extra equipment during their journeys. This next-generation rack design offers a 66% increase in carrying capacity, with a maximum load of 20kg.The Tetrarack Enhanced Upgrade features an innovative top plate that can be adjusted on a convex track to ensure it remains level with the ground, regardless of the seat stay angle. It is suitable for attaching to MTB full suspension seat stays or rigid bikes without rack eyelets.The integrated QuickTrack system allows for easy attachment and release of Topeak TrunkBags with just the push of a button. The rack also features a hook and loop strap mounting system, which can be tightened securely to keep the load stable. This allows for mounting on a wide range of bikes.Please note that the TetraRack is not recommended for use with carbon forks and seat stays.The rack is made from a combination of aluminum, engineering grade polymer, and nylon straps. It attaches to seat stays with hook and loop straps and can be adjusted using strut slots. It is compatible with seat stays width within 95-125mm.The Tetrarack is also compatible with Topeak MTX/RX QuickTrack TrunkBags, KLICKfix/RackTime Snapit 1.0 or Vario system bags.The rack measures 47.5 x 38.5 x 13.5cm and weighs 1250g. It also features a clamp for a rear reflector and a tail light mount.