The Tetrarack R2 from Topeak is a one size fits all rear rack that s for Road, Gravel, Cross Hybrid and Touring bikes. It features an innovative top plate that adjusts to level independent the seat stay angle. Integrated QuickTrack system allows Topeak TrunkBags to slide and lock into place and release with the push of a button. Innovative hook and loop strap mounting system cinches down tight to keep the load stable and allow mounting on a wide range of bikes.Attachments: Seat stays with hook and loop strapsAdjustment: Strut slotsMaterial: Aluminium / Engineering grade polymer / Nylon strapsCompatibility: Topeak MTX / RX TrunkBagsMax Load: 9kg / 20lbAdded Feature: Clamp for rear reflector, Tail Light MountSize: 39.5x30x12cm / 15.6 x11.8x4.7 Please note:*TetraRack is not recommended for carbon forks and seat stays*TetraRack series racks are not compatible with front or rear mounted V-Brake type systems