Various Minoura adapters for using 12mm Thru-axle bikes on fixed rear wheel trainers Compatible with LR961, LR541, LR341, LR960, LR540, LR340, LR240, MagRide-Q, and RDA2429 trainersRequires the use of a QR skewer - not included12mmx1.0X12 TaperedSilverUPC/EAN/GTIN: 4944924407216