The new lightweight rim from NoTubes which will replace the Olympic.The ZTR Alpine has the next generation BST (bead socket). A wider inside rim cavity with shorter sidewalls means improved tyre performance at equivalent pressures as well as decreased pinch flats.The Alpine does not require a rimstrip to run tyres tubeless.Weight approx 345g32h or 28hWhite23.2mm wideERD 536Features next generation BST (Bead socket) creating a wider rim cavity with shorter sidewalls.Use 21mm yellow tape with this rim.