The Fly Bikes Piramide 2 rim has a double-wall design extruded from aluminium in a pyramid shape with triple pinned seam for greater structural support. Revised wall angle provides perfect spoke alignment and nipple head engagement, greatly increasing the wheel strength and stiffness. Bead Diameter: 406mm Height: 21mm Width: 34mm Seam: Triple Pinned Weight: 17.7 oz