Roland ZAC2000 rear wheel 28 inch General specifications: Color: black Suitable for 7 speed Suitable for pawn Material: Stainless steel Inch size: 28 x 1 5/8 x 1 3/8 inch ETRTO size: 37-622 Position: rear Weight: 1490 grams Rim specifications: Brand: Ryde Model: ZAC2000 Width: 24.6 mm Inner width: 18.6 mm Height: 23.2 mm Valve hole: 8.3 mm Spoke specifications: Number: 36 Spoke thickness: 13G (2.34 mm) Material: Stainless steel Hub specifications: Installation width: 130 mm Axle length: 135 mm Material: steel Type: fixed hub (nut mounting)