Size: 700C (28") Finish: Annealed Ring Material: Aluminum Alloy Hole Quantity: 18 Front + 21 Rear Rim: QS1719 Double Rim 1 Pair Wheel (1 Front and Rear Wheel Set) Spokes (ABS Nipple, Blade Spoke, Stainless Steel 11/20 8/9/10/11 Speed For use with SHIMAN0/1 Speeds. 19C to Compatible with 28C tires. Weight: Approx. 6.9 lbs (1,990 g). Bike Type: Road bikes.