Fits perfectly on a post 1.25 inches, must use shims for smaller diameter posts, attaches to the seat post only. Seat post must be removed from the bike to install; use the included plastic shims to create a tight fit between the rack and the seat post. Comes with 3 Seat post shims to mount the seat post to the seat tube of the bicycle. Side rails are ideal for mounting pannier bags; come with extra tie down points for securing the load. Rear rack mounts easily to seat post, lightweight compact design, alloy construction carries up to 20 lbs.

Orientation: Rear. Load Capacity: 20 pound. Mounting Type: Rear Seat Mount. Material: Aluminum. Brand: Schwinn. Color: Black. Date First Available: December 15, 2009. Best Sellers Rank: #18,814 in Sports & Outdoors. Customer Reviews: 4.4 out of 5 stars 3,456 ratings 4.4 out of 5 stars. : B0030RS5CA. Sport Type: ?Cycling. Size: ?Rear Rack. Included Components: ?Seat Post Shims. Style: ?Rear Rack. Part Number: ?2121433. Manufacturer: ?Schwinn. Suggested Users: ?Unisex-adult. Material: ?Aluminum. Color: ?Black. Model Name: ?Dlx Alloy Rear Rack. Warranty Description: ?Limited Lifetime Warranty. Country of Origin: ?United States. Brand Name: ?Schwinn. Package Weight: ?0.67 Kilograms. Item Package Dimensions L x W x H: ?19.76 x 5.83 x 4.06 inches.