Schwinn 26-Lb Rear Bike Rack(1.09"L x 6.5"W x 16.73"H) $13.24 + Free S&H w/ Prime or $35+

Amazon.com has Schwinn Rear Bike Rack, 26 lb Capacity, Lightweight, Compact and Durable Construction, Fits Most Adult Bicycle Frames, Cargo Options for Backpack, Baskets & More, Bicycle Rack for Back of Bike for $13.24.
Shipping is free with Prime or on $35+ orders.

About:

• Easy Installation – Seat-post mount with adjustable fit; hardware included
• Lightweight & Durable – Strong aluminum alloy construction
• 26-Lb Capacity – Holds backpacks groceries baskets and more
• Wide Compatibility – Fits 24"–29" and 700c wheel sizes
• Versatile Storage – Rear platform for everyday commuting and rides

https://www.amazon.com/dp/B09SVKLQ4G