Rear Bike Rack Carrier Seat Size33 x 12cm /12.8 x 4.7 in (L x W). Length can be adjusted. Applicable for most bicycles, Such as road bike, mountain bike, fat bike, etc.(Kids' bike can not be used ). FunctionAdjustable quick release clamp design. Fits round seat tube. Multifunction rack,it's also a fender for your bike. The Bike Rear Racks is easy to install and remove. Make your luggage not scratched by the wheel or spokes. Ideally used with panniers, backpacks, baskets, etc MaterialBicycle luggage carrier made of premium aluminum alloy. Corrosion-resistant, more durable, more light. With black paint, bicycle rear rack can protect the luggage cargo rack from rust and scratches. Load capacity up to 10 KG/22 lb, help you easily transport your luggage, fit your most occasion need. Simple InstallationOur rear bike rack can be attached to the seat tube by simply fastening the screw. You can adjust the length of the rear shelf, the length, the bottom is hexagonal tight. All required nuts, bolts & washers are included.Length can be adjusted by screw to meet your needs. ApplicationThe bike rear rack is perfect for a long cycling trip and excursions to embracing enough daily necessities. The adjustable structure allows you adjust the rack lenth as you wanted. Elastic cord stretches around your carrier bag for extra security while riding on tough road.