Aluminum alloy Sturdy aluminum alloy allows for a heavy duty loading. Bike rear rack mount break through space limits and add extra storage space. Great for excursions or picnic with family or friends, can help you easily transport enough daily necessities. Perfectly used with panniers, backpacks, baskets, storage bag, etc. Storage rack length - 32.5cm / 12.8 inch, the clamp under the storage rack is retractable, can be shrank or stretched from 37 - 50cm / 14.5 - 19.7 inch. You can freely adjusted the length according to your needs. Quick release mechanism makes installation a breeze. Fits almost all seat post diameter between 22.2 - 31.8 mm. Made of high strength aluminum alloy, durable and sturdy with high bite force. Not easy to fall off after the bite is tightened. If properly fastened to the bars the rear rack can hold up to 22lbs/10kg bearing. Universal suitable for most of bike, mountain bike, road bike, electric bicycle, commuter bikes, kids bikes, etc. Bike rear rack mount break through space limits and add extra storage space. Great for excursions or picnic with family or friends, can help you easily transport enough daily necessities. Perfectly used with panniers, backpacks, baskets, storage bag, etc.

Features:

--- Storage rack length - 32.5cm / 12.8 inch, the clamp under the storage rack is retractable, can be shrank or stretched from 37 - 50cm / 14.5 - 19.7 inch. You can freely adjusted the length according to your needs.

--- Quick release mechanism makes installation a breeze. Fits almost all seat post diameter between 22.2 - 31.8 mm.

--- Made of high strength aluminum alloy, durable and sturdy with high bite force. Not easy to fall off after the bite is tightened. If properly fastened to the bars the rear rack can hold up to 22lbs/10kg bearing.

--- Universal suitable for most of bike, mountain bike, road bike, electric bicycle, commuter bikes, kids bikes, etc.