【 EXCELLENT FUNCATION 】:The bicycle trailer coupler is the ideal way to achieve the goal of easily connecting the bicycle trailer to the bike. Allowing you to transport your little ones pet and cargo in safety and comfort that making them have a enjoyable ride, Especially family travel

Bicycle rear axle fixing hole diameter: 11 millimeters

Fixed hole diameter for trailer link: 7mm

Diameter of the concave area where the shaft nut is tightened: 21 millimeters

Bottom plate length: 55 millimeters

Used for children's trailers and most bicycles

Product size: 8 * 5.5 * 2.5cm

【 DURABLE CONSTRUCTION 】: Bicycle trailer hitch adapters are made of superior quality aluminum alloy and with black enamel coating. Using precision welding technology, they are hard to break, rust or corrode, suitable for long-term use

Durable construction