[Bicycle Trailer Spare Parts]:Bicycle trailer hitch has an overall one-piece design,can reduce the time you spend to look for suitable bicycle trailer headboards.It's a handy connection tool. [D-connecting pin fitted]:The secure locking pin and iron lining can ensure that the trailer head is firmly connected to the bike.The form-fitting design ensures that the screws of the trailer connection do not fall off easily.This improves the safety of the product. [Bike Trailer Attachment Made of Sturdy Metal Material]:Most of the products are made of metal,which guarantees not only the appearance of the product but also its lifespan. It is robust and does not rust easily.The nylon strap is wear and corrosion resistant,making it a good choice for your trip. [size of Bike Trailer Connector]:The package contains 1 bicycle trailer,the size is 20 * 2.8cm.The diameter of the shaft connection hole:1.1cm.Substrate length:5.5 cm.The diameter of the hole in the hook connected to the pendant:0.6 cm.The installation diameter of the expansion shaft nut: 2.2 cm. [Perfect fit with the bicycle]:Bicycle towbar is suitable for all types of bicycles and electric bicycles.Your mountain bikes,racing bikes and ladies bikes can be used with it.It's also combined with a variety of trailers that you can use to transport the bike of children,pets,and cargo.