The Bike-Hod hitch, pictured above, is made in three sizes, to fit 28mm, 32mm and 36mm seat posts. Once fitted, it takes about five seconds to attach your Bike-Hod to the bike - and the patented hitch allows the trailer to follow the bike round corners up and down bumps, while at the same time adding stability because of its resistance to twisting. The usual comment on a Bike-Hod being hitched up and tested for the first time is "you don't know it's there".
Alternatively, you can order a towarm fitted with a Weber hitch, pictured below, at extra cost. The Weber hitch allows you to attach your trailer with a twist and a click, and is a proven load carrier.