There are many options if you search the internet for bike trailers. I personally am averse to trailers that attach at the axel on one side of the rear stays (like the Burley). This places unusual stresses on the frame and makes controlling the bike hard at higher velocities attained on a downhill. I think that the best place to attach a trailer is at the seat post under your center of mass. Unfortunately, only a couple of brands do so. My own needs are a bit special as I have a special needs child who weighs about 60 pounds (full grown). I bought the Special Needs trailer made by Blue Sky Cycles, blueskycyclecarts.com. The quality and design are outstanding, and it will provide me service for years to come. My daughter loves cycling, it is one of our favorite things to do.