The maximum weight capacity that the bike trailers on our list can carry vary from brand to brand. Generally, however, most bike trailers for kids can carry a weight range of anywhere between 85 to 125 pounds. Many parents find that this is quite a generous weight capacity given that most small children under 6 years old rarely reach the maximum weight. This is also great for families who like to use their bike trailers as occasional gear carriers, especially on camping trips or extended trail rides. With all that room for weight, some people even put their labrador retriever in these bike trailers with zero problems!