The rugged Cub bike trailer for kids is built for heavy duty use in harsh conditions. It features a double-walled, molded bottom for extra durability and an adjustable suspension system to ensure a smooth, quiet ride on any road. Spring Integrated Technology ( S.I.T.™) seating prevents tangled straps and simplifies getting your children in and out of the trailer. The Cub has all-kit compatibility for optional conversions from bike trailer to a stroller, jogger or sled. Share your love for the outdoors with your kids in the Burley Cub.