The Coaster 2 converts easily from a bike trailer to a stroller with both kids comfortably seated in a 5 point harness. Strolling wheel secures on board when used as a bike trailer. Securely attaches to your bike using a Thule ezHitch. Smoke-free, pet-free home. Always stored in garage and usedly lightly only in spring/summers. Original owners, 3 yrs old.