Abstract: A shock absorbing suspension system for a lightweight, bicycle pulled trailer, fitted to the frame of a light weight trailer. The trailer suspension system includes a pair of shock absorbers each mounted to cushion the trailer and its contents, which can be a passenger. The suspension system mounts to a trailer frame that has a shock base and an arm base. The shock base includes a shock base pivot and the arm base includes an arm base pivot. A wheel arm attaches to the arm base of the trailer frame. The wheel arm includes a hub end and a pivot end, and the pivot end hingably connects to the arm base pivot. A wheel hub is received into the wheel arm proximate the hub end of the wheel arm. An arm shock bearing is positioned on the wheel arm. A shock, for dampening the hinging of the wheel arm about the arm base pivot, is mounted between the trailer frame and the wheel arm. The shock includes a base bearing and an arm bearing.

Abstract: A set of add-on front castors or casters, configured for attachment to a conventional three wheeled jogging stroller. The add-on front castor set includes a crossbar with a first crossbar end, a second crossbar end and a mid-crossbar. A first castor mounts proximate the first crossbar end and a second castor mounts proximate the second crossbar end The add-on front castor set also includes a fork clamp that mounts proximate the mid-crossbar. The fork clamp is attachable to a front wheel fork of the jogging stroller. The front wheel fork is configured to accept a hubbed axle of the single forward wheel that is detachable to so that the front wheel fork can receive the fork clamp of the add-on front castor set. The fork clamp of the front castor set is attached to the front fork by first inserting the front fork between a top clamp plate a bottom clamp plate. A clamp screw threads between the top clamp plate and the bottom clamp plate, and a clamp knob is mounted to an end of the clamp screw.

Abstract: A set of add-on front castors or casters, configured for attachment to a conventional three wheeled jogging stroller. The add-on front castor set includes a crossbar with a first crossbar end, a second crossbar end and a mid-crossbar. A first castor mounts proximate the first crossbar end and a second castor mounts proximate the second crossbar end. The add-on front castor set also includes a fork clamp that mounts proximate the mid-crossbar. The fork clamp is attachable to a front wheel fork of the jogging stroller. The front wheel fork is configured to accept a hubbed axle of the single forward wheel that is detachable to so that the front wheel fork can receive the fork clamp of the add-on front castor set. The fork clamp of the front castor set is attached to the front fork by first inserting the front fork between a top clamp plate a bottom clamp plate. A clamp screw threads between the top clamp plate and the bottom clamp plate, and a clamp knob is mounted to an end of the clamp screw.

Abstract: A convertible trailer and stroller having, a pair of frame blocks mount to a frame member of a jogging stroller, each proximate the two rear wheels of the jogging stroller. The frame blocks are each attached to a wheel block at a wheel pivot that interconnect the frame blocks to their respective wheel blocks. A pair of wheels having hub axle ends are received into a wheel bearing within each of the wheel blocks, and the wheel blocks are rotatable about the respective block pivots to selectably raise or lower each wheel relative to the block pivots. In the lowered wheel, or stroller configuration, a high ground clearance for all terrain operation is provided, while in the raised wheel or trailer configuration, a low and stable center of gravity is provided. The convertible trailer and stroller can also include an upper bar that attaches to the wheel blocks.