Abstract: A method is provided for determining a start offset between a video recording device and an inertial measurement unit (IMU) for use in synchronizing motion data of an object collected by the IMU attached to the object with video frames captured by an image sensor of the video recording device of the object in motion. The start offset is then used to synchronize subsequently captured video frames to subsequently collected IMU motion data.

Abstract: A wheel dolly for moving truck tires and drums to and from a wheel on a truck has an elongated frame for disposition on a base surface oriented in substantial axial alignment with the wheel of a vehicle. The frame has a pair of elongated and parallel spaced cylindrical members formed of sections which have telescoping adjacent ends. End braces extend across and are secured to the opposite ends of the cylindrical members. A carrier is slidably seated on the cylindrical members for movement therealong, and it has a planar central portion and angular portions depending therefrom outwardly of the frame to provide ramp surfaces. The carrier also has rollers supported on the lower surface of the central portion which are configured to seat on the cylindrical members.