The Thule Thru Axle Maxle Adapter replaces the 12 mm Maxle rear axle on your bike. This allows you to attach a Thule ezHitch so you can tow a Thule child carrier or multisport trailer. It works with the Thule Cheetah, Cadence, Chariot or Coaster trailers and is simple and easy to install. It is 12 mm in diameter and for use with 217 mm or 229 mm length Maxle axles with a M12 x 1.75 mm thread pitch.