A mounting (10) for a jockey wheel assembly has a first member (14), a second member (18) and a locking pin (32). A release handle (42) is connected at a first location to the locking pin (32) for drawing the locking pin (32) along a generally linear path and has a contact portion (52) remote from the first location. The contact portion (52) is for engagement with a bearing surface allowing the handle (42) to be rotated relative to the locking pin (32) about the first location whilst the contact portion (52) slides relative to the bearing surface.