A adjustable caster mounting plate for moving modular structures or other heavy materials with a mounting plate, a caster assembly attached to the bottom of the mounting plate, a primary guide tab attached to the top of the mounting plate, a secondary guide tab attached to the top of the mounting plate, and a mounting tab disposed on the top surface of the mounting plate.

An adapter assembly that allows a wheel cover to be attached to a wheel has an inner device which locks through a central hole in the cover to an outer device insert. The inner device removably locks to a vehicle wheel, A The cam trapping cage secures a locking cam to a main wheel mounting clip with prongs that snap over the lip of the cam trapping cage, securing the assembly to the wheel hub centerbore. The locking cam physically blocks the mounting clip to keep them from backing out of their secured position. A silicone o-ring lies between the cover and the wheel lip, keeping the cover under constant tension for secure connection. Outside the cover, a billet hex nut and a hex nut o-ring reduces vibration and connects the cover to the inner device. A cap base with cam safety also prevents the locking cam from backing out.

A bicycle wheel comprises a rim and a valve assembly. The rim includes a radially inner wall having an inner opening and a radially outer wall having an outer opening. A first portion of the rim includes a first securing feature (e.g., inner threads). The valve assembly is positioned in the inner opening and outer opening and includes a second securing feature (e.g., outer threads) engaging the first securing feature. The rim can include a plate that defines the first engaging feature. The valve assembly preferably includes a valve stem and a resilient bumper coupled to the valve stem and aligned with a second portion of the rim. The valve assembly can further include a seal member compressed between the valve stem and the rim. Preferably, the seal member is positioned in an annular groove in an underside of an enlarged head of the valve stem.