Jockey wheels makes it easier to turn on / unload a loaded trailer on the hook
steel wheels
Makes it easier to manoeuvre a disconnected trailer

Code
Model
Wheel

90022
48 mm tube, solid rubber narrow
200 x 50 mm wheels

90023
48 mm tube, solid rubber wide
255 x 70 mm wheels

90024
48 mm tube, air rubber
260 x 85 mm wheels

N-90025
60 mm tube, automatic wheel support wheel
210 x 50 mm wheels

90026A
60 mm pipe, support wheel with grooves
210 x 50 mm wheels

80130
60 mm tube, solid rubber wide
250 x 70 mm wheels