The 9006 STD kit will allow you to convert your floating dock into a rolling dock.
*Designed for medium-size docks up to 800 lbs maximum*
The kit includes:
-2x Standards Wheels kit (9002-2);
-1x Reinforced L-Brackets kit (9006);
-4x 1/2'' PVC spacers (9007-12);
-2x Cotter pins (1136).
You will need 1-7/8'' diameter side pipes.