The 9004 Standard kit will allow you to convert your dock into a rolling dock.
*Designed for big docks*
The kit includes:
-1x Standard Wheels kit (9002-2);
-2x T-Brackets (9004);
-4x 1/2" PVC spacers (9007-12);
-2x Cotter pins (1136).
***Axle not included***
You will need 1-5/8'' diameter side pipes.
For the axle, you will need a 1-7/8'' of diameter pipe drilling at each end.
(Calculate 2 feet more, 1 foot per wheel, for the length)