Boat trailer wheels need to have chocks placed behind them for safety, when doing anything from parking to changing a tire. The chocks ensure that the trailer will not inadvertently roll anywhere and cause damage. Chocks are easy to make, and can be stored directly in the trailer. Scrap heaps at home improvement stores or lumber yards are the best place to find the wood for cheap.
Step 1 - Markings
Measure 1 1/2 inches in on each end of the wood and make an X. Measure 6 inches down the left side and make a small mark. Measure 12 inches down the right side and make another small mark.
Step 2 - Drilling Holes
Drill a hole through the entire piece of wood at each of the X markings. Feed 1 piece of rope through each hole, and tie the ends together.
Step 3 - Diagonal cut
Connect the marks made at 6 inches and 12 inches with a diagonal line. Cut the board clean through on the diagonal line. Sand the surfaces smooth if desired.