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Bike Trailer -- tough and light

Step 8Build and Attach Coupler

Build and Attach Coupler
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Cut two lengths of angle iron to 3 1/2 inches. Chop or grind down one edge of each piece so that there's no more than 3/4 inch left of the leg.

Nest these two pieces together and bolt to the end of the tongue. Jam cut washers between tongue and coupler so that the coupler fits inside the caster wheel receiver, but not tightly, as a little play is good here. This should take about 14 cut washers total, but it depends on the side of your caster wheel and washers.
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Author:arcraven(andycraven dot net)