Economical easy to build engine dolly

krazykuda said

I buy my casters from a tool outlet and get beefy ones... I think the ones I have are 3" diameter and rated for 350 lbs each...

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I like the 5 or 6 inch diameter casters. I have dirt/grass/gravel in front of my shop and if I ever need to load on on a trailer for instance, the bigger wheels roll right over uneven terrain.