I have a trailer with a rubber-torsion axle (axle is fixed to chassis, hubs are mounted to swing arms that are embedded in the ends of the rubber-filled tube axle). Since the swing arms move only in the vertical plane, and cannot move side-to-side, I assume I can fit wheels/tires that have minimal clearance from the trailer chassis. What is a reasonable minimum clearance between the inner side of the wheel/tire assembly and the nearest part of the trailer chassis?

migrated from engineering.stackexchange.com Jul 6 '15 at 18:57

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This would depend a great deal on the load carried and the tyre pressure. The tyres will Flex and bulge somewhat and can fail if allowed to rub against the chassis. My trailer has a couple of inches clearance.

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