Maurer Manufacturing offers a complete line of high quality aluminum grain trailers. Manufactured in Spencer, Iowa, Maurer aluminum grain trailers are designed for the grain harvester, by the grain harvester. Maurer aluminum grain trailers are single wall constructed with an exterior designed for ease of pulling and engineered for durability while moving in and out of the field. Maurer grain trailer lengths range from 28 feet to 48 feet. Offered in both spring ride and air ride configurations, there are multiple options to customize each trailer for every grower’s individual needs.