The three models in the expanded CRT 48 ride-on trowel series feature improved steering, a torsion-assist steering system, and an engineered clutch and belt specifically designed for durability. Within the CRT series, three engine options are available: 34-hp liquid-cooled Vanguard engine, 35-hp air-cooled value Vanguard engine, or four-cylinder 35-hp liquid cooled diesel engine. Speeds on the 48-in. trowel range from 20 to 165 rpm. Wacker Neuson Corp. 800-770-0957.