The new 9R/9RT Series of scraper tractors from Deere includes three track models (designated with "RT") and three wheeled models (designated with an "R"), ranging from 460 to 560 horsepower. Deere's 9460RT, 9510RT and 9560RT are equipped with four-ply 30-inch-wide rubber tracks designed for soft, low-friction and uneven ground, as well as resistance to high side loads.