The Cub Cadet® PRO X 636 36-in. 18.5 HP* Commercial Stand-On Lawn Mower features a fully fabricated 10-gauge steel commercial deck shell with top, bottom and side reinforcements. Standard 21-in. tires are designed to give you ground clearance to easily hop on curbs. A large, fully adjustable suspension platform is engineered to allow you to glide comfortably through tough terrains.