High ground clearance. The 4041 is a full 15" above the ground, to clear row crops easily and work better in snow or soft soil. Even with removable drawbar in place, clearance is still 13".
Big disc brakes. Plenty of stopping power from two disc brakes on rear wheels. Can be operated independently to aid in turning or controlling slippage, or simultaneously for safe, sure stops.
(Source: The New Size Tractor Simplicity 4041, Form 21-008, hand-dated 10-17-72, courtesy of Chris Geise)