The D401 is a tri rib (three ribbed) tyre for the front axles of tractors and is designed for minimum soil damage while it rides smoothly as it conforms to the furrows in the field.
The strong nylon belts and compound of the Deestone tri rib tyres are formulated to resist weather cracking and allows for great performance, excellent steering and long-lasting wear.
The D401 has been known to be used on the front of some vintage lawn tractors and small competition pulling tractors.