Dunlop Harley Davidson D401 Whitewall Front Tire (Wide Whitewall / 100/90-19) The D401 is the approved Harley-Davidson&#174; cruiser tire. An advanced tread pattern and specifically formulated compound helps deliver impressive grip in wet and dry conditions and helps provide long tire life. D401 tires use bias or bias-belted construction and incorporate a computer-optimized tread profile to help promote even wear. The Dunlop Harley-Davidson&#174; Tire Series feature special Harley-Davidson&#174; branding on the sidewalls. Tubeless whitewall.