We have completely changed what every other fat tire bike manufacturer is doing. Others fat tire wheel set designs allow the tires width to dictate the tires height, where current tires are approximately 110 to 120 mm wide and 100 mm+ in height.
This causes two issues:
First, it causes extra weight is the tire giving you additional mass to rotate.
Second, it gives you a large tire tread radius which forces you to deflate the tire to get a maximum foot print for soft terrain like sand, mud and snow, and is not as stable of a foot print for downhill racing.
By shortening the tire side walls it changes the tread radius and gives you the same foot print other tires achieve by deflating the tire. This tire gets fully inflated and now you have much less, 2” less, of side wall on each side, better rotational mass, and a much larger foot print, and a tire which is much has more stability. We have not only redesigned the 26" wheel system to make it almost 2 lbs lighter then any other system available, but we have also designed are 29er rim and wheel system creating the lightest system with the largest circumference.
By taking the 29ers' concept, and making the rims 25.2” OD Diameter, you have the same OD of the whole tire system as the existing tires have, (even about ½” more), and much less mass. The results achieving is the same distance traveled, (if not more) per rotation as the tire is ¼” to ½” taller. The last issue is that all the currently designed holed/lighter rims are not symmetrical , they all have holes missing on the top and bottom on these rims, this will cause issues with rotation as speeds are increased , like downhill racing . We have taken that issue and resolved that as well. These changes solve the issues faced with the Fat Tire Wheel System. This design is patented by our company and now has acheived world record status.
PLUS, Surly's new Knard 29er tire fits on our patented rims to create a wheel system that is lighter than any 100mm 26" Tire on the Market!