Hello all. I have been using 26x1.5" Primo Comets on my DF bike for 2 years. I have been quite happy with them, but they will need to be replaced next spring. While looking for replacements, I have found that they are marketed as recumbent tires. Why is this? Is there any difference between a recumbent and DF bike tire? Any reason they should not be used on a DF bike?