For dual sport tires, they're often described as being 90/10 street/dirt, or maybe 30/70 or 50/50. Is there one place to get a consistent rating for the popular dual sport tires for how much they're aimed at street or dirt use? I ask, because I just put a set of Heidenau K60 tires on my KTM and they're supposedly rated as a 50/50 tire. The ones that came off of that bike were Continental Trail Attacks, which I think are 90/10. Based on how they work for street and dirt riding, I would agree with that. But I also have IRC GP-110 tires on my XR650L which are often listed as 90/10. Although they're great on the street (the 90% part), they seem better than the "10" would suggest off road. However, my spare wheels Have TCK-80's on them and I don't know how those are rated. Definitely better in the dirt than the IRCs, but I don't know if those are considered to be 50/50 tires or not. I don't like them as well on the street as the K60's. So is there some place with a list of all the top brands of street legal tires aimed at some dirt riding with ratings of how much street/dirt they are designed for?