The Dragons that come on the Triumph are the same that come on Ducs. They are an unknown compound. If you inspect the tire, there is no compound designation, so who knows what they are. It's funny, I raced on the Dragons for years and I always thought that they sucked in the rain, bit then when the new Diablos came out, we used the Dragons as intermediate (wet and damp track) tires- strange. The warmers are always helpful at track days; When I started racing there weren't any tire warmers, so you warmed the tires on the first couple of laps. Back then the tires were mostly Bias ply- damn I'm old.