Well going off what my friends and I do, we run 8 paddles on the 250s (’01 YZ, ’95 CR and 99 CR) and put the 10 paddle on the KX500. While I’m sure a 250 could run a 10 paddle tire I’d stick with the 8 paddles on the 250s. But if you already got a 10 paddle I don’t think there’s going to be any huge problems running it on the 250. Most concerns stem from that fact that riding deep sand puts a heavy load on the engine, even if you just run knobbies. (I did for a year before I put a paddle on, what a difference that made!) Having two more paddles on the tire will strain the engine more, but I’m not sure if it’s going to make you move any faster over the sand.