They are a nice tyre, but dont think they are strictly road legal.

I bought a pair of them and they did say not for highway use or something like that on the side. Well...they used to say that lol.

Cant really comment how good as only used them at TOTB and there was no chance of them gripping anyway.

If it's for road/track I'd just go for a more normal tyre like the RSR. Ive had some kuhmo's on the past. They dont stay road legal for long.