I used quite a few pairs of Tourances on my GS that I had. They are fine and grip quite well but the noise on corners was loud and annoying. I then turned to Conti Trail Attacks which gripped better and the ride was smoother but as good on fire trails. The tread in very deap on the original tourance so lasted ages if you can out up with the noise and ride.

The Siracs I have are quite good I think and quieter!