Yep. Absolutely terrible. Alas, they were on the bike when I bought it three years ago. I rode one twin shock trial in the dry which was fine. And then a muddy trial in the twinshock class and it was a nightmare - spinning out on everything. I had a TY175 back in 1981 which I used as my road bike to get around locally on and even that gripped better with a few hundred miles on same tyres.