I have run standard tourances on my gsa for the nine years I've owned it, they are far from lead boots in my opinion,, great handling last well, I'm putting another set on in 2 weeks before I go up to the nordcapp and back down through Finland, I am confident they will also last long enough to do 5,000 miles in the 3 weeks we are away. Cheap to buy as well at less than 150 quid a pair.