Well then, firstly, the tyre was 170 quid fitted to a loose wheel. I almost fainted but my o my their good them Dragon Supercorsa Pro's. The vats a killer and tyres in general seemed to have gone up about 30% in the last couple of years.
They had a few sets of them fancy new Maxxis, not in our size yet though, with the scuffing on the sides for 170 quid a pair. He said he was selling a few sets but no one was coming back saying they were any good yet. I don't know anyone who's ever bought Maxxis but with the price of the big names tyres going up every year I reckon we'll all be on em soon.
As for the 15 tooth sprocket, its a bit smoother and a bit crisper excellerating. Most notably it was a lot better holding a steady throttle going around roondaboots or big bends. Deffinately worth doing but I won't be changing the rear. Hucho happio :thumbup