for UK guys, I just fitted an Avon venom 170/80 on the rear and an Avon roadrider 110/80 on the front as i couldnt get a front venom here? the front is what is recommended on the Avon website. I have done about 80 miles so far and feel a big diffrence but my metzelers were shot after 15000 miles and the bike had become a bit skippy in the wet and roundabouts were a bit of a buttock clencher.