I happened across a picture of one of you bike in an old post from 2007 it looks like a picture of a bonanza with some oversized tires. I want to put bigger tires on mine but wonder about clearance, in your post you mention 530x450x6,13x500x6,or this tire 145x70x6 whic tire is the smaller of the bunch and do you know if they will fit between my forks without having to cut or grind? thanx jim