I'm thinking really hard about putting a set of 22.5's on my '09 450. Can't go any bigger on the tires with the 19.5's since the factory wheels are only 6" wide. I want to go to a taller tire and maybe level the front. I've seen some really good looking 450's running 22.5's but no Harley 450's yet. I've just about gone through the stock Continental 19.5's - 42,000 miles. These things should have lasted at least 75K! Not sure what caused that - maybe it was all the white smoke!