dude why the heavy tyres I want tyres that perform for me, I ride skatepark and trails the tread pattern is perfect for what I do, people seem to be so wrapped up these days in how light a bike is I personally dont give a shit I just get out there and ride. When I built the bike it was never planned to be light I picked all the gear I know is strong Ie profile cranks hubs etc I used to use these over 15 years ago when I bmxed and they still are by far the best gear on the market.