I just have to disagree that total weight is not an issue - for me and how I ride. I'm a 5'8 guy who weighs 135 pounds and can tell you that riding my 30+ lb Marlin 29er is more work and less fun than riding my 20-something lb SirrusX or old school Sugar. Up hills and even on straightaways. It's great when it gets going, and love the confidence of rolling over everything with the bigger tires - but I'd like to strike a better balance with performance and ability.