I've been biking with an old full suspension GT-LTS for years. It was great when I was down south with long down hill portions. But up here there's more pedaling up hill. So a couple years ago I picked up a Cannondale Flash 3. It's a light weight hard tail which made a huge difference. That GT full suspension sucked up so much energy going up hill but I'm sure they're better now. I stuck with the 26 because I didn't care for the 29ers but now the 27.5 is becoming popular. I don't know, I like the 26. I changed the pedals to Spank Spike with Teva link shoes and Ergon grips.