Stuff like this makes me laugh. I wish people would read up on what they were trying to do before posting. Like Street rider said the TT is based on your height and then preference. I knew a 6 ft plus dude who rode a 18.5" frame and some shorter people who 21". The length isn't going to make you go higher or do sweeter tricks. I'm 5'7'' and run a 20.5" and have complete control of what I want my bike to do. Honestly, it is more about you than your bike. When I first got into the bmx scene I thought it was all about the bike. If you have a study bike they you can do whatever. Lighter bikes can make things easier if you aren't "strong." Personally I think you need to practice what you are doing. Once you master that you can do anything on any type of bmx