But on a DH you really are not sitting down. Yes the saddle helps with control but standing up, the position of your feet which is determined by the postion of the bb becomes relevant when your hands are on the bars and your body is in attack position. I am not saying TT is irelavant, I am only say it is hard to compare between bikes for sizing when using the TT. My new Delerium is an amazing fit for me. I think at 6'1" I am sitting on the fence for getting the right size for my style. I like to play on my bike more than anything. The Delerium has a slack seat angle which increase the cockpit size when extended. I was worried it would be too big for a play bike but with the saddle down it really drops a size and with saddle up is perfect for pedaling. Best fitting bike I have owned to date.