When I was a kid I could ride any type of bike from a Stingray to a 10 speed for miles no handed, around corners, etc. but now when I try the bike goes into a serious wobble and I have to grab the bars. I don't believe it's a matter of my sense of balance though, I can come to a complete stop at a stop sign and start again without unclipping. Could it be that I'm a lot heavier now and there's too much of a weight bias toward the rear wheel? There have been a couple times it would have been useful to be able to go hands free for even just a few seconds to make an adjustment. I have only tried this on my 2 MTB's but they are set up differently. Any suggestions would be most welcome. TIA.