I had my bike out today and I had a weird feeling when braking lightly / medium application. I tried just using the front brake and I got the same feeling. Decelerating, turning, acceleration, all felt normal. It felt a little loose in the wind too though...

Every looked okay, couldn't find any loose parts or anything out of the ordinary....

The best way to put it is that anytime I used the rear break it felt like it was locked up. I made sure on three different stops-long stops too, not pounding on, and it almost had me convinced (feeling-wise) that I was locking it up with almost no application. But I wasn't. It felt almost the same though.

Heavy braking did solve the problem... or seemed to though.

Any ideas as to what it might be?

Also, an afterthought, the tire pressures were normal, if not a few psi high.

My guess would be rear bearings are going out.

Rear end feels wobbly, but heavy braking tightens it up.

also how's your rear tire?  about worn out?

If that doesn't work it out, try a different girl friend.

Isn't that what richard geer said.