A couple of times during the last couple of weeks I've ridden to work on my trusty '02 Wide Glide when the temp has been close to freezing (2 degrees Celcius - in Canada), and applied the rear brake for a slightly quicker than normal stop only to have the back wheel scoot out a couple of times. Happened again this morning. Nothing panicky, but not confidence inspiring. It went a couple of degrees below freezing last night, and it's about 2C this morning. There's a reasonable amount of tread left on the tire (HD tires). Neither of these stops were anything close to emergency braking, but it took quite a while longer to stop than I was comfortable with. So, here's the question - finally! Let's say I have half the tread still on the tire - would a new tire improve the situation or is it just a fact of cold rubber on a cold road? By the way, I was applying front brake as well - it's just the rear that was breaking away.