Last night I rode home on completely dry streets, cursing the heavy studded tires on my bike. Before I went to bed, I checked the streets and the forecast. Dry, clear skies, relatively calm. At midnight, I put on my slicks. At 12:45, I look outside again - no change. At 6:45, I awoke to 1.5" of fresh snow on the ground. I quickly changed the tires back to studs. I didn't even get halfway up the stairs before hearing the tell-tale FWUP of the bead popping off the front rim at a whopping 50 psi. ****. It holds at 45 psi, so I run upstairs, shower, throw on the gear and head out the door. 1 km into the ride - FWUP! ****!!! It's the rear tire this time, and I don't want to mess with taking the wheel off in the snow. I let out all the air, then work the tire back onto the rim and throw 30 psi in. I made it into work without bailing, but I foresee the walk of shame on the way home tonight. Time for a second wheelset so I don't have to deal with this crap again...