The 7 mile ride home would normally take 35 minutes, took 55. Cold (5F), windy, low pressure on the studs combined for a very tough trip. I was going to stop along the way for a 2 minute break but decided to push on. When I stopped at home, I got dizzy- like a low blood pressure rush. Fine after a minute. That never happened before. The commute in to work was colder (0F) but almost no wind.