3 hour prescribed to a 2 hour z2 ride as I feel. When I left the house it was 41 degrees and may have warmed up to 45 at the finish with some sunshine. My power tap decided it was too cold and stopped providing power indication about 20 minutes into the ride. It returned about 30 minutes later. At the halfway point, my wife cuts the sidewall on the front tire. We called a cab and they sent a van to pick us up. While we were on the side of the road waiting, we had at least 5 offers from motorists to assist us as well as the usual offers from other cyclists.