I had noticed that recently my commute seemed to be a harder slog than I remembered it, but I just put it down to having a bad patch. However, I'd also been neglecting to check the pressure on my tyres much and I'd probably not put any new air in them for a good six weeks or so. I was a bit shocked when I put the pump on them over the weekend to see how much the pressure had reduced so I pumped them up nice and hard. Today I just flew to work and back. It was so easy; the bike just seemed to race underneath me. I think for some reason since I'd got my new puncture resistant tyres I'd somehow subconsiously figured that they wouldn't need inflating so much, but I did know that they needed a bit more air - I just hadn't realised how much. I also hadn't realised how much of a tangible difference keeping the tyres hard would make. Kind of makes me wonder how much difference moving from my 35x700c tyres down to 25x700c's would make.