I felt unusually weak and winded when cycling to work this week. Took me several days to realize that maybe pumping the tires would be a good idea. It made a big difference – about a full gear’s worth.

And they weren’t even that soft – not visibly so, or so that I could feel it when running over small bumps in the road. Sometimes I see people on bikes where the tires are visibly squishy, flattening where they meet the pavement. It must be really tiring.