c24°C, clear but anvil clouds building. CK: 40miles

Met office have issued  warning of smog over the weekend. they say that the still air and bright sunshine cause gasses in fumes to react and produce ozone. It’s a problem for asthmatics and kids, this is quite interesting. It’s interesting for me on days like this where I have been out on the bike. Sometimes, when I get home I have a little cough, a strange one that feels achey in my lungs. Could this be a hint of the “tightness” that asthmatics complain of?

Riding on the 16t: as the ride wore on, it started to feel right. There were a few difficult hills but I could touch 30mph on the descents so it’s all about compromise. Overall, the average speed should be up on the 17t cog. I bet that winter rides will need that 17t again though, the difficulty is spinning out on fast descents. I never can keep the speed up in the cold weather anyway.