I was worried about the sidewalls on the 4000s
Same. Which is why I'm not using them.
The 4Seasons aren't much better. 0.2mm thinner tread than 4000S and 0.15mm thicker sidewall.
@PBoynton started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I was worried about the sidewalls on the 4000s