Here's my idea, play around with the pressure on your current tyres more, drop the tyres a bit more by 5-7psi and ride it.
I have done that, ridden them at 65 front, 70 rear around Flanders and they were fine but northern France is a different gravy so would prefer a bit more of a buffer
@mrJL 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.
Here's my idea, play around with the pressure on your current tyres more, drop the tyres a bit more by 5-7psi and ride it.