Gravel / Gravé / Gnarmac / Groad / ATB

– You should point out that on the smooth surface, the testing being
done at 6 bar actually helped the Bon Jon roll faster than it would at
lower (more typical/appropriate) pressures. For example, I tested the
Bon Jon at 65 psi (~4.5bar) and it rolled signficantly slower than a
Conti GP4K at 7bar (.0058 vs .0035 Crr). In other words, “you can’t
have your cake and eat it too” on the pressure 😉

https://janheine.wordpress.com/2018/01/31/one-of-the-5-fastest-tire-in-the-world/#comments