Originally Posted by
biker128pedal
What is the inside width of your rim used for the measurements and pressure? Rim width is more important. I have GP5000 tube tires. They measure wider on rims 19mm wide inside or wider for 25mm and up tire size. Then to make it more confusing Continental made some changes to narrow the installed tire a few years ago. Last with age they get wider.
Edit. Found some older data on 19mm inside Bontrager Aeolus 5 rim brake.
Conti 5000 25 mm 85 & 67 psi 27.4 mm 19 mm
Conti 5000 28 mm 87 psi 29.0 mm 19 mm
I am too lazy to measure that now, but I didnt though rim width could affect tire width.
I still think gp 5000 are narrower when I look them in my hands side to side regardless of the rim.