Not carried out with a control tyre... or with a particularly accurate pressure gauge... or any scientific control at all really...
All tyres in a state best described as "well used"
Gp4season 28mm
On Hunt 20mm internal:
31.7mm at 70psi,
31.8mm at 80psi
and 32.2mm at 90psi
On Mavic 17mm internal:
29.2mm wide at 80psi
and 29.8 at 90psi
Gp4season 25mm
On shimano rs81 15mm internal width
26.7 at 60psi
27mm at 70psi
27mm at 80psi
27.1mm at 90psi
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