Understanding tyre markings
Reading the sidewalls of a tyre
Learn to decipher the markings found on the sidewalls of your tyres.
VF = Very High Flexion: Prefix designating a standardised tyre category
650: Nominal section width in mm
60: Aspect ratio (sidewall height/nominal section of the tyre) as a %
R: Structure: "R" for radial "-" for bias
38: Nominal diameter of the rim in inches
155: Standardised load index
D: Standardised speed rating
Radial: Construction type
Tubeless: Tyre without inner tube
Michelin® X®: Trademark
Edito tyre marking Help and Advice
Le marquage d'un pneu agricole
Picto Tyre Dimensions Help and Advice
Tyre and rim dimensions
S: Section width of the tyre
R’: Radius under static load
R: Radius without load
D: External diameter, equal to 2 x R
H: Section height
Ø: Diameter of the rim
F: Internal width
The 42" series and its 38" equivalent
picto tyre markings 4 help and advice
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• How do you find the right references for rims, tubes and valves?
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• Road vehicle regulations