If we compare a tire marked 295/80 R22.5 150/146 N with another marked 295/80 R22.5 150/146 M, what are the main differences between them?

Question

DentroTest · Accepted Answer

In the nomenclature of heavy vehicle tires, the letter that closes the marking, after the numbers, is the speed code: it indicates the maximum speed that the tire can withstand at the specified load. Here, "M" allows up to 130 km/h and "N" up to 140 km/h, so the two tires differ in speed code. They do not differ in whether or not they have an inner tube, because that is specified with the terms "Tubeless" or "Tube Type". Nor do they differ in load index, since both are marked 150/146 (150 for single fitting and 146 for dual fitting).

If we compare a tire marked 295/80 R22.5 150/146 N with another marked 295/80 R22.5 150/146 M, what are the main differences between them?

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