This code, when present, appears after the size marking. The code comprises three characters: two numbers and a letter, for example, 67H.The two-digit number is a code for the maximum load carrying capacity of the tire. The letter is a maximum speed rating indicating the maximum speed at which the tire may be used with maximum load when the maximum listed inflation pressure is used. Note: Michelin does not recommend or endorse exceeding the safe, legal speed limit.