Found this by Googling...

Load index 152 (3550kg / 7830lbs) One or two numbers which indicate the load the tire can carry in single or in single and dual operation at the speed corresponding to the associated speed category.

Dual charge rate 148 (3150kg / 6940lbs) [

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Speed code M (130km / h / 81mph) The speed symbol is made up of a single letter or an A with one number. It indicates the maximum speed at which the tire can carry a load corresponding to its Load Index

Load range H (16 ply) Load range means a letter (C, D, E, etc.) used to identify a given LT size with its load classification and inflation limits. The load-carrying capacity of passenger tires is rated as either Standard Load, Light Load or Extra Load.

I do not understand what a "Dual charge rate" is, and the article did not explain what it means.