Mazda 2015 5 Owner's Manual page 426

Customer Information and Reporting Safety Defects
Tire Information (U.S.A.)
70
70 is the aspect ratio. This two-digit number indicates the tire's ratio of height to width.
D
D is the tire construction symbol. D indicates diagonal ply construction .
16
16 is the wheel rim diameter in inches.
90
90 is the Load Index. This two-or three-digit number indicates how much weight each
tire can support.
M
M is the speed rating. The speed rating denotes the maximum speed for which the use of
the tire is rated.
Letter Rating
9-28
M
Speed Rating
81 mph