Tire sizing chart – Ram Trucks 2015 ProMaster Commercial - Owner Manual User Manual
Page 238
• Temporary spare tires are designed for temporary
emergency use only. Temporary high pressure com-
pact spare tires have the letter “T” or “S” molded into
the sidewall preceding the size designation. Example:
T145/80D18 103M.
• High flotation tire sizing is based on U.S. design
standards and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.
Tire Sizing Chart
EXAMPLE:
Example Size Designation: P215/65R15XL 95H, 215/65R15 96H, LT235/85R16C, T145/80D18 103M, 31x10.5 R15 LT
P
= Passenger car tire size based on U.S. design standards, or
؆
....blank....؆
= Passenger car tire based on European design standards, or
LT
= Light truck tire based on U.S. design standards, or
T or S
= Temporary spare tire or
31
= Overall diameter in inches (in)
215, 235, 145
= Section width in millimeters (mm)
65, 85, 80
= Aspect ratio in percent (%)
– Ratio of section height to section width of tire, or
10.5
= Section width in inches (in)
236 STARTING AND OPERATING