This system originated in Europe & is also referred to as the European
Metric System. Most European tire manufacturers build tires that conform to
this system. The Metric System is very similar to the P-Metric System, except
in terms of load carrying capacity. Load carrying capacities of Metric &
P-Metric tires are sometimes not the same, even for two tires of the same size
designation.
|
Load Limits at Inflation
|
|
Size
|
26 psi |
32 psi |
35 psi |
36 psi |
44 psi |
|
P195/70R14 |
1135lbs
(1826kg) |
1257lbs
(2021kg) |
1312lbs
(2111kg) |
|
1312lbs
(2111kg) |
|
195/70R14 |
1185lbs
(1907kg) |
1280lbs
(2060kg) |
1325lbs
(2032kg) |
1340lbs
(2156kg) |
|
|
P205/60R15 |
1124lbs
(1808kg) |
1246lbs
(2005kg) |
1301lbs
(2093kg) |
|
1301lbs
(2093kg) |
|
205/60R15 |
1140lbs
(1834) |
1280lbs
(2060kg) |
1345lbs
(2165kg) |
1365lbs
(2196kg) |
|
As the previous examples illustrate, another load related difference between
P-Metric & Metric sizes is the maximum inflation pressure. P-Metric standard
load tires have a maximum inflation of 35psi (pounds per square inch) while
Metric are 36psi. Some speed rated tires have a maximum inflation of 44psi, this
capability has been added to enhance handling & high speed capability in some
vehicles. Size dimensions of P-Metric & Metric tires are basically the same.
It is important to note, however, that actual size dimensions can vary slightly
from one manufacturer to another.