Lexus IS F 2012 Owner's Manual page 527

Radial tires or bias-ply tires
A radial tire has "RADIAL" on the sidewall. A tire not marked "RADIAL" is
a bias-ply tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly filled in the tire. A
tube type tire has a tube inside the tire and the tube maintains the air pres-
sure.
Load limit at maximum cold tire inflation pressure
Maximum cold tire inflation pressure
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see "Uniform Tire Quality Grading" that follows.
Summer tire or all season tire
An all season tire has "M+S" on the sidewall. A tire not marked "M+S" is a
summer tire.
"TEMPORARY USE ONLY"
A compact spare tire is identified by the phrase "TEMPORARY USE
ONLY" molded into its sidewall. This tire is designed for temporary
emergency use only.
6-1. Specifications
(P. 416)
(P. 521)
(P. 416)
(P. 492)
527
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