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267
6-1. MOBILITY
Supra Owner's Manual
6
MOBILITY
R: radial tire code
18: rim diameter in inches
96: load rating, not for ZR tires
Y: speed rating, before the R on
ZR tires
Maximum tire load is the maxi-
mum permissible weight for
which the tire is approved.
Locate the maximum tire load
on the tire sidewall and the
Gross Axle Weight Rating –
GAWR – on the certification
label on the driver door B-pillar.
Divide the tire load by 1.1. It
must be greater than one-half of
the vehicle’s Gross Axle Weight
Rating – GAWR. Note, front vs.
rear GAWR and tire loads,
respectively.
Q = up to 100 mph/160 km/h
R = up to 106 mph/170 km/h
S = up to 112 mph/180 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
DOT code: DOT xxxx xxx 3818
xxxx: manufacturer code for the
tire brand
xxx: tire size and tire design
3818: tire age
Tires with DOT codes meet the
guidelines of the U.S. Depart-
ment of Transportation.
Regardless of the tire tread,
replace tires at least every 6
years.
You can find the manufacture
date of the tire on the tire's
sidewall.
Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width.
E.g.: Treadwear 200; Traction
AA; Temperature A
Treadwear
Maximum tire load
Speed letter
Tire Identification Number
Tire age
Recommendation
Manufacture date
Designation
Manufacture
date
DOT … 3818 38th week, 2018
Uniform Tire Quality Grad-
ing
DOT Quality Grades
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