DBZS 27: 201X  
1 
 ISSUED FOR COMMENT S ONLY  
ooooooooooooooooooooooooooooooooooooooooooooo oooooooooooooooooooooooooooooo  
 
DRAFT  BELIZE STANDARD  
SPECIFICATION FOR PNEUMATIC TYRES  FOR  NON -PASSENGER VEHICLES  
 
 
 
 
 
This is a draft and should not be regarded or used as Belize Stand ard. 
 
Last date for comments: ( 6 October , 2017 ) 
 
 
 
 
 
 
 
 
 
Belize Bureau of Standards  
Power Lane, Ministry of Works Compound  
P.O. Box 430  
City of Belmopan , Cayo District  
Belize , Central  America  
DBZS 27: 201X  
2 
  
DRAFT  BELIZE STANDARD  
SPECIFICATION FOR PNEUMATIC TYRES FOR  NON-PASSENGER VEHICLES  
 
 
Committee Representation  
The preparation of this standard for the Standards Advisory Council established under the 
Standards Act 1992 was carried out under the supervision of the Bureau’s Technical Committee 
for Tyres , which at the time comprised the following members:  
TECHNICAL COMMITTEE  
CHAIR                                                                   REPRESENTING              
Mr. Ricardo Diaz      Santos Diaz and Sons  
 
MEMBERS                                              REPR ESENTING  
Mr. Vallan Hyde      Department of Transport  
Mr. Henry Reimer      Caribbean Tyres  
Mr. Kenrick Gordon      Department of Environment  
 
  
TECHNICAL SECRETARY  
Mr. Lloyd Orellano  
Belize Bureau of Standards  
 
 
 
 
 
 
 
 
 DBZS 27: 201X  
3 
 Table of Contents  
0 FOREWORD  ................................ ................................ ................................ ...........................  4 
1 SCOPE ................................ ................................ ................................ ................................ ..... 4 
2 NORMATIVE REFERENCES  ................................ ................................ ..............................  4 
3 TERMS AND DEFINITI ONS ................................ ................................ ...............................  5 
4 TYRE DESIGNATION  ................................ ................................ ................................ ...........  5 
4.1 Content  ................................ ................................ ................................ .............................  5 
4.2 Size and Construction ................................ ................................ ................................ ....... 5 
4.2.1  Marking  ................................ ................................ ................................ ........................  5 
4.2.2  Nominal  Section Width ................................ ................................ ...............................  5 
4.2.3  Nominal Aspect Ratio  ................................ ................................ ................................ .. 6 
4.2.4  Tyre Construction Code ................................ ................................ ................................  6 
4.2.5  Nominal Rim Diameter  ................................ ................................ ................................  6 
4.3 Service Conditions Character istics ................................ ................................ .................  7 
4.3.1  Marking  ................................ ................................ ................................ ........................  7 
4.3.2  Load Index ................................ ................................ ................................ ....................  7 
4.4 Other Service Characteristics  ................................ ................................ ...........................  8 
5 MARKING AND LA BELLING REQUIREMENTS  ................................ ........................  9 
6. SAMPLING, INSPECTION  AND SELECTION OF TYRES ................................ ............  12 
6.1 General  ................................ ................................ ................................ ...........................  12 
6.2 Sample size  ................................ ................................ ................................ ....................  12 
6.3 Test Certificates for New Tyres  ................................ ................................ ....................  12 
6.4 Inspection of Tyres  ................................ ................................ ................................ .........  13 
6.5 Compliance  ................................ ................................ ................................ ....................  14 
6.6 Non-conforming Tyres  ................................ ................................ ................................ ... 14 
8 STORAGE  ................................ ................................ ................................ .........................  14 
9 TYRE INSPECTION PROGRAMME  ................................ ................................ ..............  14 
 
 
 
 
 
 
 DBZS 27: 201X  
4 
 DRAFT  BELIZE STANDARD  
SPECIFICATION FOR PNEUMATIC TYRES FOR NON -PASSENGER VEHICLES  
 
 
0 FOREWORD  
 
0.1 The standard was prepared to provide adequate information to tyre dealers/ 
manufacturers and purchasers/consumers for the safe operational perfo rmance of 
pneumatic tyres used on non -passenger vehicles. Tyre dealers/manufacturers will 
be guided by the full range of tyre specifications outlined in the standard. The 
information provided to purchasers/consumers will permit proper selection and 
use of these tyres.  
0.2 In preparing this standard considerable  assistance  was derived from:  
a) SLNS 42: 2005 - Specification for Pneumatic Tyres f or Non - Passenger 
Vehicles  
1 SCOPE  
 
This standard specifies requirements  for pneumatic tyres for use in non -passenger  vehicles 
including  multipurpose vehicles, trucks, buses, trailers and motorcycles.  
2 NORMATIVE REFERENCES  
 
The following referenced documents are indispensable for the application of this 
document. For dated references, only the edition cited applies. For  undated references, 
the latest edition of the referenced document (including any amendments) applies.  
a) BZS 5: 201 X (Revision)  – Definition of Terms Used in the Pneumatic Tyre 
Industry;  
 
b) BZ CP 1: Part 1: 201 X (Revision) - Code of Practice for the Storage of  Tyres, 
Inner Tubes and Flaps ; 
 
c) ISO 2859 -1: Sampling procedures for inspection by attributes -- Part 1: Sampling 
schemes indexed by acceptance quality limit (AQL) for lot -by-lot inspection  
 
d) ISO 3951  - Sampling procedures for inspection by variables -- Part 1: 
Specification for single sampling plans indexed by acceptance quality limit 
(AQL) for lot -by-lot inspection for a single quality characteristic and a single 
AQL  DBZS 27: 201X  
5 
 3 TERMS AND DEFINITI ONS 
 
For the purpose of this standard, the definitions of Belize standa rd BZS  5: 201X  
Definitions  of Terms  Used  in the Pneumatic  Tyre  Industry  shall apply  along with the 
following:  
3.1 commercial vehicle tyre  means a tyre for use on vehicles which carry ten (10) or 
more persons and/or with a Maximum Gross Weight (MGW) in exce ss of 3000 kg 
(6500 lb), as well as light trucks.  
3.2 light truck  means a self -propelled vehicle which is designed primarily to transport 
property or special purpose equipment and has a Maximum Gross Weight (MGW) 
in excess of 3000 kg (6500 lb)  or less.  
4 TYRE DESIGNATION  
 
4.1 Content  
The designation of the tyre shall be shown on its sidewall and shall include the 
following markings to be shown close to each other:  
a) Size and construction ; and  
 
b) Service condition characteristics  
4.2 Size and Construction  
4.2.1 Marking  
The size and construction characteristics shall be indicated as follows:  
Nominal  
section  
width  Nominal  
aspect  
ration  Tyre  
construction  
code  Nominal  
rim diameter  
code  
 
or 
 
Nominal  
section  
width  Tyre  
construction  
code  Nominal  
rim 
diameter   
 
 
  
NOTE : the sequence from left to right shall be maintained . 
4.2.2 Nominal  Section Width 
a) The nominal section width shall  be expressed in millimetres. 
  
b) For tyres fitted to 5o taper rims and 15o taper rims, (code designated) the 
nominal tyre section widt h shall end in 5.  DBZS 27: 201X  
6 
 4.2.3 Nominal Aspect Ratio  
The nominal aspect ratio shall be expressed as a percentage and shall be a 
multiple of 5.  
4.2.4 Tyre  Construction Code  
   The tyres construction code shall be as follows:  
a) B or a dash sign ( -) for bias -belted con struction;  
b) D, or -, for diagonal /bias  construction;  
c) R for radial ply construction.  
NOTE:   The use of another  code  letter  (for example,  in the case of a 
new construction  type)  shall  first be remitted  to the Belize  
Bureau  of Standards  for acceptance  and inclusion  in this list. 
4.2.5 Nominal Rim Diameter  
The normal rim diameter for 5o tapered bead set rims and for 18o tapered 
bead set (drop center) rims shall be expressed by a code (see Table 1 for 
code correlations).  
 
NOTE:  15o tapered rims  are to be used on ly for tyres with load index 
122 and longer.  
 
Table 1: Nominal rim diameter code  
 
Code  Nominal rim diameter, 
Dr (mm)  
5o tapered rims  15o tapered 
(drop -centre) 
rims   
10 -- 254 
12 -- 305 
12 -- 330 
14 -- 356 
-- 14.5 368 
15 -- 381 
16 -- 406 
17 -- 432 
-- 17.5 445 
18 -- 457 
-- 19.5 495 
20 -- 508 
-- 20.5 521 
22 -- 559 
-- 22.5 572 
24 -- 610 
-- 24.5 622 
 DBZS 27: 201X  
7 
 4.3 Service Conditions Character istics 
 
  4.3.1 Marking  
   The characteristics shall be indicated as follows:  
   Load index single/Load index dua l speed symbol  
  4.3.2 Load Index  
a) The load index is a numerical code associated with the maximum load 
a tyre can carry at the speed indicated by its symbol under the service 
conditions specified by the manufacturer (see table 2).  
Table 2: Correlation betwe en load index (u) and tyre load carrying capacity (TLCC)  
Load 
index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) 
0 46 40 140 80 450 120 1400  160 4500  200 14000  240 45000  
1 46.2 41 154 81 462 121 1450  161 4625  201 14500  241 46250  
2 47.5 42 150 82 475 122 1500  162 4750  202 15000  242 47750  
3 48.7 43 155 83 487 123 1550  163 4875  203 15550  243 48750  
4 50 44 160 84 500 124 1600  164 5000  204 16000  244 50000  
5 51.5 45 165 85 515 125 1650  165 5250  205 16500  245 51500  
6 53 46 170 86 530 126 1700  166 5300  206 17000  246 53000  
7 54.5 47 175 87 545 127 1750  167 5450  207 17500  247 54500  
8 56 48 180 88 560 128 1800  168 5600  208 18000  248 56000  
9 58 49 185 89 580 129 1850  169 5800  209 18500  249 58000  
              
10 60 50 190 90 600 130 1900  170 6000  210 19000  250 60000  
11 61.5 51 195 91 615 131 1950  171 6150  211 19500  251 61500  
12 63 52 200 92 630 132 2000  172 6300  212 20000  252 63000  
13 65 53 206 93 650 133 2060  173 6500  213 20600  253 65000  
14 67 54 212 94 670 134 2120  174 6700  214 21200  254 67000  
15 69 55 218 95 690 135 2180  175 6900  215 21800  255 69000  
16 71 56 225 96 710 136 2240  176 7100  216 22400  256 71000  
17 73 57 230 97 730 137 2300 177 7300  217 23000  257 73000  
18 75 58 236 98 750 138 2360  178 7500  218 23600  258 75000  
19 77.5 59 243 99 775 139 2430  179 7750  219 24600  259 77500  
              
20 80 60 250 100 800 140 2500  180 8000  220 25000  260 80000  
21 82.5 61 257 101 825 141 2575 181 8250  221 25750  261 83500  
22 85 62 265 102 850 142 2650  182 8500  222 26500  262 85000  
23 87.5 63 272 103 875 143 2725  183 8750  223 27250  263 87000  
24 90 64 280 104 900 144 2800  184 9000  224 28000  264 90000  
25 92.5 65 290 105 925 145 2900  185 9250  225 29000  265 92500  
26 95 66 300 106 950 146 3000  186 9500  226 30000  266 95000  
27 97.5 67 307 107 975 147 3075  187 9750  227 30750  267 97500  
28 100 68 315 108 1000  148 3150  188 10000  228 31500  268 100000  
29 103 69 325 109 1030  149 3250  189 10300  229 32500 269 103000  
              
30 106 70 335 110 1060  150 3350  190 10600  230 33500  270 106000  
31 109 71 345 111 1090  151 3450  191 10900  231 34500  271 109000  
32 112 72 355 112 1120  152 3550  192 11200  232 35500  272 112000  
33 115 73 365 113 1150  153 3650  193 11500  233 36500  273 115000  
34 118 74 376 114 1180  154 3750  194 11800  234 37500  274 118000  
35 121 75 387 115 1215  155 3875  195 12150  235 38500  275 121000  
36 125 76 400 116 1250  156 4000  196 12500  236 40000  276 125000  DBZS 27: 201X  
8 
 Load 
index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) Load 
Index 
(u) TLCC 
(kg) 
37 128 77 412 117 1285  157 4125  197 12850  237 41250  277 128500  
38 132 78 425 118 1320  158 4250  198 13200  238 42500  278 132000  
39 136 79 437 119 1360  159 4375  199 13600  239 43750  279 136000  
 
b) Speed Symbol  
The speed symbol indicates the speed at which the tyre can carry the 
load correspond ing to its load index under the service conditions 
specified by the tyre manufacturer (see table 3).  
Table 3: Correlation between speed symbol and speed category  
Speed Symbol  Speed Category (km/h)  
B 50 
C 60 
E 65 
F 70 
G 80 
J 90 
K 100 
L 110 
M 130 
N 140 
P 150 
Q 160 
R 170 
S 180 
T 190 
U 200 
H 210 
V 240 
Z greater than 240  
 
4.4 Other Service Characteristics  
  
4.4.1 In the case of tubeless tyres, the marking “Tubeless ” shall  be shown on 
the tyre.  
4.4.2. In the case of a preferred direction of r otation of the tyre, an arrow shall 
be used to indicate the direction.  
4.4.3 In the case of special tread tyres, the symbol “ET” shall be shown on the 
tyre.  
 DBZS 27: 201X  
9 
 Example  
 A tyre having:  
a) A size and construction of:  
i. nominal section width 275 mm;  
ii. nominal aspect ratio 70%;  
iii. radial construction;  
iv. nominal rim diameter code 22.5;  
 
b) Service condition characteristics of :  
i. Single load 2500 kg;  
ii. Dual load 2300 kg;  
iii. Reference speed 130 km/h.  
 
c) Other serviceable characteristics:  
i. Tubeless  
ii. Special tread  
 
d) Shall be marked:  
 
 
 
 
 
5 MARKING AND LABELLING REQUIREMENTS  
5.1 Each  tyre shall  have permanently moulded on each  sidewall, except as specified 
in (j), the following  information  in letter sizes and at locations not less than 4.0 
mm high and of a depth not less than 0.25mm if below  the background surface, 
or not less than 0.40 mm if above the background surface : 
a) the designation  of dimensional and const ructional characteristics;  
 
b) the designati on of load and speed characte ristics;  
 
c) the designation of other servi ce characteristics ; 
 
d) the maximum load rating and corresponding inflation pressure of the tyre, 
shown as follows:  
i. (Mark on tyres rated for single and dual load):  
‘Max load single ____   kg ____ at ____ kPa cold;  
‘Max load dual ____   kg ____ at ____ kPa cold;  
 
ii. (Mark on tyres rate d only for single load):  
Max load kg _____  at   _____ kPa cold;  
 275/70 R 22.5  140/137/M  Tubeless ET  DBZS 27: 201X  
10 
 e) the speed restriction of the tyre, if 80 km/h or less, shown as follows:  
 Max speed   ____ km/h;  
f) actual number of plies and the composition of the ply material in the sidewall 
and if difficu lt, in the tread area;  
 
g) the words “tubeless” or “tube  type” as applica ble; 
 
h) the word “regroovable”, if the tyre is designed for regrooving;  
 
i) the word “radial” if the tyre is a radial ply tyre; 
 
j) the letter designating the tyre load range;  
 
k) a date code, on a t least one sidewall, consisting of three digits, the first two 
naming the week of manufacture and the third digit the year of manufacture;  
 
l) identification of the manufacturer either by name or brand name;  
 
m) country of manufacture;  
 
n) Uniform Tyre Quality Gra de Labelling (Treadwear, Traction and 
Temperature)  (see 5.6) ; 
 
o) DOT marking;  
NOTE:  DOT signifies that the tyre complies with the United States Department 
of Transportation tyre safety standards and is approved for highway use.  
DOT M5H3 459X 0605  
The first t wo characters  following DOT designate the tyre’s manufacturer 
and plant code. The third and fourth characters denote the tyre size. The 
fifth, sixth, seventh and eighth (optional) characters identify the brand and 
other significant characteristics of the t yre. The ninth and tenth characters 
denote the week the tyre was produced. The last two numbers signify the 
year in which the tyre was manufactured.  
5.2 The markings shall be placed between the maximum section width (exclusive of 
sidewall decorations or cu rb ribs) and the bead on at least one sidewall, unless the 
maximum section width of the tyre is located in an area which is not more than 
one-fourth of the distance from the bead to the shoulder of the tyre. If the 
maximum section width falls within that a rea, the markings shall appear between 
the bead and a point one -half the distance from the bead to the shoulder of the 
tyre, on at least one sidewall. However, in no case shall the information be DBZS 27: 201X  
11 
 positioned on the tyre so that it is obstructed by the flang e of any rim designated 
for use with that tyre in this standard.  
5.3 The markings shall be in letters less than 2 mm high and raised above or sunk 
below the tyre surface not less than 0.25 mm, except that the marking depth shall 
not be less than 0.25 mm in  the case of motorcycle tyres.  
5.4 Markings may appear on only one sidewall and the entire sidewall area may be 
used in the case of motorcycle tyres and recreational, boat, baggage and special 
trailer tyres.  
5.5 The maximum inflation pressure of a tyre sh all be permanently moulded into or 
on both sidewalls in numerals not less than 12.0 mm high.  
NOTE:  Where applicable  internationally accepted symbols, corresponding to or 
having the same meaning as any of the above requirements, may be used.  
5.6 Uniform Qua lity Grade Labelling  
5.6.1  The Uniform Tyre Quality Grading System (UTQGS) is a tyre information 
system that provides buyers with information on three categories – 
treadwear, traction and temperature. Each tyre manufacturer shall perform 
its own tests in t hese areas following prescribed test procedures. Each 
manufacturer shall then assign grades that are branded on the tyre. This is 
known as Uniform Quality Grade Labelling (UTQGL).  
 
5.6.2 Treadwear  
 Treadwear grades typically range from 60 to over 600 in tw enty-point 
increments. The actual life of any tyre is determined by the road surface 
quality, driving habits, inflation, wheel alignment and rotation it 
experiences.  
 
5.6.3 Traction  
 Traction grades indicate the measurement of a tyre’s ability to stop a ca r in 
straight -ahead motion on a wet test surface pavement. They do not measure 
straight -ahead acceleration. Traction grades range from AA, A, B and C 
with AA being the highest attained grade.  
 
 
5.6.4 Temperature  
 Temperature grades also range from A to C w ith A being the highest. 
Temperature grades represent a properly maintained tyre’s ability to 
dissipate heat under controlled indoor test wheel conditions. A tyre graded 
“C” if it meets the minimum performance required by the Department of 
Transport, and g rades of “B” and “A” represent higher levels of 
performance than the minimum required by DOT.  DBZS 27: 201X  
12 
  
 Example: Treadwear 300 Traction AA Temperature A  
6. SAMP LING , INSPECTION  AND SELECTION OF TYRES  
 
6.1 General  
6.1.2  All tyre inspections shall be conducted by a  trained and/or certified tyre 
inspector authorized by the Belize Bureau of Standards.  
6.1.3  Each tyre sample, taken in accordance with section 6.2 and inspected in 
accordance with section 6.4, shall be cleaned and inspected outside then 
inside in order t o detect all evident damage.  
6.1.4  Each inspected tyre shall be certified to indicate whether it is acceptable or 
not acceptable for use on non-passenger vehicles . 
6.2 Sample size  
6.2.1  For used tyres, one hundred percent (100%) sampling and inspection sh all 
be conducted in accordance with section 6.4.  
6.2.2  For new tyres, the size of the sample for inspection shall be representative 
of the lot as determined by the Belize Bureau of Standards.  
6.2.3  For the purpose of testing to determine conformity with th is standard, the 
size of the sample for inspection and/or testing  shall be representative of 
the lot under consideration and shall be selected in accordance with ISO 
2859 -1or ISO 3951  or any other sampling method as determined by the 
Belize Bureau of Stand ards. 
6.3 Test Certificates for New Tyres  
6.3.1  Prior to testing, a tyre shall exhibit no visual evidence of tread, sidewall, 
ply, cord, inner liner, or bead separation, chunking, broken cords, cracking 
or open slices.  
6.3.2  Test certificates for strength test, bead unseating test, high speed 
performance  and endurance test shall be carried out in accordance with a 
tyre testing laboratory or tyre certification body recognized  by the Belize 
Bureau of Standards.  
6.3.2 The importer shall supply a certificate of compl iance showing the results of 
tests conducted to determine compliance of the new tyres when requested 
by the Belize Bureau of Standards.  
 
6.3.3 Where the manufacture r, supplier or importer  do not have  the facilities 
for testing, the importer  shall be responsible  for arranging  that tests be DBZS 27: 201X  
13 
 done  by a tyre testing laboratory or tyre certification body  recognized by 
the Belize Bureau of Standards.  
6.4 Inspection of Tyres  
6.4.1  Tread wear indicators  
a) Except as specified, each tyre shall have at least six treadwear indi cators 
spaced equally around the circumference of the tyre that enable a person 
inspecting the tyre to determine visually whether the tyre has worn to a 
tread depth of 0.4 mm.  
 
b) Tyres either 305 mm or a smaller rim diameter shall have at least three 
such in dicators.  
 
c) Motorcycle tyres shall have at least three such indicators which permit 
visual determination that the tyre has been worn to a tread depth of 0.8 
mm. 
6.4.2  Visual Inspection Criteria  
A tyre containing any of the following weaknesses or damage sha ll not be 
certified  for use on non-passenger vehicles : 
a) Chunking, cracking, inner liner separation;  
 
b) Exposed cords due to tread wear or sidewall scuffing;  
 
c) Radial or groove cracks extending to the cords;  
 
d) Tread separation;  
 
e) Weather cracking extending to cor ds; 
 
f) Broken, damaged, kinked or exposed bead wires;  
 
g) Any visual evidence of belt damage;  
 
h) Splice p ly separation;  
 
i) Porous liners or defective or opened splices in liners extending to cords;  
 
j) Loose cords on the liner ply;  
 
k) Damage to inner or bead sealing are as on tyres identified as tubeless;  
 
l) Evidence of having been run under -inflated or overloaded;  DBZS 27: 201X  
14 
  
m) Casing break -up (flex break);  
 
n) Generally weakened condition due to age, moisture, or exposure to oil 
or other chemical substances causing disintegration;  
 
o) Injur ies to the plies in the bead area;  
 
p) Sidewall separation;  
 
q) Irregular /uneven tread wear;  
 
r) Blemished;  
 
NOTE:  For new tyres classified as blems are deemed acceptable for 
non-passenger vehicle use subject to quality control criteria 
as defined by the Belize Bur eau of Standards.  
 
s) Tyres showing evidence that studs were used or  
 
t) Nail, hole or other damage greater than 6 mm in diameter and/or number 
more than 4 per tyre.  
 
6.5 Compliance  
Where the samples taken in accordance with 6. 2 and satisfy all other requirement s 
of this standard, the lot shall be deemed to comply with this Belize Standard.  
6.6 Non-conforming Tyres  
6.6.1  Tyres intended for use on non-passenger vehicles which do not conform to 
all the requirements of this standard, shall not be sold, offered for s ale, or 
be imported into Belize.  
6.6.2  All non-conforming tyres shall be isolated and disposed of by a method, 
including re -export at the importer’s expense, approved  by the Belize 
Bureau of Standards.  
8 STORAGE  
Tyres shall be stored in accordance with BZ CP 1: Part 1: 201 X - Code of Practice for the 
Storage of Tyres, Inner Tubes and Flaps.  
9 TYRE INSPECTION PROGRAMME  
All tyres shall be inspected by and registered with the Belize Bureau of Standards . 
- End of Document  -