Load index

The load index , also load index (LI) Load index or load number called, is a coding and indicated for vehicle tires , the maximum permissible load. The index is noted on the side of the tire. A table can be used to determine the maximum permissible load per tire in kilograms.

Tabular listing

Load indices for motorcycle tires , car tires as well as truck and agricultural tires

Load index Load per tire [kg] 019th 00077.5 020th 00080 021st 00082.5 022nd 00085 023 00087.5 024 00090 025th 00092.5 026th 00095 027 00097.5 028 00100 029 00103 030th 00106 031 00109 032 00112 033 00115 034 00118 035 00121 036 00125 037 00128 038 00132 039 00136 040 00140 041 00145 042 00150 043 00155 044 00160 045 00165 046 00170 047 00175 048 00180 049 00185 050 00190 051 00195 052 00200 053 00206 054 00212 055 00218 056 00224 057 00230 058 00236 059 00243 060 00250 061 00257 062 00265 063 00272 064 00280 065 00290 066 00300 067 00307 068 00315 069 00325 070 00335 071 00345 072 00355 073 00365 074 00375 075 00387 076 00400 077 00412 078 00425 079 00437 080 00450

Load index Load per tire [kg] 081 00462 082 00475 083 00487 084 00500 085 00515 086 00530 087 00545 088 00560 089 00580 090 00600 091 00615 092 00630 093 00650 094 00670 095 00690 096 00710 097 00730 098 00750 099 00775 100 00800 101 00830 102 00850 103 00875 104 00900 105 00925 106 00950 107 00975 108 01000 109 01030 110 01060 111 01090 112 01120 113 01150 114 01180 115 01215 116 01250 117 01285 118 01320 119 01360 120 01400 121 01450 122 01500 123 01550 124 01600 125 01650 126 01700 127 01750 128 01800 129 01850 130 01900 131 01950 132 02000 133 02060 134 02120 135 02180 136 02240 137 02300 138 02360 139 02430 140 02500 141 02575 142 02650

Load index Load per tire [kg] 143 02725 144 02800 145 02900 146 03000 147 03075 148 03150 149 03250 150 03350 151 03450 152 03550 153 03650 154 03750 155 03875 156 04000 157 04125 158 04250 159 04375 160 04500 161 04625 162 04750 163 04875 164 05000 165 05150 166 05300 167 05450 168 05600 169 05850 170 06000 171 06150 172 06300 173 06500 174 06700 175 06900 176 07100 177 07300 178 07500 179 07750 180 08000 181 08250 182 08500 183 08750 184 09000 185 09250 186 09500 187 09750 188 10,000 189 10300 190 10600 191 10900 192 11200 193 11500 194 11800 195 12150 196 12500 197 12850 198 13200 199 13600 200 14000 201 14500 202 15000 203 15550 204 16000

These values ​​refer to a tire pressure of 2.5 bar. Instead of a tire with a certain index, a tire of the same type with a higher index can and may be used.

At speeds over 210 km / h (for tires with V- speed index ), 240 km / h (for tires with W-speed index or also with the ZR label) or 270 km / h (for tires with Y-speed index) the permissible The load depends on the speed. For example, a tire with a V speed index at its maximum speed of 240 km / h may only be loaded with 91% of the maximum load corresponding to its load index.

Two load indices indicate truck and van tires. The first number indicates the load capacity for single tires, the second for twin tires.

PR number

The designation PR stands for ply rating and is a code for the load capacity of different versions of a tire size with regard to their substructure. It used to correspond to the number of carcass layers, more precisely the number of layers of cotton cord in the substructure. The indication "8 PR" means: "The tire can be loaded like a tire with 8 layers of cotton cord in the substructure, regardless of how many layers of another type of cord are present in the substructure." A direct indication of the load capacity can be found in the PR -Number cannot be derived. This can be seen from the fact that different tire sizes with the same PR number do not have the same load capacity.

Today the PR number can only be found sporadically on C-tires (light truck tires, many of which are available in different load-carrying capacities) and on tires with a diagonal construction . "The tire load capacity is always to be seen in combination with the speeds driven [...]. The tire or vehicle dealer can be asked for details. ”Some sales organizations of tire manufacturers publish technical guides for certain types of tires, in which a tire model-specific table is printed for certain tires with a PR number, from which the respective load capacity of this particular tire model is printed with different Air pressures and speeds can be read, possibly supplemented by certain load-related restrictions. In the standards book of the ETRTO (European Tire and Rim Technical Organization) all tables for the load index and PR numbers are available.

The load index (LI) has prevailed for specifying the load-bearing capacity.

See also

• Description of the information on a tire
• Topic list road traffic

Individual evidence

1. ↑ The identification of the car tire. Guide to the designations in the vehicle registration document and on the tire wall. In: www. adac.de . ADAC eV, accessed on October 28, 2018 (point 2e).
2. ^ ^{A b c} Max Bohner, Wolfgang Keil, Siegfried Leyer, Wolfram Pichler, Wolfgang Saier, Harro Schmidt, Paul Siegmayer, Heinz Zwickel: Book of tables for motor vehicle technology. Tables, formulas, overviews, standards. Mathematics, basic knowledge, specialist knowledge of automotive technology, materials science, drawing, standard parts (= European reference book series for automotive technology .). 10th edition. Verlag Europa-Lehrmittel, Nourney, Vollmer GmbH & Co., Haan-Gruiten 1994, ISBN 3-8085-2070-1 , p. 228 (Head of the working group and editing: Rolf Gscheidle).
3. ↑ ^{a b} The identification of the car tire. Guide to the designations in the vehicle registration document and on the tire wall. In: www. adac.de . ADAC eV, accessed on October 21, 2018 (point 2, sub-item “C tires for light trucks and off-road vehicles”).
4. ↑ For example, the technical guide contains agricultural tires. 2008/2009. of CGS Reifen Deutschland GmbH (Hanover 2007. Online in: www.adk.bg. АДК - Адимекс и Кондев ООД (ADK - Adimex & Kondev LTD), accessed on October 28, 2018 (PDF; 3.11 MB)) - next the explanation of the tire designation PR on page 6 - for the individual tire sizes of a certain tire model, which is a bias-ply tire, such tables on pages 58-61. Supplemented by a footnote with the restrictive condition that the values ​​for 30 km / h apply for field use with continuous, high torques.

Web links

• GTUE-Informative - Type-approved tires are also permitted with a lower speed and load index under certain conditions (PDF; 624 KB)