ISO 5775 es una norma internacional para marcar las cubiertas y las llantasde bicicleta . El sistema se desarrolló originalmente en la Organización Técnica Europea de Neumáticos y Llantas (ETRTO).

Older markings of wired-edge tires can be converted to ISO 5775 designations with the help of the following table:

En la siguiente tabla se detallan las equivalencias entre las denominaciones antiguas y las de la norma:

Denominación |   Marcado antiguo (bien en pulgadas o bien dandoactual    |     el diámetro exterior en mm)-------------|-----------------------------------------------------28-590    |   26 × 1 3/8 × 1 1/8-------------|-----------------------------------------------------28-622    |   28 × 1 5/8 × 1 1/8             700 × 28C |   28 × 1 5/8 × 1 1/4 × 1 1/8     700 C Carrera-------------|-----------------------------------------------------28-630    |   27 × 1 1/4 fifty-------------|-----------------------------------------------------28-635    |                                  700 B-------------|-----------------------------------------------------28-642    |   28 × 1 3/8 × 1 1/8             700 × 28 A-------------|-----------------------------------------------------32-239    |   12 × 1 3/8 × 1 1/4             300 × 32-------------|-----------------------------------------------------32-248    |   12 × 1 1/4                     300 × 32 A-------------|-----------------------------------------------------32-288    |   14 × 1 3/8 × 1 1/4             350 × 32-------------|-----------------------------------------------------32-298    |   14 × 1 1/4                     350 × 32 A-------------|-----------------------------------------------------32-340    |   16 × 1 3/8 × 1 1/4             400 A|                                  400 × 32-------------|-----------------------------------------------------32-349    |   16 × 1 1/4 NL                  400 × 32 A-------------|-----------------------------------------------------32-357    |   17 × 1 1/4-------------|-----------------------------------------------------32-369    |   16 × 1 1/4-------------|-----------------------------------------------------32-390    |   18 × 1 3/8 × 1 1/4             450 A|                                  450 × 32-------------|-----------------------------------------------------32-400    |   18 × 1 1/4                     450 × 32A-------------|-----------------------------------------------------32-438    |   500 × 32 ANL-------------|-----------------------------------------------------32-440    |   20 × 1 3/8 × 1 1/4             500 A|                                  500 × 32-------------|-----------------------------------------------------32-451    |   20 × 1 1/4                     500 × 32 A-------------|-----------------------------------------------------32-489    |   550 × 32 ANL-------------|-----------------------------------------------------32-490    |   22 × 1 3/8 × 1 1/4             550 A|                                  550 × 32-------------|-----------------------------------------------------32-501    |   22 × 1 1/4                     550 × 32 A-------------|-----------------------------------------------------32-508    |   22 × 1 1/4 × 1-------------|-----------------------------------------------------32-540    |   24-1 3/8 × 1 1/4-------------|-----------------------------------------------------32-541    |   24 × 1 3/8 × 1 1/4 NL          600 A|                                  600 × 32 A-------------|-----------------------------------------------------32-547    |   24 × 1 1/4-------------|-----------------------------------------------------32-590    |   26 × 1 3/8 1 1/4               650 × 32A-------------|-----------------------------------------------------32-597    |   26 × 1 1/4-------------|-----------------------------------------------------32-622    |   28 × 1 5/8 × 1 1/4             700 × 32C|   28 × 1 1/4 × 1 3/4             700 × C Course-------------|-----------------------------------------------------32-630    |   27 × 1 1/4-------------|-----------------------------------------------------32-635    |   28 × 1 1/2 × 1 1/8             700 × 28 B|                                  700 B Course-------------|-----------------------------------------------------37-288    |                                  350 A Comfort|                                  350 A 1/2 Balloon-------------|-----------------------------------------------------37-298    |   14 × 1 3/8-------------|-----------------------------------------------------37-337    |   16 × 1 3/8 ANL-------------|-----------------------------------------------------37-340    |   16 × 1 3/8 NL                  400 A Comfort|                                  400 A 1/2 Balloon|                                  400 × 42 A|                                  400 × 35 A-------------|-----------------------------------------------------37-349    |   16 × 1 3/8 NL-------------|-----------------------------------------------------37-387    |   18 × 1 3/8-------------|-----------------------------------------------------37-390    |                                  450 A Comfort|                                  450 A 1/2 Balloon-------------|-----------------------------------------------------37-400    |   18 × 1 3/8-------------|-----------------------------------------------------37-438    |   20 × 1 3/8NL-------------|-----------------------------------------------------37-440    |                                  500 A Comfort|                                  500 A 1/2 Balloon-------------|-----------------------------------------------------37-451    |   20 × 1 3/8-------------|-----------------------------------------------------37-489    |   22 × 1 3/8 NL-------------|-----------------------------------------------------37-490    |                                  550 A Comfort|                                  550 A 1/2 Balloon-------------|-----------------------------------------------------37-498    |   22 × 1 3/8 × 1 1/4 NL-------------|-----------------------------------------------------37-501    |   22 × 1 3/8-------------|-----------------------------------------------------37-540    |   24 × 1 3/8-------------|-----------------------------------------------------37-541    |                                  600 A Comfort|                                  600 A 1/2 Balloon|                                  600 × 35 A-------------|-----------------------------------------------------37-565    |   25 × 1 3/8-------------|-----------------------------------------------------37-584    |   26 × 1 1/2 × 1 3/8|   26 × 1 3/8 × 1 1/2-------------|-----------------------------------------------------37-590    |   26 × 1 3/8                     650 A|                                  650 × 35 A-------------|-----------------------------------------------------37-622    |   28 × 1 5/8 × 1 3/8             700 × 35 C|   28 × 1 3/8 1 5/8-------------|-----------------------------------------------------37-642    |   28 × 1 3/8                     700 × 35 A-------------|-----------------------------------------------------40-279    |   14 × 1 1/2                     350 × 38 B-------------|-----------------------------------------------------40-288    |   14 × 1 1/2 NL                  350 × 38-------------|-----------------------------------------------------40-330    |   16 × 1 1/2                     400 × 38 B-------------|-----------------------------------------------------40-432    |   20 × 1 1/2-------------|-----------------------------------------------------40-440    |   20 × 1 1/2 NL                  500 × 38-------------|-----------------------------------------------------40-534    |   24 × 1 1/2-------------|-----------------------------------------------------40-540    |   24 × 1 3/8 × 1 1/2|   24 × 1 1/2 × 1 3/8-------------|-----------------------------------------------------40-571    |   26 × 1 1/2 C.S.|   26 × 1 5/8 × 1 1/2NL-------------|-----------------------------------------------------40-584    |   26 × 1 1/2                     650 × 35 B|                                  650 × 38 B-------------|-----------------------------------------------------40-590    |   26 × 1 3/8 × 1 1/2 NL-------------|-----------------------------------------------------40-622    |   28 × 1 5/8 × 1 1/2 NL          700 × 38 C-------------|-----------------------------------------------------40-635    |   28 × 1 1/2 × 1 3/8             700 B Estándar|   28 × 1 1/2                     700 × 35 B     |                                  700 × 38 B-------------|-----------------------------------------------------44-194    |   10 × 1 5/8-------------|-----------------------------------------------------44-288    |   14 × 1 3/8 × 1 5/8             350 A  |                                  350 × 42A-------------|-----------------------------------------------------44-340    |   16 × 1 5/8-------------|-----------------------------------------------------44-428    |   20 × 1 5/8 × 1 1/2-------------|-----------------------------------------------------44-484    |   22 × 1 5/8 × 1 1/2-------------|-----------------------------------------------------44-531    |   24 × 1 5/8 × 1 1/2-------------|-----------------------------------------------------44-584    |   26 × 1 1/2 × 1 5/8              650 B Semi-comfort|   26 × 1 5/8 × 1 1/2             650 B 1/2 Balloon|   26 × 1 3/4 × 1 1/2             650 × 42B-------------|-----------------------------------------------------44-622    |   28 × 1 5/8                     700 × 42 C-------------|-----------------------------------------------------44-635    |   28 × 1 5/8 × 1 1/2    |   28 × 1 1/2 × 1 5/8-------------|-----------------------------------------------------47-203    |   12 1/2 × 1.75 × 2 1/4-------------|-----------------------------------------------------47-222    |   11 × 1 3/4-------------|-----------------------------------------------------47-305    |   16 × 1.75 × 2-------------|-----------------------------------------------------47-317    |   16 × 1 3/4-------------|-----------------------------------------------------47-355    |   18 × 1.75 × 2-------------|-----------------------------------------------------47-406    |   20 × 1.75 × 2 |   20 × 1.75-------------|-----------------------------------------------------47-419    |   20 × 1 3/4-------------|-----------------------------------------------------47-501 T  |   24 × 1 3/4 R                   600 × 45 C-------------|-----------------------------------------------------47-507    |   24 × 1.75 × 2 |   24 × 1.75-------------|-----------------------------------------------------47-520    |   24 × 1 3/4-------------|-----------------------------------------------------47-559    |   26 × 1.75 × 2 |   26 × 1.75-------------|-----------------------------------------------------47-571    |   26 × 1 3/4                     650 × 45 C     |   26 × 1 5/8                     650 C S.C.-------------|-----------------------------------------------------45-584    |   26 × 1.75 × 1 1/2              650 × 45 B|   26 × 1 1/2 × 1 3/4-------------|-----------------------------------------------------47-622    |   28 × 1 3/4                     700 × 45 C|   28 × 1.75     |   28 × 15/8 1 3/4-------------|-----------------------------------------------------54-298    |   14 × 2 × 1 3/4-------------|-----------------------------------------------------54-305    |   16 × 2-------------|-----------------------------------------------------54-400    |   20 × 2 × 1 3/4        |   20 × 2 F 4 J-------------|-----------------------------------------------------54-406    |   20 × 2.00-------------|-----------------------------------------------------54-428    |   20 × 2-------------|-----------------------------------------------------54-559    |   26 × 2.00-------------|-----------------------------------------------------54-571    |   26 × 1 3/4 × 2        |   26 × 2 × 1 3/4        |   26 × 2                         650 × 50 C-------------|-----------------------------------------------------54-584    |   26 × 2 × 2 1/2        |   26 × 1 1/2 × 2-------------|-----------------------------------------------------54-609    |   28 × 2-------------|-----------------------------------------------------57-239    |                                  300 × 55 A-------------|-----------------------------------------------------57-251 T  |                                  315 × 55-------------|-----------------------------------------------------57-305    |   16 × 2.125    |   16 × 2.125 × 2-------------|-----------------------------------------------------57-390    |                                  450 × 55 A-------------|-----------------------------------------------------57-406    |   20 × 2.125    |   20 × 2.125 × 2-------------|-----------------------------------------------------57-507    |   24 × 2.125    |   24 × 2.125 × 2-------------|-----------------------------------------------------57-559    |   26 × 2.125    |   26 × 2.125 × 2-------------|-----------------------------------------------------62-203    |   12 1/2 × 2 1/4                 320 × 57-------------|-----------------------------------------------------62-305    |   16 × 2.125-------------|-----------------------------------------------------67-203    |   13 × 2 1/2                     330 × 65-------------|-----------------------------------------------------67-381    |   20 × 2 1/2-------------|-----------------------------------------------------

Se permite la inclusión de los marcajes antiguos a continuación del ISO5775 entre paréntesis.

La norma ISO 5775-2 define los códigos de las llantas, y distingue entre:

Las llantas se designan por su diámetro nominal y su anchura nominal separados por un aspa (×). Ambas se miden en milímetros. Las llantas de tipo SS o HB llevan estas siglas delante del nombre mientras que las de tipo C la llevan al final. Ejemplos:

La anchura nominal de una llanta es la anchura interior tal y como se mide con un calibre.

La anchuras estadarizadas pora las de pared recta (SS) son:

para las de tipo crotchet (C):

Y para las de hooked-bead (HB):

Los diámetros estandarizados para las llantas de tipo SS y C son:

Los diámetros estadarizados para las llantas HB son: