BS ISO 5775-1-2023 PDF

Full title and description

STB BS ISO 5775-1-2023 — Bicycle tyres and rims — Part 1: Tyre designations and dimensions. This document (BS adoption of ISO 5775-1:2023) defines the designation, marking and dimensional series used for pneumatic bicycle tyres (clincher, tubeless, tubeless‑ready, tube‑type and beaded‑edge tyres) and the associated size coding conventions used by manufacturers and suppliers.

Abstract

This standard specifies the nominal size designation, overall size codes and dimensional requirements for pneumatic bicycle tyres intended for various rim types (straight‑side/crotchet, hooked bead). It standardizes the format of tyre markings (section width, rim diameter code and optional overall size code) to ensure interchangeability, clear product identification and compatibility with rims. Tubular sew‑up and non‑pneumatic tyres are excluded.

General information

• Status: Published (national adoption as BS ISO).
• Publication date: 28 July 2023 (ISO publication July 2023; national publication/advertised August 2023 for BS adoption).
• Publisher: International Organization for Standardization (ISO); adopted/published as BS ISO by the British Standards Institution (BSI).
• ICS / categories: 83.160.10 (Road vehicle tyres / Cycles).
• Edition / version: Edition 7 (ISO 5775-1:2023).
• Number of pages: 19 pages.

Scope

Specifies designations, marking and dimensional series for pneumatic bicycle tyres including clincher (wired edge) tyres for straight‑side/crotchet rims, tubeless and tubeless‑ready tyres, tube‑type tyres and beaded‑edge tyres for hooked bead rims. The standard gives nominal section width, nominal rim diameter codes and optional overall size designations (overall diameter and width codes). Tubular sew‑up tyres and non‑pneumatic tyres are not covered.

Key topics and requirements

• Tyre marking and designation format: nominal section width (mm) and nominal rim diameter code; rules for overall size code (diameter × width).
• Nominal rim diameter codes and their correspondence to overall diameter codes (tables of codes for common rim diameters such as 622, 559, 584, etc.).
• Overall width codes and their mapping to millimetre widths (standardized code tables for common tyre widths).
• Coverage of tyre types: clincher (straight‑side / crotchet), tubeless, tubeless‑ready, tube‑type and beaded‑edge tyres for hooked bead rims.
• Exclusions: tubular (sew‑up) tyres and non‑pneumatic tyres are outside the scope.
• Compatibility intent: provides common language to ensure tyre–rim coordination and unambiguous product labelling for supply, installation and regulation.

Typical use and users

Used by tyre and rim manufacturers, product designers, test laboratories, aftermarket suppliers, technical purchasing teams, standards committees and regulatory bodies to ensure consistent size designation, labelling and rim‑tyre compatibility. Also used by bicycle OEMs, quality departments and technical documentation authors.

Related standards

Commonly used together with ISO 5775‑2 (Rims — dimensional and design requirements) and other tyre/rim coordination or tyre terminology standards (for example ISO/TC 31 outputs and national adoptions). Older editions (ISO 5775‑1:2014 / BS ISO 5775‑1:2014) are superseded by this 2023 edition.

Keywords

bicycle tyre, rim, tyre designation, nominal section width, rim diameter code, overall size code, clincher, tubeless, tubeless‑ready, beaded edge, tyre marking, tyre dimensions, ISO 5775

FAQ

Q: What is this standard?

A: STB BS ISO 5775-1-2023 is the British‑adopted edition of ISO 5775‑1:2023 — an international standard that defines tyre designation, marking and dimensional coding for pneumatic bicycle tyres.

Q: What does it cover?

A: It covers how tyre sizes are expressed and marked (nominal section width in millimetres and nominal rim diameter codes), the optional overall size code (diameter × width), and standardized code tables for common tyre/rim sizes. It applies to clincher, tubeless, tubeless‑ready, tube‑type and beaded‑edge tyres and excludes tubular sew‑up and non‑pneumatic tyres.

Q: Who typically uses it?

A: Tyre and rim manufacturers, bicycle OEMs, testing and certification labs, procurement and technical documentation teams, standards committees and safety/regulatory authorities that require consistent tyre sizing and labelling.

Q: Is it current or superseded?

A: Current — ISO 5775‑1:2023 was published in July 2023 (effective date commonly referenced as 28 July 2023) and supersedes ISO 5775‑1:2014 / BS ISO 5775‑1:2014. National adoptions (BS ISO 5775‑1:2023) were issued following the ISO publication.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 5775 series (Part 1: Tyre designations and dimensions). Related parts include ISO 5775‑2 (rims) and other associated documents dealing with tyre/rim coordination and terminology.

Q: What are the key keywords?

A: Nominal section width, rim diameter code, overall size code, clincher, tubeless, beaded edge, tyre marking, tyre dimensions, tyre–rim compatibility, ISO 5775.