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Remove and replace cycle derailleur gear components

URN: IMICY07
Business Sectors (Suites): Maintenance and Repair - Cycle
Developed by: IMI
Approved on: 30 Mar 2022

Overview

This standard is about removing and replacing derailleur gear components so the cycle is left in a safe and roadworthy condition. 

In this standard the term ‘cycle’ includes pedal-propelled vehicles with two, three or four wheels. It may also include pedal-assisted e-bikes:
• Road legal up to 15.5 mph with a motor with an output of up to 250w
• E-cycles used for other purposes

Performance criteria

You must be able to:

P1 use suitable personal protective equipment throughout all cycle derailleur gear component remove and replace activities
P2 ensure the cycle and the work area is safe prior to work commencing
P3 support your removal and replacement activities by reviewing:

P3.1 cycle technical data
P3.2 removal and replacement procedures
P4 identify components relevant to cycle derailleur gear component removal and replacement 
P5 prepare, check and use all the tools and equipment required following manufacturer’s instructions
P6 carry out all cycle derailleur gear component remove and replace activities following: 

P6.1 manufacturer’s instructions
P6.2 industry recognised  methods
P6.3 your workplace procedures
P6.4 health, safety and environmental requirements
P7 work in a way which minimises the risk of:

P7.1 damage to the cycle, its systems and components
P7.2 damage to your working environment
P7.3 injury to self and others
P8 use suitable testing methods to accurately evaluate the performance of the reassembled system 
P9 ensure the reassembled system performs to the cycle operating specification 
P10 promptly report any problems or issues relating to the cycle’s condition or conformity  to the relevant person(s) 
P11 ensure your records are accurate, complete and promptly passed to the relevant person(s) in the format required
P12 complete all cycle derailleur gear component remove and replace activities within the agreed timescale
P13 promptly report any anticipated delays in completion to the relevant persons(s)

Knowledge and Understanding

You need to know and understand:

Legislative and organisational requirements and procedures
K1 the health and safety legislation, environmental requirements and workplace procedures relevant to cycle derailleur gear component remove and replace activities and personal and cycle protection
K2 your workplace procedures for:

K2.1 recording removal and replacement information
K2.2 the referral of problems
K2.3 reporting delays to the completion of work
K3 how to work safely avoiding damage to other cycle systems, components and units and injury to self and others
K4 the importance of documenting cycle derailleur gear component remove and replace information
K5 the importance of working to agreed timescales and keeping others informed of progress
K6 the importance of promptly reporting anticipated delays to the relevant person(s)

Use of technical information
K7 how to find, interpret and use sources of current technical information applicable to cycle derailleur gear components remove and replace activities
K8 the importance of using the appropriate sources of technical information

Tools and equipment
K9 how to select, prepare, check and use all the removal and replacement tools and equipment required

Cycle derailleur gear component removal and replacement
K10 how to identify the components in cycle derailleur gear systems
K11 how to identify compatibility of components within the group set
K12 how to identify wear in the system
K13 how to calculate chain length, compatibility
K14 how to identify chain joining methods
K15 how to check and rectify gear hanger alignment
K16 the difference between cassettes and freewheels
K17 how to remove and replace cycle derailleur gear components for the types of cycle on which you work
K18 how to route cables and index gear systems
K19 how to use testing methods to evaluate  the performance of replacement cycle derailleur gear components and the reassembled system against the cycle operating specifications and any legal requirements
K20 the manufacturer’s specification for the type and quality of components to be used

Scope/range

1. Tools and equipment are:

1.1 hand tools
1.2 work stand
1.3 gear hanger alignment tool

2. Components are:

2.1 chain
2.2 derailleurs
2.3 cable and casing/housing
2.4 shift levers
2.5 cassette

2.6 freewheel
2.7 chain rings

3. Testing methods are:

3.1 functional
3.2 measurement

Scope Performance

Scope Knowledge

Values

Behaviours

Skills

Glossary

This section contains examples and explanations of some of the terms used but does not form part of the standard.

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Agreed timescales
Examples include industry recommended work times, job times set by your company or a job time agreed with a specific customer

Conformity
Examples include conformity to approvals and specifications, UK and European legal requirements where applicable

Cycles
In this standard the term ‘cycle’ includes pedal-propelled vehicles with two, three or four wheels on which the rider sits. It may also include pedal-assisted e-bikes:
• Road legal up to 15.5 mph with a motor with an output of up to 250w
• E-cycles used for other purposes 

Links To Other NOS

External Links

Version Number

1

Indicative Review Date

30 Mar 2025

Validity

Current

Status

Original

Originating Organisation

IMI

Original URN

CY07

Relevant Occupations

Cycle Technician, Advanced Cycle Technician

SOC Code

5223

Keywords

Cycle; derailleur; gear; hanger; lever; freewheel