ISO 20957-10:2007

INTERNATIONAL ISO
STANDARD 20957-10
First edition
2007-09-15
Stationary training equipment —
Part 10:
Exercise bicycles with a fixed wheel or
without freewheel, additional specific
safety requirements and test methods
Équipement d'entraînement fixe —
Partie 10: Bicyclettes d'exercice avec une roue fixe ou sans roue libre,
exigences spécifiques de sécurité et méthodes d'essai supplémentaires

Reference number
ISO 20957-10:2007(E)
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ISO 20957-10:2007(E)
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ISO 20957-10:2007(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20957-10 was prepared by Technical Committee ISO/TC 83, Sports and recreational equipment.
ISO 20957 consists of the following parts, under the general title Stationary training equipment:
— Part 1: General safety requirements and test methods
— Part 2: Strength training equipment, additional specific safety requirements and test methods
— Part 4: Strength training benches, additional specific safety requirements and test methods
— Part 5: Pedal crank training equipment, additional specific safety requirements and test methods
— Part 6: Treadmills, additional specific safety requirements and test methods
— Part 7: Rowing machines, additional specific safety requirements and test methods
— Part 8: Steppers, stairclimbers and climbers — Additional specific safety requirements and test methods
— Part 9: Elliptical trainers, additional specific safety requirements and test methods
— Part 10: Exercise bicycles with a fixed wheel or without freewheel, additional specific safety requirements
and test methods
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ISO 20957-10:2007(E)
Introduction
This part of ISO 20957 amends and supplements ISO 20957-1. The requirements of this part of ISO 20957
take priority over those in the general standard.
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INTERNATIONAL STANDARD ISO 20957-10:2007(E)
Stationary training equipment —
Part 10:
Exercise bicycles with a fixed wheel or without freewheel,
additional specific safety requirements and test methods
1Scope
This part of ISO 20957 specifies safety requirements for exercise bicycles with a fixed wheel or without
2
freewheel, which have an inertia > 0,6 kg· m in addition to the general safety requirements of ISO 20957-1.
This part of ISO 20957 should be read in conjunction with ISO 20957-1.
This part of ISO 20957 is applicable to stationary training equipment type exercise bicycles with a fixed wheel or
without freewheel (type 10) (hereafter referred to as training equipment) within the classes S and H.
Any attachment provided with the exercise bicycle with a fixed wheel or without freewheel for the performance
of additional exercises are subject to the requirements of ISO 20957-1.
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.
ISO 4210:1996, Cycles — Safety requirements for bicycles
ISO 12100-1, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology,
methodology
ISO 20957-1:2005, Stationary training equipment — Part 1: General safety requirements and test methods
EN 563, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish
temperature limit values for hot surfaces
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 20957-1 and the following apply.
3.1
flywheel
rotating mass designed to create inertia
3.2
freewheel
gearing mechanism that is designed to disengage the flywheel from the pedal mechanism in one direction
3.3
seat pillar
connection between the frame and the seat, provided to adjust the height of the seat
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ISO 20957-10:2007(E)
3.4
seat tube
part of the frame where the seat pillar is inserted
3.5
handlebar stem
connection between the frame and the handlebar, provided to adjust the height of the handlebar
3.6
emergency brake
equipment designed to stop the movement of the pedals in case of emergency
3.7
locking system
mechanism designed to immobilize any rotating part of the equipment which cannot be operated without the
use of a specific tool, e.g., a key
3.8
dynamic direction
direction in which the force is applied during normal exercise as described in the user's manual
3.9
housing
encasement of potentially hazardous elements
3.10
transmission guard
encasement of potentially hazardous transmission elements
4 Classification
Only the classification as defined in 4.4 of ISO 20957-1:2005 applies.
5 Safety requirements
5.1 External construction
5.1.1 Transmission elements and rotating parts, squeeze and shear points
Training equipment on which the pedal cranks have a greater diameter than the housing, shall have a distance
between the pedal cranks and the stationary parts of the construction of not less than 10 mm. This requirement
does not apply if the housing has a greater diameter than the pedal crank.
Transmission elements shall be covered in accordance with ISO 12100-1. All other parts shall be tested with the
test finger in accordance with ISO 20957-1. The test finger shall not become trapped or come into contact with
2,5 mm
moving parts that do not have a smooth surface. The radius of the edge of the flywheel shall be at least .
The edges of the pedals shall be free of burrs, rounded or protected in some other way.
Test in accordance with 6.1.1 and 6.2.
5.1.2 Temperature rise
When tested in accordance with 6.3, accessible parts of the equipment shall not have a temperature greater
◦
than .65 C
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ISO 20957-10:2007(E)
Key
1 handlebar
2 handlebar adjustment
3 resistance adjustment
4 emergency brake
5 resistance system (brake)
6 flywheel
7seat
8 seat pillar
9 seat adjustment
10 seat tube
11 pedal crank
12 pedal
13 transmission guard
14 frame
Figure 1 — Example of an exercise bicycle without freewheel
5.2 Intrinsic loading
For class S, the seat pillar shall be tested with 4× the maximum body mass specified by the manufacturer, or
4 000 N, whichever is greater. For class H, the seat pillar shall be tested with 3× the maximum body mass
specified by the manufacturer, or 3 000 N, whichever is greater. For both classes, the pedals and the crank shall
be tested with 4× the maximum body mass specified by the manufacturer, or 4 000 N, whichever is greater.
Testing in accordance with 6.4.
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ISO 20957-10:2007(E)
The seat shall be in
...