EN 14766:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mountain-bicycles - Safety requirements and test methodsGorska kolesa – Varnostne zahteve in preskusne metodeBicyclettes tout terrain - Exigences de sécurité et méthodes d'essaiGeländefahrräder (Mountainbikes) - Sicherheitstechnische Anforderungen und PrüfverfahrenTa slovenski standard je istoveten z:EN 14766:2005SIST EN 14766:2006en97.220.4043.150ICS:SLOVENSKI
STANDARDSIST EN 14766:200601-september-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14766November 2005ICS 43.150 English VersionMountain-bicycles - Safety requirements and test methodsBicyclettes tout terrain - Exigences de sécurité et méthodesd'essaiGeländefahrräder (Mountainbikes) - SicherheitstechnischeAnforderungen und PrüfverfahrenThis European Standard was approved by CEN on 7 October 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14766:2005: E

Explanation of the method of least squares for obtaining line of best fit
and ± 20 % limit lines for braking performance linearity.84 Annex B (informative)
Steering geometry.87 Bibliography.89

Introduction This European Standard has been developed in response to demand throughout Europe, and the aim has been to ensure that bicycles manufactured in compliance with it will be as safe as is practically possible. The tests have been designed to ensure the strength and durability of individual parts as well as of the bicycle as a whole, demanding high quality throughout and consideration of safety aspects from the design stage onwards. The scope has been limited to safety considerations, and has specifically avoided standardisation of components. If the bicycle is used on public roads national regulations apply.

1 Scope This European Standard specifies safety and performance requirements for the design, assembly, and testing of bicycles and sub-assemblies intended for off-road, rough-terrain use, and lays down guide lines for instructions on the use and care of such bicycles. It applies to bicycles on which the saddle can be adjusted to provide a maximum saddle height of 635 mm or more. NOTE For bicycles with a saddle height of less than 435 mm see EN 71 and with a maximum saddle height of more than 435 mm and less than 635 mm see EN 14765. It does not apply to racing bicycles and specialised types of bicycle such as tandems or bicycles designed and equipped for use in severe applications such as sanctioned competition events, stunting, or aerobatic manoeuvres. No requirements on lighting equipment, reflectors and warning devices are specified in this European Standard, due to the existence of several different national regulations applicable in the European Countries. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1101, Geometrical Product Specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out ISO 5775-1, Bicycle tyres and rims — Part 1: Tyre designations and dimensions ISO 5775-2, Bicycle tyres and rims — Part 2: Rims ISO 7636, Bells for bicycles and mopeds — Technical specifications ISO 9633, Cycle chains — Characteristics and test methods 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 cycle any vehicle that has at least two wheels and is propelled solely or mainly by the muscular energy of the person on that vehicle, in particular by means of pedals 3.2 bicycle two-wheeled cycle 3.3 tandem bicycle with saddles for two or more riders, one behind the other 3.4 fully-assembled bicycle bicycle fitted with all components necessary for its intended use

Forces and torques…………….0/+5 %
Masses and weights……………± 1 %
Dimensions…………………….± 1 mm
Angles……………………………± 1°
Time duration……………………± 5 s
Temperatures……………………± 2 °C
Pressures………………….± 5 %
4.2 Sharp edges Exposed edges that could come into contact with the rider's hands, legs etc., during normal riding or normal handling and normal maintenance shall not be sharp. 4.3 Security and strength of safety-related fasteners 4.3.1 Security of screws Any screws used in the assembly of suspension systems or screws used to attach generators, brake-mechanisms and mud-guards to the frame or fork or handlebar, and the saddle to the seat- pillar shall be provided with suitable locking devices, e.g., lock-washers, lock-nuts, or stiff nuts.

Key R ≥ 6,3 A ≥ 12,7 B ≥ 3,2 Figure 1 — Examples of minimum dimensions of exposed protrusions
(these apply when L is greater than 8 mm)
Dimensions in millimetres
Figure 2 — Exposed protrusion test cylinder

Key 1 Test cylinder 2 Protrusion shall comply 3 Protrusion need not to comply Figure 3 — Examples of protrusions 4.6 Brakes 4.6.1 Braking-systems A bicycle shall be equipped with at least two independent braking-systems. At least one shall operate on the front wheel and one on the rear wheel. The braking-systems shall operate without binding and shall be capable of meeting the braking-performance requirements of 4.6.7. Brake-blocks containing asbestos shall not be permitted. 4.6.2 Hand-operated brakes 4.6.2.1 Brake-lever position The handbrake levers for front and rear brakes shall be positioned according to the legislation or custom and practice of the country in which the bicycle is to be sold, and the bicycle manufacturer shall state in the manufacturer’s instructions which lever operates the front brake and which lever operates the rear brake (see also Clause 5 a)).

90 mm;  on bicycles on which the minimum intended height of the saddle is less than 635 mm, d shall not exceed
75 mm. Conformance shall be established by the method detailed in 4.6.2.2.2. NOTE The range of adjustment on the brake-lever should permit these dimensions to be obtained. The dimension a, shown in Figure 4 which is used in 4.6.2.2.3 to establish the position for applying test loads, shall be established by the method detailed in 4.6.2.2.2.
Dimension in millimetres
Key a Distance between the last part of the lever intended for contact with the rider's fingers and the end of the lever d Maximum grip dimension Figure 4 — Handbrake-lever grip dimensions 4.6.2.2.2 Test method Fit the gauge illustrated in Figure 5 over the handlebar-grip or the handlebar (where the manufacturer does not fit a grip) and the brake-lever as shown in Figure 6 so that the face A is in contact with the handlebar or grip and the side of the brake-lever. Ensure that the face B spans an area of that part of the brake-lever that is intended for contact with the rider's fingers without the gauge causing any movement of the brake-lever towards the handlebar or grip. Measure the distance a, the distance between the last part of the lever intended for contact with the rider's fingers and the end of the lever (see 4.6.2.2.1, Figures 4 and 5, and 4.6.2.3).

Key A Face A
B Face B
C Rod Figure 5 — Handbrake-lever grip-dimension gauge
Figure 6 — Method of fitting the gauge to the handbrake-lever and handlebar

Key F Applied force b ≥ 25 mm Figure 7 — Position of applied force on the handbrake-lever (see also Figure 4) 4.6.2.3 Handbrake-levers – position of applied force For the purposes of all braking tests in this European Standard the test force shall be applied at a distance, b, which is equal to either dimension a as determined in 4.6.2.2.2 or 25 mm from the free end of the brake-lever, whichever is the greater (see Figure 7). 4.6.3 Attachment of brake assembly and cable requirements NOTE See 4.3 in relation to fasteners. Cable pinch-bolts shall not sever any of the cable strands when assembled to the manufacturer's instructions.
In the event of a cable failing, no part of the brake mechanism shall inadvertently inhibit the rotation of the wheel. The cable end shall either be protected with a cap that shall withstand a removal force of 20 N (accurate to within 0/+5 %) or be otherwise treated to prevent unravelling. The inner cable shall be protected from corrosion, e.g. by a suitable impervious liner to the outer casing. Also, either the inner cable shall have a low-friction coating or the outer casing shall have a low-friction lining. 4.6.4 Brake-block and brake-pad assemblies – Security test 4.6.4.1 Requirement The friction material shall be securely attached to the holder, backing-plate, or shoe and there shall be no failure of the assembly when tested by the method specified in 4.6.4.2. The brake system shall be capable of meeting the strength test specified in 4.6.6 and the braking performance requirements of 4.6.7.4 after completion of the test specified in 4.6.4.2. 4.6.4.2 Test method Conduct the test on a fully assembled bicycle with the brakes adjusted to a correct position with a rider or equivalent mass on the saddle. The combined mass of the bicycle and rider (or equivalent mass) shall be 100 kg. Actuate each brake-lever with a force of 180 N applied at the point as specified in 4.6.2.3 or a force sufficient to bring the brake-lever into contact with the handlebar grip, whichever is the lesser. Maintain this force whilst subjecting the bicycle to five forward and five rearward movements, each of which is not less than 75 mm distance.

Condition Velocity
km/h Brakes in use
Braking distance m Dry 25 Both 6,00
Rear only 10,00 Wet 16 Both 5,00
Rear only 10,00
4.6.7.4.2 Smooth, safe-stop characteristics The bicycle shall show smooth, safe-stop characteristics. i) For the track test, smooth, safe-stop characteristics are defined as stopping within the required distances without occurrence of any of the following: a) excessive juddering; b) front wheel locking; c) bicycle overturning (rear wheel lifting uncontrollably); d) rider's loss of control; e) excessive side-skid causing the rider to put his foot to the ground to retain control. With certain types of braking system, it may not be possible to avoid entirely some skidding of the rear wheel during braking; this is considered acceptable provided that d) or e) above do not occur as a result. ii) For the machine test, smooth, safe-stop characteristics are defined by compliance with the linearity requirements specified in 4.6.7.5.2.3 and the simple track test described in 4.6.7.5.2.7 VIII). 4.6.7.4.3 Ratio between wet and dry braking performance In order to ensure safety for both wet and dry braking, the ratio of braking performance wet:dry shall be greater than 4:10. The methods for calculating this ratio are given in 4.6.7.5.1.11 III) for the track test and in 4.6.7.5.2.7 VII) for the machine test.
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