Regulation No 26 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of vehicles with. ECE R26 Regulation (03 Series, ) “The uniform regulations on vehicle chapter and section numbering betw een this standard and the ECE R ECE UNIFORM PROVISIONS CONCERNING THE APPROVAL OF: VEHICLES WITH REGARD TO THEIR EXTERNAL PROJECTIONS Incorporating.

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OJ L 70, 9. It usually consists of two major parts:. Replacement wheels may belong to one of the following category:. They differ from vehicle manufacturer’s replacement wheels only by the absence of vehicle manufacturer’s trademarks and part number.

With regard to the design basic sce, dimensions, inset, material type and quality and eec on and service life they fully correspond to vehicle manufacturer’s replacement wheels. With regard to the design, inset, rim designation wheel fixing PCD and spigot mounting diameter, correspond to that of an OE-wheel, but wheel contour, material and so on, may be different. The Tyre and Rim Association Inc.

Licenses and Certificates

The application for approval of a wheel type shall be submitted by the manufacturer, or by his duly accredited representative, and shall be accompanied by:. Drawings, in triplicate, sufficiently detailed to permit identification of the type. They shall also show the position intended for the approval mark and for the wheel ecr.

Sample wheels representative of the wheel type necessary for the execution of laboratory tests or test reports issued by the Type Approval Authority. An approval number shall be assigned to each type approved. The first two digits at present 00 for the regulation in its original form shall indicate the series of amendments incorporating the most recent rr26 technical amendments made to the R2 at the time of issue t26 the approval.

The same Contracting Party may not assign the same number to another type of wheel. The approval mark shall be permanent, visible and clearly legible, when the tyre is fitted on the wheel. The wheel manufacturer’s facilities may be used for test purposes provided that the Type Approval Authority or a designated representative witnesses the tests. The wheel shall be permanently and legibly marked as follows, in a position chosen by the manufacturer, but visible g26 the tyre is fitted on the wheel:.

It shall be expressed according to the prescription of one International Tyre and Rim Standards and includes at least:. Rim contour shall conform to the International Standard specified by the wheel manufacturer. R266 replica replacement wheels and pattern part replacement wheels shall satisfy the following tests:. If the ecf within a production line is always the same, only one representative test is to be carried out.

Where a wheel manufacturer submits application for type approval for a range of wheels, g26 is not considered necessary to carry out all tests on every type of wheels in the range.

Pattern part replacement wheels shall satisfy the following requirements to guarantee proper fitment on the vehicle:. The nominal rim diameter, nominal rim width and nominal inset of ECE-approved wheels shall be the same as the manufacturer’s replacement wheel. Wheels shall be suitable for tyres of the tyre size designations specified initially by the vehicle manufacturer for the particular model concerned. Every modification of the wheel type shall be notified to the approval authority which granted the type approval.

The approval authority may then:. The competent authority issuing the extension of ec shall assign a series number to each communication form drawn up for such an extension. The authority which has granted type approval may at any time verify the conformity control methods applied in each production facility. The normal frequency of these verifications shall be once every two years.

The approval granted in respect of a type of wheel pursuant to this regulation may be withdrawn if the requirements set forth above are not met or if a wheel bearing the approval mark does not conform to the type approved. If the holder of an approval completely ceases to manufacture a wheel approved in accordance with this regulation, he shall so inform the authority which granted the approval. The Contracting Parties to the Agreement applying the regulation shall communicate to the United Nations secretariat the names and addresses of the Technical Services responsible for conducting approval tests and of the administrative departments which grant approval and to which forms certifying approval or extension or refusal or withdrawal of approval, or production definitely discontinued issued in other countries, are to be sent.


The first two digits of the approval number indicate that the approval was granted in accordance with the requirements of Regulation No XY in its original form. The marking of approval mark, the Regulation number and approval number may be at a distance from each other respecting the sequence. Example of markings which shall be applied to a wheel conforming to this Regulation:.

The rim designation shall include in the following order the rim contour designation, the construction, the nominal rim diameter code, the location of the well and the bead-seat configuration, as in the example 5 J x 14 FH.

It is also permitted to reverse the order for the first three elements as in the example 14 x 5 J FH.

Certificates and licenses

The marking of the wheel inset, the date of production and manufacturer’s name may be at a distance from the rim designation. Check of the following mechanical characteristics R p0,2R mand A relevant to the materials:.

Permanent elongation of the gauge length after fracture L u — L oexpressed as a percentage of the original length L o. Stress at which a non-proportional extension is equal to a specified percentage of the extensometer gauge length L e.

Stress corresponding to the maximum force F m. Check of the mechanical characteristics R p0,2R mand A of test-pieces taken from the hub mounting area and in the disc to rim transition area or in the failure zone if any. Analysis of the metallurgic defects and of the test-pieces structure taken from the hub mounting area and in the disc to rim transition area or in the failure zone if any.

A surface treated sample, taken from production, shall be damaged by cross engraving and stone impact ISO to represent damaging situations during the normal usage of vehicle damage shall be in the area of the rim flange and inside the wheel. The surface treated sample shall pass a salt-spray test, in which the sample and any components with which is normally in contact are put in upright position into the salt-spray test equipment.

Individual measures which may affect the corrosion are to be evaluated covers, crews, zinc or cadmium buses, alloy insulating covers, etc. The test documentation shall include photos showing the main corrosion points which have been mechanically washed in order to show the material defects. During the rotating bending test, the lateral forces acting on wheel in driving around a curve are simulated. The wheel rim is fixed rigidly to the test bench, and a bending moment M b is applied to the hub mounting area i.

Light alloy wheels are fixed using the internal rim flange by two semicircular flanges. Cars and off-road vehicles: The number of cycles per minute can be the maximum possible but outside the testing rig resonance frequency. Wheel versions having a larger centre hole shall be included in the test. In the case of a failure further samples shall be tested. Tests to be carried out should the maximum permitted wheel load subsequently increase. Should the testing moment be increased of more of 10 per cent, when compared to the first approval, the whole programme shall be repeated.

Two wheels shall be tested. Taken from normal series production and, if possible, of the maximum nominal section width recommended for the wheel. Wheel strength with regard to the fractures on ede and other critical points when the wheel strikes an obstacle shall be checked. The tyre pressure recommended by the tyre manufacturer based on the load index and the max.

Tyres taken from normal series production with the minimum nominal section width and minimum rolling circumference on the range of tyres recommended for the particular wheel. The test shall be considered satisfactory if there is not any visible fracture penetrating through the wheel surface and if there is not any loss of inflation pressure within one minute of completing the test. Fractures and indentations caused by the direct contact with the falling weight are acceptable.


In the case of wheels with demountable rims or other components that can be dismantled, if threaded fastenings that are close to the spoke or ventilation holes fail the wheel is to be considered as having failed the test. One in the area connecting spokes to rim and further one in the area between two spokes, very close to the valve hole. If possible, the impact direction shall not coincide with the radial line between a fixing hole and the wheel centre.

This annex specifies a laboratory test procedure to evaluate the axial lateral kerb impact collision properties of a wheel manufactured either wholly or partly of light alloys. New wheels, fully processed, representative of wheels intended for passenger car application, fitted with a tyre. The tyre mounted on the test wheel shall be the smallest nominal section width tubeless radial-ply tyre intended for use on that wheel. Ensure that the wheel is mounted on the hub fixture with dimensionally representative fixings such as would be used on a vehicle.

Manually tighten the fixings to a value or by a method as recommended by the vehicle or wheel manufacturer. Because the design of wheel centre members may vary, test a sufficient number of locations on the wheel rim circumference to ensure that the integrity of the centre members is assessed.

Use new wheels each time. In case of test on the spoke, that spoke is to be chosen where the bolt hole is closest. The wheel is not considered to have failed the test by deformation of the wheel assembly or by fractures in the area of the rim section struck by the face plate of the striker. Tyres and wheels used in the tests should not be used subsequently on a vehicle.

In an alternating torque test the torque acting on wheel during braking and acceleration is simulated.

The type approval authority shall be supplied with a copy of following information which shall also be supplied to the consumer with the wheel. ECE approval number, wheel type and variant, international rim designation for example, 15 H2 x 5 J and inset. Any particular requirements, special fittings and so on that are specified when using the manufacturer’s replacement wheels or specific requirements for the ECE approved wheel.

Recommendations and safety precautions when fitting the wheel. Use of any additional or substitute wheel fixing components, for example, longer wheel bolts or studs with alloy wheels. Example of a possible structure of the Application and fitting Information table. Wheel characteristics mandatory eece in bold characters. The design of the inner contour of the wheel wheel calliper see Figure 1 must provide sufficient space for the ecee, suspension and steering components. In the case e26 the wheel calliper is outside of the vehicle manufacturer’s replacement wheel calliper, no verification is necessary.

In the case where the calliper is inside the vehicle manufacturer’s replacement wheel calliper, a check shall be carried out of wheel operating clearance with respect to brake, suspension and steering components and general under body components, taking into account the effect of wheel balance weights.

The check may be carried out statically or dynamically. If the various clearances on the vehicle manufacturer’s replacement wheel are less than those given above, then these can be accepted. An approved wheel shall not reduce the brake efficiency in comparison with a fce replacement wheel.

EUR-Lex Access to European Union law

The heat transfer from the brakes into steel wheels is regarded as being more severe than that with of light alloy wheels. Type I rr26 Fade test procedure. The criterion is the brake temperature.

The maximum temperature measured discs, drum using the vehicle manufacturer’s replacement wheel must not be exceeded with the wheel to be approved. The use of vehicle manufacturer’s replacement wheel fixing components is recommended. Any special wheel fixing components shall allow fitting of the pattern part replacement wheel without requiring any additional change.

The basic number of wheel fixings, for example 4 holes, 5 holes and so on, shall not be changed.