In such cases, you can accept either marking. For example, a 185/75R14 tyre may be dual marked 185R14. They can be safely mixed in any configuration on a vehicle. ‘Standard’ car tyres have a nominal aspect ratio of 82% (unless marked otherwise) and these are almost identical in size to tyres with an aspect ratio of 80%. For example, a 215/55R15 has an aspect ratio of 55%. The aspect ratio of a tyre is included in the size marking. If you notice a defect on a spare tyre, you should advise the vehicle presenter. You only need to inspect the tyres fitted to the road wheels at the time of the inspection. (d) A wheel and its fixings not compatible (ii) distorted or worn to the extent the wheel or tyre is likely to become detached (i) badly distorted or wear between wheel and hub at spigot mounting (a) Any fracture or welding defect on a wheel You can accept abutting ends on detachable spring retaining rings on wheel rims of semi-drop centre type (identified by the ends of the ring shaped to interlock) as long as the retainer is adequately and safely located in the wheel rim. If you notice a defect on a spare wheel, you should tell the vehicle presenter about it. You only need to inspect the road wheels fitted to the vehicle at the time of the inspection. (ii) worn or damaged to the extent that wheel security is adversely affected (ii) with more than one loose or missing wheel nut, bolt or stud (i) with a loose or missing wheel nut, bolt or stud (ii) play so excessive it is likely to break up or directional control impaired using wheel play detectors in the side to side modeĪlso, rotate each wheel to check for noisy wheel bearings due to excessive roughness.rocking the wheels in turn while they’re jacked clear of the ground.Vehicles with a DGW more than 5,000kg do not need to have rear wheel bearings inspected. (ii) so loose it is likely to affect directional stability (ii) insecure or directional stability is impaired (c) Movement between the stub axle and axle beam: (ii) is so excessive the stub axle is likely to become insecure or directional stability is impaired rocking each wheel by hand or with a bar in the wheel.wheel play detectors in the side to side mode.Then check for play in components using either: Use a suitable bar under each wheel in turn and lever upwards, looking for play in components. Observe the relative vertical movement between components. Jack up the front of the vehicle so that the front wheels are off the ground. (ii) modified so that vehicle stability is impaired or axle functionality affected (ii) insecure such that stability is impaired or functionality affected It’s recommended that you use wheel play detectors when checking axle security on beam axles.
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