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Road Safety (Vehicles) Regulations 2021
201General mass limits for wheels, axles and tyres
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201 General mass limits for wheels, axles and tyres
(1) Subject to subregulation (3), the mass limit for a wheel or an axle is the limit set by the manufacturer of the wheel or axle.
(2) Subject to subregulation (4), the mass limit for a tyre is the greatest load capacity determined for the tyre by the manufacturer at a cold inflation pressure that is not more than—
(a) 825 kilopascals for a radial ply tyre; or
(b) 700 kilopascals for any other tyre.
(3) The Secretary may specify a mass limit for a wheel or an axle if—
(a) the manufacturer of the wheel or axle has not specified a maximum loaded mass for the wheel or axle; or
(b) the manufacturer of the wheel or axle cannot be identified; or
(c) the Secretary considers that the vehicle has been modified to the extent that the manufacturer's specification is no longer appropriate.
(4) The Secretary may specify a mass limit for a tyre if—
(a) the manufacturer of the tyre has not specified a load capacity; or
(b) the manufacturer of the tyre cannot be identified; or
(c) the Secretary considers that the vehicle has been modified to the extent that the manufacturer's specification is no longer appropriate.