A brake tester (100) for a vehicle (50) comprises a support structure (10) on which at least a measurement plate (30) is mounted, arranged to be crossed by at least a wheel (51) of a vehicle (50), during a brake test. A measurement unit (300) is, furthermore, provided configured to measure the vertical and/or horizontal forces acting on the, or each, measurement plate (30) and to convert them into values indicative of the efficiency of the vehicle braking system (50). The brake tester (100) provides that each measurement plate (30) of which is constituted of is a plate (40) comprising a base surface (31) from which a plurality of protuberances (35) protrudes provided of a through hole (38) and arranged according to a predetermined pattern. The protuberances (35) are configured in such a way to define, at their top, a support plane (γ) for the wheels (51) of the vehicle (50) during a brake test.
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