Equivalence Tires
The "Manual de Reformes de Vehicles" published by the Ministerio de Industria,Turismo y Comercio considers that a tire is equivalent to another when:
- Load capacity index is equal to or greater than
- The speed category code is equal to or higher
- The profile of the rim assembly corresponds to the tire
- El diàmetre exterior és el mateix, amb una tolerància del ± 3%
Certio ITV ofereix aquest calculador de pneumàtics per determinar la difeèencia de diàmetre de dos pneumàtics i si es troben dins la tolerància esmentada del ± 3%.

Important:
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This utility only provides the equivalence of the tires regarding their outer diameter. Other parameters can be checked with the marking of the tire and eventually the rim.
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The utility is only applicable for road vehicles belonging to category M, N and O (passenger cars, trucks and their trailers). Mopeds, motorcycles, ATV, agricultural vehicles and special purpouse vehicles are not included.