But prior to making these changes you need to consider the information of your vehicle so as not to possess problems when approving the changes and passing the ITV. In the information sheet one of the data that appears may be the MMA of the vehicle, that is, the maximum authorized weight. This really is equivalent to the weight of the vehicle, that is, its Tare, plus its weight with the occupants which is why it's authorized.
The MMA of the vehicle cannot be exceeded
If our car features a MMA of, like 1,500 Kg., A Tare of 950 and five seats we need to do these calculation:
• 5 seats per 75 kg per seat, that is the common applied weight per person = 375 kg
• 375 kg + 950 kg that the vehicle weighs since it originates from the factory = 1325 kg.
• 1500 kg of maximum authorized weight - 1325 grams that already weighs = 175 kg of margin.
That is, the ailerons, skirts and other additions that individuals want to hold our vehicle could in no case exceed 175 kg in weight, since otherwise we would exceed the MMA of our vehicle and would not pass the consequent homologation and therefore they may not need an optimistic ITV ;.
Remember that the tare will be the mass of the vehicle using its authorized fixed equipment, without personnel, passengers or cargo and with a complete way to obtain water, fuel, lubricant, spare parts, tools and necessary accessories.