More than 30 years of experience
More than 30 years of experience


Our track record in the electric retarders market places us at the forefront of expertise. Our trajectory in the electric retarders market places us at the forefront of experience, bringing peace of mind to every customer.

Our products are approved by the main vehicle manufacturers and we export to more than 30 countries with excellent results. We are an electromagnetic retarder company that stands out for the level of safety it brings to vehicles, cargo materials and passengers. At the same time, we constantly carry out a rigorous control of the production process of the electric retarder components.


Axial retarder

Gearbox Retarder

Safety guarantee


At Pentar Kloft Retarder we work from a detailed manufacturing process with environmentally friendly materials. That is why we do not use pollutants during production. The end result is an electromagnetic non-polluting retarder that under no circumstances emits particles that have a negative impact on the environment. That is why we do not use pollutants during production.


Retarder rotor made of special high-performance alloys, extra light and with a low moment of inertia.

Spare parts

We supply spare parts for any type of electromagnetic retarder components within 48 hours.

Custom long shafts

We manufacture customized long shafts for electric retarders used in dynamometer applications.


We only use specialized first brand bearings resistant to axial movements.

Do you manufacture Dynamometers?

We manufacture custom long shafts for Dynamometer application.

Safety and quality for your vehicles

Why choose our retarders

Weight-dimensions ratio

The weight, dimensions and cooling system integrated in the rotor make it one of the best products on the market.

Quality tests

All components of the electric retarder are constantly evaluated and subjected to quality and laboratory tests.

International homologation

Our electromagnetic retarders are approved by the world’s leading vehicle manufacturers.

Maintenance free

The retarders are maintenance-free due to permanent lubrication with specialized grease. They also have a two-year unlimited mileage warranty.

Do you want to test our electric retarders?

Manufacturing in Europe

As a retarder manufacturer we distribute in more than 30 countries.


contact us

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If you want to acquire electromagnetic retarders, please complete the following form. We will get back to you as soon as possible.

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Proyecto apoyado por FEder

Esta empresa ha recibido una ayuda cofinanciada al 40% por el Fondo Europeo de Desarrollo Regional a través del Programa Operativo FEDER 2021-2027 de Navarra