Steering wheel cover Medium from Sparco for steering wheels / /μ/ε/σ/α/ί/α/ς/ / in diameter (37cm). It is a simple application, which means it is ready to be applied to the steering wheel without any additional actions. It is made of leatherette or synthetic leather, a material that is extremely smooth and does not require continuous care like natural leather. Leatherette provides a softer feel to the hand while driving. At the same time, it protects against wear and enhances the interior appearance of the car.