That sounds like a great modification for the Fendt 500 series! Wide tires can be really helpful in improving traction and stability, especially in challenging field conditions. Having a wide choice of colors adds a nice touch of customization for users who like to personalize their equipment. With a good power range from 131 to 171hp, this modified version of the Fendt 500 should offer a good balance between performance and efficiency. And a maximum speed of 50 km/h can be very useful for getting work done quickly on the farm. Overall, it seems like a well-rounded enhancement for this popular tractor series.