Case IH Puma CVX 225 with ABS Not so long ago, 50km/hr tractors were seen as innovative. But, to cope with the ever-increasing amounts of road work clocked by today’s prime movers, some manufacturers are now marketing 60km/hr models. Naturally, such top speeds also require a certain up-speccing in the tractors’ braking department, as sported by Case IH’s 60km/hr Puma