As others said, accessibility and cooling. But inboard brakes are still popular in some niche areas, like sandrails: https://www.dieselworldmag.com/wp-content/

As others said, accessibility and cooling. But inboard brakes are still popular in some niche areas, like sandrails: https://www.dieselworldmag.com/wp-content/uploads/2017/03/DW-1510-RAIL-13.png https://www.dieselworldmag.com/wp-content/uploads/2017/03/DW... This particular example doesn't even have front brakes.