Slate trucks are the narrow gauge counterpart to the Troublesome Trucks. They are used to carry slate along the Crotoonian Hills Narrow Gauge Railway.
The white slate trucks are based on the 2-bar wooden slate wagons of the Talyllyn Railway. The third style of slate trucks are based on the ornate wooden bodied wagons from the Dinorwic Quarry on the 4 ft Padarn Railway. The fourth style of slate trucks are based on the Great Western '2 foot' gauge slate wagon, used on various narrow gauge lines such as the Corris, the Welshpool and Llanfair and the Vale of Rheidol Railways. The Slate wagons are based on a metal bodied wagon featured at the Narrow Gauge Railway Museum.
The slate trucks are entirely grey with black wheels.