These BLACK 70-ton Barber S-2-A Roller Bearing Trucks represent an all-new truck offering for Tangent Scale Models. They are SKU 104. This truck comes with separate brake beam part so that the brake shoes will be close to the wheels, just like the prototype. These BLACK trucks come with 33″ all-metal normal tread (RP25 ,110″) wheels. If you desire semi-scale “Code 88” tread wheels with these trucks, those are available as well (SKU 105).