This is the default New Holland T7 Heavy Duty tractor with the wide wheels setup removed and two dual (twin) wheel setups added. All of the tires for the dual wheel options are the narrow tires from Giants. The first two wheel setups are the default standard and wheel weights options, and have not been changed. The third wheel setup (Rear twin wheels) has dual narrow wheels on the rear and narrow single wheels on the front. The fourth wheel setup (Narrow twin wheels) has narrow dual wheels front and rear.
Place the zip file(NewHollandT7_Duals.zip) in the Farming Simulator 2017 mods folder. When starting the game on the MODS/DLC page enable New Holland T7 Duals by checking in the circle. The mod will be in the tractor category of the store to the right, after all of the default tractors. Select it and then select the desired wheel setup under Options & Upgrades.