you may need to buy a rear one and convert it to a front axle
(I'd sincerely hope its not going to be ridden on the open road as double discs- I had enough trouble with just a rear disc on the A1 Time trailling once- the lorries and buses bow wave of air pushing you away as the get closer, then followed by the suction effect pulling you in towards the rear wheels)
you may need to buy a rear one and convert it to a front axle
(I'd sincerely hope its not going to be ridden on the open road as double discs- I had enough trouble with just a rear disc on the A1 Time trailling once- the lorries and buses bow wave of air pushing you away as the get closer, then followed by the suction effect pulling you in towards the rear wheels)