Cain, I have the 3/4 axels on my IV and one of the previous owners installed matco wheels and 6.00x6 tires . Spacers are required on the axels to allow use of the matco wheels . It actually made it easier to go back to the atv wheels and the nanco tires once I figured out what had been done since I already had the long axels.
It gets a little confusing trying to sort thru the axels and wheels on the matco site