xp1000 rims on xp900

Anyone have xp1000 stock rims on an xp900? what issues if any did you have? I have heard so many conflicting stories I don’t know what to believe. Some say spacers needed on rear? some say different length wheel studs and or lug nuts needed? I’m not sure what reality is. I want to run 4 stock xp1000 front rims with 30×10 Big Horns
thanks,
Kelley