350X front tire & rim on a 250R?

[BIGKAHUNA]

I saw this on a 250R on Ebay and have since been wondering what the difference in the 250R front tire&rim and the 350X front tire set up. Can anyone shed some light on what the differences are and what sort of advantage it would be to have this setup?

[ATCRYDER]

85/86 R's & 85/86 350X's (as well as 86/87 200x's) are the same size & bolt pattern if im not mistaken. THe onyl differance is the R's are gold, whereas X's are chrome. Someone please correct me if im wrong on the bolt patterns!!!

[xmen]

83-85 200x,86-87 200x , 83-84 250r, 85-86 250r and 85-86 350x have the same bolt pattern...the tire change over the year but always the same size..
And the rear bolt pattern is the same for all these machine...8 and 9 inchs rim , They all came out from the factory with 22inch rear tire except 85-86250r with 20inch tire..