18\" rear mags with disc brake and 20mm axle?

myelr21 wrote:

gpz 750 turbo had 18 front and rear and rear was 3 inch wide.

The standard GPz750 wheels are the same as the Turbo, 18"x3.00" rear and 18" front.

I did have one 18"x2.50" GPz rear wheel, but I think it was off a GPz550.