DucatiBart851
Hi Bart,
The wheels on my 1989 900 Supersport are exactly the same as on my 1990 851. These are white 3 spokes Brembos (3,5”x17 front / 5,5”x17 rear) with the Cagiva logo (the little elephant).
I checked both bikes parts catalogs and part numbers match:
Front: p/n 50120041A
Rear: p/n 50220041A
In a nutshell, 89-90 900ss have the same wheels as 89-90 851s.
Hope this helps.
G