I just went by the dealer this past week and looked at a 575 with the modluar rims. It seems to have the same rivet pattern as those offered on the 360? Not at home, so don't have the pics. But you're right that the 550B has the 7 rivet design, but are those 18" or 19"?Dj Dirk said:you have 2 versions of that one
1 is the modular rims for the 550/575 wich was based on the rim of the 550 Barchetta
afterwards another one appeared for the 360, and that's this one
the easyiest way to spot the difference
you see those "rivets" at the side of the rim?
this one has 4 in between each spoke
the Barchetta version has 7 in between the spokes