| Having seen this post earlier today I decided to have a closer look at a S2R that had turned up at Fox's bike night this evening.
Front and Rear Wheels look the same as those on 748/996/998 etc, with the front using the same 25mm diameter spindle, the forks have the standard 65mm spacing from what I could tell but bolted to these are 2-pot sliding callipers that in turn bite on 300mm discs. To me it looked as if the 320mm 748/916/996 discs will bolt straight on to the wheel and would allow you to use the 4-pot callipers including the P34 4 pad type.
Hope that helps
Kev | 
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