Scott Addict R4 seatclamp size

[hm123]

hello everyone
i have scott addict r4 bike 2008 the seatclamp has broken [its isp] i need to buy new one i dont know the size i need is it
a 31.8mm or 35mm
right now i have a sram red on it i want to change to Campagnolo Super Record [i have 2010] do i need to change something on the bb
please help i cant ride now
thank you and have a nice day

[5 8 5]

I assume you mean the Ritchey Stubby? The size is 30.25mm.

Re. your bottom bracket. I think it's a standard BSA (not integrated) so would require Campag Ultra Torque cups to be fitted.