Belt size for Unorthodox Racing Underdrive Pulley Kit
 

I bought an S1 6 port RX8 last October.
It came with a UR Underdrive pulley Kit.
The alternator belt recently started showing wear.
I want to change them both, but the current alt belt seems to be too long. I only say this because it sometimes squeaks under load and the alt tensioner is currently Maxed out (I.e. it is at the uppermost position).
It is a 3 pulley kit (Alt, Eshaft and water pump). The AC pulley and tensioner pulley look stock.


Does anyone know the correct belt sizes to use with this kit.