wide tyre on a COSA Rim

With a T5 engine in a GTR,
is it possible to use a 110/90-10 or a 120/90-10 with a COSA rim, instead of the slow tyre 100/90-10 usually used on a COSA ?
Do I need to modify something ?
This is to change the gear rati, and ad more power.
Thanks for your help

click the enlish sip katalog pdf download
take a look at page 18.
you`ll find a good discription and part-list.

sorry for my terrible english, please feel free to korrekt my mistakes