53/39t 110mm bcd rings are available - which means you do not even have to swap chainsets, just change the rings. Why do you want to swap, out of interest..??
i have a ultegra group set on a not as good frame and was thinking that i could swap the whole lot over , but some retailers are saying no it cant be done, one said i would need a insert and a new bb then it can be done , so i was getting confused as to what can be done
they also said i could'ent just change the rings ,
if i cant change the chain set , although you guys are saying that it can be done ,
can i just change the front and rear mech , brakes and shifters , will the chain set that it comes with be a nice quality if i keep it on their ?