I'm not sure, since I never measured a road bike from the TT.

My Raleigh conversion has a 55.8cm TT. The size 50 IRO has a 52cm TT. I like the size of my raleigh but I feel the stem is too short. I feel the need to stretch-out a bit more. This is why I like the Moustache bars.

The Raleigh has a 49cm ST and the IRO has a 46cm ST.

Does this mean that the size 53 IRO which has a 54cm TT and 49cm ST, which is similar to the Raleigh is better for me?

But what about the JEWELS?? Don't they need clearance in case of emergency? Come on guys!! it's the jewels!!! School me!!!