Was I showing off about my bigger gear, or taking the piss out of myself for pedalling so slowly? It's TT talk, the only thing that counts is elapsed time. There are people who are slower than me who ride 120", and people faster than me who ride 90", and doubtless vice versa; we testers who are on the cog usually ask what each other has on, but the timekeeper always has the last word.
I was just amused that one person's idea of a big gear was actually so small that I can't fit it on my race bike because the tyre would hit the seat tube. If he gets it round fast enough, he can still ride faster than me, the medium gear record is 53:23 after all.
The time trial I am doing is in Cornwall and has a few hills, 53:17 is as big as I can go and still get up the hills without dropping my cadence significantly.
I drop to 46:17 for my next TT as the first 7.5 miles are all uphill. joys of living in the south west.
on a flat course I would push a big as like you (i think) I don't like to spin out too much and would rather push a bigger gear.
Good luck in your TT