MT-21 Rear Tire Size

The MT-21 seems to be a fairly large tire for it's advertised size. For those who have used one, which is the closet to our original "Deathwing". The 110/80 or the 120/80? Trying not to change my gearing much. I used these years ago on a DR350, but hard to remember back 20 years.

The 120/80 is the stock size and, Being it's what I run, I can say I noticed no difference in gear ratio when I switched from the TW...good difference in bite though!