The Terry Tailwind is from 2011 with the shimano 105 group set. There are two chainrings in the front.
Little one has 34t and 50t in the big ring. hopefully I didn't look at it incorrectly. 10 cogs in the back. It has 165mm cranks.

Sometimes I'm spinning in the big chainring when I'm on flats.
I don't have a bike computer that calculates my cadence either.
Hopefully these photos help.

Click image for larger version.  Name: unnamed-1.jpg  Views: 343  Size: 63.5 KB  ID: 17639

Click image for larger version.  Name: unnamed-2.jpg  Views: 330  Size: 55.0 KB  ID: 17640

Click image for larger version.  Name: unnamed.jpg  Views: 362  Size: 67.1 KB  ID: 17641