https://www.cateyeamerica.com/tire-size-calculator/
So just for sport-
26" wheel- I'll estimate a 1.5x26 (40-559) tire, rolling circumference 2005mm per Cateye
88 RPM ave cadence
42 chainring 15 cog = 2.8 ratio (my reasonable guess)
16.1 km TT
rate = 2005 x 88 x 2.8 = 494.03 M/min
time = 16100 / 494.03 = 32.58 min, in the ballpark
If your rolling circumference was 2042 then with the above your time would be 31.99 min