The Stelvios are pretty quick....... for a start

time trialling with 16 inch wheels is amusing rather than quick with a 29lb Moulton Mk1, it does have aerobars and alloy rims etc..
fastest 10 so far is 27 minutes.... I have done 26 on the same course on my tt bike whilst not trying that hard.
A flat course and I think there may not be a lot in it tbh, also little wheels are more aerodynamic so head winds are possibly easier.
Last night the time trial was on a slightly rolling course with one large lump near the end, the wind was very strong in my face on the way back, but it was the hill that killed my speed the most, it would have been the other way on my tt bike. I was averaging 22mph until the hill and it was 21.4mph at the top, the hill is about 3/4mile long and about 1in15 2 miles from the finish...
Longer distance, 100 mile 5hrs5mins, so not that bad. I am an average tt er
I would recommend it if you want a challenge, it is not as slow as some might imagine and these bikes were raced successfully in the 1960's.
It also gives everyone a laugh and gives you a buzz when you actually catch people who are riding £2k carbon bikes
I am possibly going to try a fast course before the end of this season and use a big gear to see just how fast it will go....