Yeah ... too much resistance at low of rpm... and that's about it. Bike fit
on such a unit is easy enough to get close to a real bike. A string tied to
a socket for a plumb bob and a measuring tape/yardstick can easily get you
in the ballpark saddle fore-aft. Same with bar reach and height. I
Not clipped in so no concerns you had a bad cleat angle with the 5.10s
If you are not used to it, the high resistance and low cadence may simply
be it. I took my Fat bike on a 45 mile gravel ride with a lot of climbing
and the rotational weight (resistance) along with me pushing harder than I