the magnitude of the rotational inertia […] is roughly the same or maybe a bit higher on larger wheels that are probably heavier
The rotational moment of inertia increases a lot due to the larger diameter J ~ m r^2. Even if the masses were the same, the relatively heavy tyre and the rim are further away from the wheel hub.
floquant@lemmy.dbzer0.com 1 day ago
A low center of gravity is more stable than a high one.
Gyroscopic effects do exist on bikes but they are not the main source of stability - it’s the fork geometry, which tends to straighten the handlebar