I ride a road bike:

On a commute I am typically riding easy, around 16 mph while moving, 13 average.
On a flat stretch riding at a sustainable but very hard pace probably 24 to 26 range.
Long, very hilly ride going hard for several hours about 17 mph
All out sprint on a flat stretch around 32-33 solo, 35+ sprinting out of a bike's draft.
Fastest downhill speed recorded very close to exactly 50 mph (coasting).