100km = 62.14 miles

assuming a few easy hills to climb no big TDF style mountains and no stopping.

Elite pro road racer 24-26 mph / 39-42 kph. About 2.50 hours.

During a TDF stage this could be faster if sprint teams are trying to keep the pace high to stop a breakaway. Could be as high as 28 mph / 45 kph average if the course permits. For a 100 km race, which would be short by pro standards the pace could get very high. Could possibly be done in 2.20-2.30 hours.

Casual recreational rider 12-15 mph / 19-24 kph. About 4.6 hours.

Average semi fit recreational rider 15-18 mph / 24-29 kph. About 3.75 hours.

Local very fit athletic casual racer primarily recreational cyclist 18-22 mph / 29-35 kph. About 3.00 hours.

Basically what it comes down to is that the pro elite road racers can maintain about 100 watts more power over a long time than a regular cyclist.

Regular cyclist can maintain about 120-200 watts continuous power for several hours. Pro riders can maintain 220-300 watts for long periods of time.

As a basic guideline for power:

These are averages not high power moments:

Casual recreational rider usually rides between 100-130 watts.

Average semi fit recreational rider usually rides between 150-180 watts.

Local athletic serious cyclist usually averages between 180-220 watts.

Pro elite road racers usually average between 200-300 watts.


These are long term ranges that riders in these groups can maintain for several hours.