Originally Posted by
Doug64
Barrettscv,
Good job crunching the numbers. How hard would it be to run it with 150 watt output? It would give some of us another point of reference. I think that is more my output, because I'm about .5 to 1 m ph slower on the easier climbs.
The steepest sustained climb that I've knowingly rode up is 12%. Much steeper than that and my "watt meter" blows a fuse.
Not knowing what 200 watts meant to me as a cyclist, I found this article while looking for information. While still finding it hard to figure out my output, I can relate it to the ability I had when I was a Cat 4 rider, and what I hope is a "fit guy" today. Also this is the peak power for 2 hours. Some of the longer climbs on a tour could be quite a bit longer than 2 hours. From our home to the first major pass into the Cascade Mountains is 35 miles, climbing about 4000 feet. A portion of the distance averages 6%. It takes us about 4 hours to cover that distance on loaded bikes.
Originally Posted by
sstorkel
Sounds like they need to do some more training! I can average 170-180 watts over a 4-5 hour ride and that average includes time spent coasting. My functional threshold power is 240-250 watts and I can easily generate another 100-150 watts just by standing to pedal...
Deciding on a practical power level is not easy. Not only does power output vary on an individual basis, the rider’s weight is also a key factor. Climbing ability comes down to power to weight ratio. Secondly, the duration of the power output needs to match the duration of the climb.
My personal numbers, based on supervised Computrainer data after a one hour sustained 180 watt effort is as follows: 600 watts for 2 minutes and 225 watts for 20 minutes. I can also average 200 watts for one hour after a 15 minute warm-up. The issue for me is that at 200 pounds, I'm never going to be a great climber.
Here is the data for a 150 watt power output (rounded to the nearest 0.5 mph);
Flat & windless = 17 mph
3% climb & windless = 8.5 mph
6% climb & windless = 5.0 mph
9% climb & windless = 3.5 mph
12% climb & windless = 2.5 mph
15% climb & windless = 2.0 mph