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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Power output

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Old 06-01-19, 04:35 PM
  #51  
TrojanHorse
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Originally Posted by DrIsotope
The last worthwhile computer Garmin produced was the Edge 500.
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Old 06-01-19, 04:46 PM
  #52  
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Originally Posted by Seattle Forrest
The lap button is so useful. I don't think cyclists use it as much as we could. It's for anything you want stats for, doesn't have to be actual laps. When I do mixed surface rides, the lap button is how I know how many miles of gravel and how many of pavement I covered.

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Yes it is. I use the crap out of it, as well.
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Old 06-03-19, 08:46 AM
  #53  
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Originally Posted by rubiksoval
220 watts usually buys me 19.5-20 mph with ~50 feet of climbing a mile at 165 lbs in not-super-windy conditions with an aero bike and fast tire setup and generally more-aggressive riding position. 250 + watts is more in the 20.5-21 mph range. 200 watts is more in the 18.5-19 mph range.

Lots of qualifiers there, because lots and lots of things affect speed at various power outputs.
That sounds pretty high for someone 165lbs. I'm 206lbs (non aero bike) and have a measured solo average of 208 watts with normalized at 215 watts for a 21.1mph average for 20.28 miles under similar conditions. I'm using Stages Gen III non drive side PM.

My other solo rides that average in the 20's have slightly lower values as I would expect, such as 195-205 average with normalized at 206-211.

Not knowing how much the OP weighs and assuming it's less than me...his Strava estimate sounds like it's in the ballpark.
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Old 06-03-19, 09:04 AM
  #54  
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At a time that my weight was in the low 150's, I rode a hard 50 miler solo at 235 average watts and an average speed of 21.4 mph. I rode the same basic area as a solo century a couple months later and averaged a smidge over 20 mph and average power of 230. The century ride was a bit windy where the 50 miler was relatively calm. Both were loop kind of things. Garmin Vector (dual) pedals for power.

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Old 06-03-19, 10:30 AM
  #55  
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Originally Posted by jadocs
That sounds pretty high for someone 165lbs. I'm 206lbs (non aero bike) and have a measured solo average of 208 watts with normalized at 215 watts for a 21.1mph average for 20.28 miles under similar conditions. I'm using Stages Gen III non drive side PM.
.
I'd go with that as being a significant potential issue.

Without riding the same course, it doesn't really matter.
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Old 06-05-19, 07:35 AM
  #56  
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Originally Posted by Sojodave
My point about average power not being a good stat to go by was based on if your doing hills or intervals. As an example, your power may be low getting out to the hill or where you do intervals, and it may be low coming back. That doesn't mean you didn't put in a good effort if your overall power average isn't high.
Normalised or weighted average power is the stat to look at, especially if you are doing intervals. And you want to look at that per interval + the intensity factor. Shameless plug: My web app intervals.icu does that quite nicely.
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Old 06-05-19, 09:25 AM
  #57  
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How do you know what your power is during an interval without hitting the lap button? Lap Power is crucial at that point. Obviously, you can watch real time power, but keeping track just seems so much easier.
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Old 06-05-19, 10:21 AM
  #58  
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Originally Posted by davidtinker
Normalised or weighted average power is the stat to look at, especially if you are doing intervals. And you want to look at that per interval + the intensity factor. Shameless plug: My web app intervals.icu does that quite nicely.
Only if you mean the normalized or avg power during the interval. Knowing AP or NP for the entire ride doesn't tell you what you were doing during the intervals.

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Old 06-05-19, 11:48 AM
  #59  
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Originally Posted by davidtinker
Normalised or weighted average power is the stat to look at, especially if you are doing intervals. And you want to look at that per interval + the intensity factor. Shameless plug: My web app intervals.icu does that quite nicely.
Normalized power doesn't work as well for intervals under 20 minutes, and the shorter the duration under that, the less useful it is. The NP for a 29 sec interval is...0.

Definitely not what I look at when doing intervals. Lap power is the stuff.
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Old 06-05-19, 12:56 PM
  #60  
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Originally Posted by rubiksoval
Normalized power doesn't work as well for intervals under 20 minutes, and the shorter the duration under that, the less useful it is. The NP for a 29 sec interval is...0.
Definitely not what I look at when doing intervals. Lap power is the stuff.
I agree, I got that wrong in my answer. Its certainly better to look at the avg power (or torque for low rpm work) for each interval.
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