Curious About Individual Road Averages? Where We 'Stand'...
#128
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#129
Non omnino gravis
I can't speak for the pedals directly, but power measurement is power measurement, so... directly. Last Friday, I rode from my house to the beach-- about 75 miles. It was all fine and dandy until I hit the headwinds about 15 miles from the coast.
Miles 0-30:
Avg. speed: 19.5mph
Avg. power: 182W
Avg. HR: 134bpm
Miles 31-58:
Avg. speed: 18.7mph
Avg. power: 174W
Avg. HR: 140bpm
Miles 59-74:
Avg. speed: 16.9mph
Avg. power: 192W
Avg. HR: 150bpm
That's what headwind looks like. 10% more power to go 10% slower.
#130
Senior Member
I can't speak for the pedals directly, but power measurement is power measurement, so... directly. Last Friday, I rode from my house to the beach-- about 75 miles. It was all fine and dandy until I hit the headwinds about 15 miles from the coast.
Miles 0-30:
Avg. speed: 19.5mph
Avg. power: 182W
Avg. HR: 134bpm
Miles 31-58:
Avg. speed: 18.7mph
Avg. power: 174W
Avg. HR: 140bpm
Miles 59-74:
Avg. speed: 16.9mph
Avg. power: 192W
Avg. HR: 150bpm
That's what headwind looks like. 10% more power to go 10% slower.
#131
Senior Member
Ranging in price from under a hundred to almost $2.5k I'm guessing some of it must be guessing (just using algorithms to calculate wattt). How doGarmin Vector 3 power meter pedals at a grand, for example, measure the effect of headwinds involved in two otherwise identical rides? No obsession though-- I have the capability on my indoor trainer but it doesn't seem to translate to riding in the wild.
#132
Non omnino gravis
#133
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Thread Starter
I'm familiar with strain gauges and thought of the expense relative to the cost of the bike itself as being high but I see there have been some innovations in this area-- just read about an allegedly accurate device that goes for $199 -- includes accelerometers, wind pressure and elevation sensors to measure a panoply of opposing forces...
#134
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Ranging in price from under a hundred to almost $2.5k I'm guessing some of it must be guessing (just using algorithms to calculate wattt). How doGarmin Vector 3 power meter pedals at a grand, for example, measure the effect of headwinds involved in two otherwise identical rides? No obsession though-- I have the capability on my indoor trainer but it doesn't seem to translate to riding in the wild.
Your continuous comments on power and the like throughout this thread suggest quite an infatuation. You don't need to spend $2.5k. A brand new C1 chainring for $350, or a used powertap for $300 bucks, or even a used SRM for $300-400 bucks will satisfy all of these curiosities and clear up a lot of the misinformation you've somehow come up with.
#135
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I'm familiar with strain gauges and thought of the expense relative to the cost of the bike itself as being high but I see there have been some innovations in this area-- just read about an allegedly accurate device that goes for $199 -- includes accelerometers, wind pressure and elevation sensors to measure a panoply of opposing forces...
When you can pay 100-200 dollars more for an actual powermeter that provides power produced from both legs, it's pretty absurd to depend on something that is allegedly accurate for data needs.
#136
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Thread Starter
The past 20 years have shown the "allegedly accurate devices" to be found wanting by a whole lot.
When you can pay 100-200 dollars more for an actual powermeter that provides power produced from both legs, it's pretty absurd to depend on something that is allegedly accurate for data needs.
When you can pay 100-200 dollars more for an actual powermeter that provides power produced from both legs, it's pretty absurd to depend on something that is allegedly accurate for data needs.
#138
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I'm familiar with strain gauges and thought of the expense relative to the cost of the bike itself as being high but I see there have been some innovations in this area-- just read about an allegedly accurate device that goes for $199 -- includes accelerometers, wind pressure and elevation sensors to measure a panoply of opposing forces...
#140
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A brand new pair of Powertap/DT Swiss wheels is $549, so you're getting a new pair of wheels and one of the better, more established powermeters on the market. I think there are some P2Max units that are under $700. And of course used you can get Quarqs and SRMs and the like for $400-800.
#141
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Power2Max crank-based (not single-sided) power meters start at $490.
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