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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

Riding pace

Old 09-04-04, 12:52 PM
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Scooby Snax
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Riding pace

I usually ride solo, or mountain bike with others which is allways a different type of riding.
So, If you could give a rough idea of what you all ride solo and convert that to a group ride where you get a draft...?

... or how much of an increase in pace does riding in a group give you.

I've read that in pairs, the second rider gets up to a 30% bonus, the third gets 35%... would you agree or disagree?

Thanks,
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Old 09-04-04, 02:03 PM
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Dunno - sounds a little high to me, but would add that it depends on:

- Amount (if any) of headwind, tailwind, wind hitting you from the side

- Amount and grade of hills ... not going to get much of a draft crawling up a steep hill at 10mph

- Also, keep in mind you will only get the benefit to the extent that you aren't pulling ...

- How close do you stay on the rear wheel of the dude/dudette in front of you?
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Old 09-04-04, 03:42 PM
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Tis true. On a flat road, the second rider uses up to 30% less energy to maintain the same speed as the leader. The 3rd uses up to 35% less. Even the pacer gets a residual benefit - like 5% or so - from the effect of having somebody on his wheel. Apparently it effects the downdraft behind the pacer's head.

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Old 09-05-04, 10:06 AM
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Drafting is one thing and psychology is the other.
When I do ride alone I can average 18-19 mph (40-50m)
On a group ride it goes up to 21-22 mph (distance is 60-80m)
On a group ride I usually have higher effor than when alone - because of chasing, sprints, break aways, etc.
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Old 09-07-04, 05:33 PM
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I usually ride at 21-22 mph for 40 mile rides, when I ride with the team, we usually stay around 24-27
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Old 09-07-04, 10:52 PM
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I found that too, just the other day riding to the store on the bike path I was doing maybe 27 kmph on my mountain bike all of sudden this guy passes me on his mountain bike, even though I'm kinding of cruising i find i pick up my pace so that he's always in site and it doesn't seem to exert me any more than it was before. Strange but cool!
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Old 09-08-04, 12:18 AM
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Note that at reasonable speeds, most energy is spent defeating air resistance, which increases quadratically with velocity. In other words, a 30% energy benefit translates to a speed benefit of 14% (sqrt{1.3}-1), a 35% energy benefit translates to a speed benefit of 16%. This is in line with the numbers being reported (even though this doesn't take into account the psychological benefit).
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Old 09-08-04, 07:40 AM
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Originally Posted by tie
Note that at reasonable speeds, most energy is spent defeating air resistance, which increases quadratically with velocity. In other words, a 30% energy benefit translates to a speed benefit of 14% (sqrt{1.3}-1), a 35% energy benefit translates to a speed benefit of 16%. This is in line with the numbers being reported (even though this doesn't take into account the psychological benefit).
Duh.. yeah...what he said.
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Old 09-08-04, 11:06 AM
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Power required varies with the cube of the speed, so a 30% increase in effective power will result in about 10% increase in speed
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