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is there a rider weight vs. bike weight ratio?

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is there a rider weight vs. bike weight ratio?

Old 05-03-07, 10:30 AM
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is there a rider weight vs. bike weight ratio?

i remember reading something here a while ago, about how one pound of bike weight is equivalent to several pounds of body weight, and i was just wondering if there is a ratio? and if so, what is it?

for example, is dropping 1 pound of bike weight equivalent to the rider losing say xXx pounds?
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Old 05-03-07, 10:35 AM
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Unless its from the wheels, a pound is a pound. Even from the wheels, it's just a little bit easier to accelerate, and nothing more.

Whoever told you that is misinformed on a little thing called physics. You still have to accelerate and lift the entire system when climbing.
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Old 05-03-07, 10:59 AM
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Well there should be! Something like the thoroughbred handicapping system. The jock too light? Add some lead!
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Old 05-03-07, 11:05 AM
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Originally Posted by Duke of Kent
Unless its from the wheels, a pound is a pound. Even from the wheels, it's just a little bit easier to accelerate, and nothing more.

Whoever told you that is misinformed on a little thing called physics. You still have to accelerate and lift the entire system when climbing.
Regardless, after swapping my 20.5 steel bike for a 15.6 lb CF model this year I would disagree vehemently, especially when rocking the bike back and forth over flat to rolling terrain. I climb better on the CF despite the fact I am actually 15 lbs heavier than when I had the steel bike.

Bikes are not only ridden uphill and somehow a 180 lb person carrying a 40 lb rucksack doesn't quite seem the same as a 200 lb person carrying a 20 lb rucksack...to make an intentionally overly extreme example.
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Old 05-03-07, 11:27 AM
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Originally Posted by Dial_tone
Regardless, after swapping my 20.5 steel bike for a 15.6 lb CF model this year I would disagree vehemently, especially when rocking the bike back and forth over flat to rolling terrain. I climb better on the CF despite the fact I am actually 15 lbs heavier than when I had the steel bike.
I'd rather have a heavier bike that helps me be slimmer. So skinny guy on a fat bike or fat guy on a skinny bike We can't win.

PS: I've been riding the mountain bike just to get the pump
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Old 05-03-07, 11:47 AM
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Originally Posted by Dial_tone
Regardless, after swapping my 20.5 steel bike for a 15.6 lb CF model this year I would disagree vehemently, especially when rocking the bike back and forth over flat to rolling terrain. I climb better on the CF despite the fact I am actually 15 lbs heavier than when I had the steel bike.

Bikes are not only ridden uphill and somehow a 180 lb person carrying a 40 lb rucksack doesn't quite seem the same as a 200 lb person carrying a 20 lb rucksack...to make an intentionally overly extreme example.
Maybe you just got faster?
My bike weighs a little over 24 lbs, probably more than that after the seat pack and tool and stuff.

My bike feels fat
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Old 05-03-07, 12:22 PM
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Yes, dropping 1 pound from the bike = $1000, dropping one pound from you saves you money on food.
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Old 05-03-07, 01:31 PM
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Originally Posted by Dial_tone
Regardless, after swapping my 20.5 steel bike for a 15.6 lb CF model this year I would disagree vehemently, especially when rocking the bike back and forth over flat to rolling terrain. I climb better on the CF despite the fact I am actually 15 lbs heavier than when I had the steel bike.

Bikes are not only ridden uphill and somehow a 180 lb person carrying a 40 lb rucksack doesn't quite seem the same as a 200 lb person carrying a 20 lb rucksack...to make an intentionally overly extreme example.
I wonder how much fit and ergonomics play a role in how much effort it seems to take to make one bike move a certain speed under certain conditions over another bike. You know, versus weight, chainline etc.

I felt a big difference between the two steelies I owned most recently (in series)...the weight difference was about 1 pound! I know the bike I have now is the best fit in terms of everything - ST/TT/saddle (type, position)/handlebar position. It seems to make the difference, with an emphasis on "seems".
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Old 05-03-07, 01:36 PM
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if you're looking for a reason to upgrade your bike, it's okay, just do it.

Those that don't mind that their bikes are heavy are lying. They really want a nice featherweight CF bike. don't lie!
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Old 05-03-07, 01:51 PM
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So there is no need to stuff your water bottles in your jersey pockets for the climbs? Damn....now you tell me.
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Old 05-03-07, 02:01 PM
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Originally Posted by vpiuva
Yes, dropping 1 pound from the bike = $1000, dropping one pound from you saves you money on food.
That is the best response I have seen in days.
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Old 05-03-07, 02:02 PM
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As far as shedding weight, I remember reading somewhere that losing 6 lbs of body weight is equivalent to lightening your bike by one pound. But I think performance wise, losing the body weight would be far more beneficial......up to a point, that is...
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Old 05-03-07, 03:20 PM
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well think of it this way, every pound of body weight is another pound that can be thrown on the pedals if need be. every bike pound, well, its just there.
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Old 05-03-07, 03:31 PM
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Originally Posted by battery guy
Those that don't mind that their bikes are heavy are lying. They really want a nice featherweight CF bike. don't lie!
I don't think my bike is heavy (~22 lbs with pedals and water bottles), but I wouldn't mind having a dedicated "race bike" as well, in full CFRP. However, if I only have space for one bike, and I also want one that I can handle a bit rough (wrt scratches and such), then a CFRP bike is out of the question.
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Old 05-03-07, 03:41 PM
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Meh. My bike's just over 19 lbs and I'm doing fine. I wouldn't mind it being a little lighter, but it's not worth the money. Of course I could have chosen a lighter frame for the same money, but then I wouldn't have that chip to carry around on my shoulder
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Old 05-03-07, 04:29 PM
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My bike is 32 lbs. I'm 195 lbs. I'm hoping to lose another 30 lbs. Until then, I don't see a good reason to buy a bike in the ~20lbs range. My last ride ranged between 760 ft to 1100 ft in elevation (rolling hills), so it's not like I'm climbing mountains anyway.
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Old 05-04-07, 03:14 PM
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My bike's under 18, and it sures feels good going up hills! Maybe that's subjective, but it works....

On the rider weight issue, it's worth keeping in mind that there's a big difference between carrying an extra 10 pounds of fat and an extra 10 pounds of muscle...the fat is just weight you need to drag along. The muscle might actual help with the dragging. Well, at least whatever portion of it was in your legs....
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Old 05-04-07, 03:32 PM
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Originally Posted by vpiuva
Yes, dropping 1 pound from the bike = $1000, dropping one pound from you saves you money on food.
Nicely done.

... Brad
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Old 05-04-07, 05:37 PM
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i used to have a huffy.

my rider to bike weight ratio was about 1
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