How efficient are bikes?

Nick Atherley's a lumberjack and he's ok said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I am right though, anyone seen any sites that proves
that I am right?

TIA

Nick.

err the bike is very efficient, but the rider, hmmm thats a different story!

Nick Atherley said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I am right though, anyone seen any sites that proves
that I am right?

TIA

Nick.

I once heard that the most efficient form/use of energy is a man on a bike, or woman.....no idea if
it's true.

Peace, Bill The mind serves properly as a window glass rather than as a reflector, that is, the mind
should give an immediate view instead of an interpretation of the world.
:-]

Bill says:

Quoted message said:

I once heard that the most efficient form/use of energy is a man on a bike, or woman.....no idea if
it's true.

I don't know if a man on a woman is the most _efficient_ use of energy, but it sure is fun! ;->

Steve

Nick Atherley said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I am right though, anyone seen any sites that proves
that I am right?

Well, I figure it must be about 250% efficient. I run about 10mph, but bike about 25mph.

Mark Hickey Habanero Cycles habcycles.comhabcycles.comOpen ↗ Home of the $695 ti frame

I saw a study once. Once!.......dynamic power transfer from pedal to wheel is about %98-99
efficient. A rider can go ( roughly) 3 times further than on foot on the same amount of calories.
I.E for the math challenged like
me: 1 mi on foot about 250 calories = 3 mi on bike about 250 calories So I would say that a bike
increases the efficiency of locomotion by about %300. Up hill it decreases. Down hill it
increases exponetially

TJ takes off his dirty lab coat.

"Nick Atherley" <[email hidden]> wrote in message
"]news:[email hidden]...

Quoted message said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I am right though, anyone seen any sites that proves
that I am right?

TIA

Nick.

"Nick Atherley" <[email hidden]> wrote in message
news:<[email hidden]>...

Quoted message said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I am right though, anyone seen any sites that proves
that I am right?

It depends on who is riding it. Now if you have a lameo sidewalk rider like duhski, frightpig or
jpuddinhead, it's not efficient unless you count running over inocent pedestrians due to lack of
rudimentary bike handling skills.

JD

"JD" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

"Nick Atherley" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was in
the high 90% mark, he said no way. I am sure I

am

Quoted message said:

Quoted message said:

right though, anyone seen any sites that proves that I am right?

It depends on who is riding it. Now if you have a lameo sidewalk rider like duhski, frightpig or
jpuddinhead, it's not efficient unless you count running over inocent pedestrians due to lack of
rudimentary bike handling skills.

it's INNOCENT you stupid [censored]. And I wish you'd come stand on my sidewalk and let me give it a go
like you described....

Quoted message said:

JustaDICK

Quoted message said:

It depends on who is riding it. Now if you have a lameo sidewalk rider like duhski, frightpig or
jpuddinhead, it's not efficient unless you count running over inocent pedestrians due to lack of
rudimentary bike handling skills.

Quoted message said:

JD

I've heard that having a pony tail significantly reduces efficiency too.

"TJ" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I saw a study once. Once!.......dynamic power transfer from pedal to wheel is about %98-99
efficient. A rider can go ( roughly) 3 times further than on foot on the same amount of calories.
I.E for the math challenged like
me: 1 mi on foot about 250 calories = 3 mi on bike about 250 calories So

I

Quoted message said:

would say that a bike increases the efficiency of locomotion by about

%300.

Quoted message said:

Up hill it decreases. Down hill it increases exponetially

So let me get this right? If I can find a steep enough hill thereby increasing my locomotion
exponentially, I can travel at the speed of light? Or, (lowers voice to a quiet and awestruck tone)
Even... faster...????

Westie

(Stephen Baker) said:

Bill says:

Quoted message said:

I once heard that the most efficient form/use of energy is a man on a bike, or woman.....no idea
if it's true.

I don't know if a man on a woman is the most _efficient_ use of energy, but it sure is fun! ;->

And so is biking...

--
Øyvind Røtvold ._ @ darkside.noindex.htmlOpen ↗ / //\. ... sciare necesse est ... \>> | \\

Quoted message said:

Quoted message said:

It depends on who is riding it. Now if you have a lameo sidewalk rider like duhski, frightpig or
jpuddinhead, it's not efficient unless you count running over inocent pedestrians due to lack of
rudimentary bike handling skills.

it's INNOCENT you stupid [censored]. And I wish you'd come stand on my sidewalk and let me give it a go
like you described....

*ploink

"Doof" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

"JD" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

"Nick Atherley" <[email hidden]> wrote in message

news:<[email hidden]>...

Quoted message said:

Quoted message said:

I had an argument at work with a colleague today about the efficiency of bikes. I said it was
in the high 90% mark, he said no way. I am sure I

am

Quoted message said:

Quoted message said:

right though, anyone seen any sites that proves that I am right?

It depends on who is riding it. Now if you have a lameo sidewalk rider like duhski, frightpig or
jpuddinhead, it's not efficient unless you count running over inocent pedestrians due to lack of
rudimentary bike handling skills.

it's INNOCENT you stupid [censored].

That's a laugh, *you* correcting my grammar, doof.

Quoted message said:

And I wish you'd come stand on my sidewalk and let me give it a go like you > described....

Another cheap threat from a cheap [censored]. What a grand surprise! I might be scared if you hady any
bicycling skills, but the only way you could hit what you wanted to would be blind fool luck.

JD

if you happen to have a copy of scientific american handy from march 1973 that is there is a nice
article in there about bikes doesn't give a figure for efficiency. it just says "remarkably
efficient machine both structurally and mechanically" goes on to say that a man walking burns about
.75 calorie per gram per kilometre on a bike a man burns about .15 calorie per gram per kilometre
which make him the most efficient from of travel, it terms of energy consumed in moving a certain
distance as a function of body weight next best on the graph is salmon at .4 cal per g per km jet
about .6 cars about .8 and the poor old lemming about 40. l guess the jets and cars may have got a
little closer since 1973 but not much(mostly they just got bigger) hope this helps

Take it easy Ski I got a ponytail but it is braided.

Fire up MTB 03

TJ said:

I saw a study once. Once!.......dynamic power transfer from pedal to wheel is about %98-99
efficient. A rider can go ( roughly) 3 times further than on foot on the same amount of calories.
I.E for the math challenged like me: 1 mi on foot about 250 calories = 3 mi on bike about 250
calories

[censored], and here I was doing this for the weight loss potential.

gabrielle

Sure you could. You would probably have to remove any kind of friction as to not burn up. If the
pull of gravity is great enough you could transcend time.

"Westie" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

"TJ" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I saw a study once. Once!.......dynamic power transfer from pedal to

wheel

Quoted message said:

Quoted message said:

is about %98-99 efficient. A rider can go ( roughly) 3 times further

than

Quoted message said:

Quoted message said:

on foot on the same amount of calories. I.E for the math challenged

like

Quoted message said:

Quoted message said:

me: 1 mi on foot about 250 calories = 3 mi on bike about 250 calories

So

Quoted message said:

I

Quoted message said:

would say that a bike increases the efficiency of locomotion by about

%300.

Quoted message said:

Up hill it decreases. Down hill it increases exponetially

So let me get this right? If I can find a steep enough hill thereby increasing my locomotion
exponentially, I can travel at the speed of light? Or, (lowers voice to a quiet and awestruck
tone) Even... faster...????

Westie

Westie said:

"TJ" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I saw a study once. Once!.......dynamic power transfer from pedal to wheel is about %98-99
efficient. A rider can go ( roughly) 3 times further than on foot on the same amount of calories.
I.E for the math challenged like
me: 1 mi on foot about 250 calories = 3 mi on bike about 250 calories So

I

Quoted message said:

would say that a bike increases the efficiency of locomotion by about

%300.

Quoted message said:

Up hill it decreases. Down hill it increases exponetially

So let me get this right? If I can find a steep enough hill thereby increasing my locomotion
exponentially, I can travel at the speed of light? Or, (lowers voice to a quiet and awestruck
tone) Even... faster...????

Westie

As long as there's a black hole at the bottom, that should accelerate you nicely!

Jon "Commander" Bond

On Sat, 25 Jan 2003 08:56:23 -0800, gabrielle <[email hidden]> wrote:

.On Fri, 24 Jan 2003 20:30:34 -0800, TJ wrote: . .> I saw a study once. Once!.......dynamic power
transfer from pedal to .> wheel is about %98-99 efficient. A rider can go ( roughly) 3 times .>
further than on foot on the same amount of calories. I.E for the math .> challenged like me: 1 mi on
foot about 250 calories = 3 mi on bike .> about 250 calories

That only applies to road bikes. Mountain bikes have too much rolling resistance.
===
I am working on creating wildlife habitat that is off-limits to humans ("pure habitat"😉. Want to
help? (I spent the previous 8 years fighting auto dependence and road construction.)

home.pacbell.netmjvandeOpen ↗

"TJ" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

Sure you could. You would probably have to remove any kind of friction as to not burn up. If the
pull of gravity is great enough you could

transcend

Quoted message said:

time.

But, only on a JEEP mountain bike.