a pound off the wheels = two off the bike?

[Shebeen]

Getting bored of the powerbalance debates, time for some real physics.

 

I love this whole thing about lightwieght wheels accelerating notably faster. Its really good marketing.

So i went cycling up a hill. timed it

came down, and swapped to my lighter wheelset and put the extra equivalent weight in my waterbottle.

 

My time on the lighter wheelset was eye dentical.

 

I know you reckon i might have been more tired the second time. but as a control i drank a double red bull before both attempts so i would be producing maximum possible effort.

 

 

 

if you want to go and see the hill I'm riding, click here:

Edited December 1, 2010 by SteveCT

[Face Plant]

did you time yourself on the downhill?

[JasonW]

Should make no difference where you take the weight off including yourself, coz everything has to accelerate or be kept in motion at the same rate.

[The Saint]

e=mc2

[Bman]

dude how much free time do you have? very interesting though!!

[Bman]

Should make no difference where you take the weight off including yourself, coz everything has to accelerate or be kept in motion at the same rate.

would def agree

[bikemonster]

Should make no difference where you take the weight off including yourself, coz everything has to accelerate or be kept in motion at the same rate.

 

Bah!

 

Deleted my sarky comment 'cause I hadn't read your comment properly.

Edited December 1, 2010 by bikemonster

[Spinnekop]

Ping oom Johan Bornman........

 

Popcorn, waffles, strap in.

[Danger Dassie]

Hier kom 'n ding!!

 

"Looks like we got ourselves a bilingual bloodfest" - Anchorman

[BigToe]

Getting bored of the powerbalance debates, time for some real physics.

 

I love this whole thing about lightwieght wheels accelerating notably faster. Its really good marketing.

So i went cycling up a hill. timed it

came down, and swapped to my lighter wheelset and put the extra equivalent weight in my waterbottle.

 

My time on the lighter wheelset was eye dentical.

 

I know you reckon i might have been more tired the second time. but as a control i drank a double red bull before both attempts so i would be producing maximum possible effort.

 

 

 

if you want to go and see the hill I'm riding, click here:

 

Sounds verrrrry scientific and your methodology seems sound...

[Starry nights]

Cool stuff - however, a proper experimental set-up would include 20-30+ repetitions of each treatment - and done blindly if possible (probably not). Then you can do a standard t-test to determine if any significant difference between the the means of the two. A once off ride for each treatment won’t sell as science

[RodTi]

I'd only be remotely interested in this, if video evidence could be displayed involving a test rider who was female, and naked (so as to discount any wind resistance issues pertaining to cycling attire).

[DMD 1]

I'd only be remotely interested in this, if video evidence could be displayed involving a test rider who was female, and naked (so as to discount any wind resistance issues pertaining to cycling attire).

 

This get my vote. Were do we make a donation for the funding.

Edited December 1, 2010 by DMD 1

[Fleming]

I would like to see this test done again but instead of going up a fairly long hill, rather do say a 100m sprint from a low speed.

 

SteveCT said it himself in his initial post, the lighter wheels accelerate quicker. Once you are up to speed it shouldnt matter where the weight is on the bike, especially going up a hill where your speed should be relatively low.

[the pooks]

As said before, the test would require many repetitions and be done "blind". In the cycling scene having good kit must have a huge positive psychological influence on outcomes, and as we are humans and not machines, this influence becomes significant.

 

I like the idea of a naked female tester - that would make it a lot more interesting1

[Bennie Dikwiel]

Once you are up to speed it shouldnt matter where the weight is on the bike, especially going up a hill where your speed should be relatively low.

 

Just to toss a spanner in the works, if you are riding a rolling hill type profile with short elivation periods, would it not be better to have heavy wheels? - Imagine the flywheel effect with mercury filled tubes!