Kgs = Watts

open topic, for anything cycling related.

Kgs = Watts

Postby nailsaslegs » Mon Aug 26, 2013 7:00 pm

Not sure which forum to stick this in, Health, Training, whatever so here it is. Somewhere I read an article about Kgs=Watts. Such as 5kgs = 10 watts or something like that. It was a good article and showed how losing Kgs would increase your power to weight ratio etc. Wondering if anyone has a link to that same article or similar?

Cheers
nailsaslegs
 
Posts: 148
Joined: Wed Jul 03, 2013 11:17 am

by BNA » Mon Aug 26, 2013 7:09 pm

BNA
 

Re: Kgs = Watts

Postby bigfriendlyvegan » Mon Aug 26, 2013 7:09 pm

Yes, I can confirm. I am fat and powerful.

Actually, just fat.
User avatar
bigfriendlyvegan
 
Posts: 2889
Joined: Tue Apr 01, 2008 1:18 pm
Location: Denistone, NSW

Re: Kgs = Watts

Postby clackers » Mon Aug 26, 2013 7:18 pm

User avatar
clackers
 
Posts: 1732
Joined: Mon May 16, 2011 10:48 am
Location: Melbourne

Re: Kgs = Watts

Postby human909 » Mon Aug 26, 2013 7:22 pm

http://bikecalculator.com/

At 30kph, 0% grade and 70kg then adding 10kg makes 5W difference.
human909
 
Posts: 4192
Joined: Tue Dec 01, 2009 10:48 am

Re: Kgs = Watts

Postby toolonglegs » Mon Aug 26, 2013 7:27 pm

It is simple... get as skinny as you can while making the most power you possibly can.
It what ranges you make the most watts per kilo will determine roughly what type of rider you will be.
Although that little Russian who thought he could force me off my line yesterday quickly realized that 65kgs against 90kgs is bad odds :P
Image
User avatar
toolonglegs
 
Posts: 14029
Joined: Fri Jun 29, 2007 7:49 pm
Location: Somewhere with padded walls and really big hills!

Re: Kgs = Watts

Postby clackers » Mon Aug 26, 2013 7:48 pm

As H909 points out, weight pretty much doesn't matter on the flat (that's all about power vs aero shape), so Fabian Cancellara can be world time trial champion but can never win a Grand Tour.
User avatar
clackers
 
Posts: 1732
Joined: Mon May 16, 2011 10:48 am
Location: Melbourne

Re: Kgs = Watts

Postby toolonglegs » Mon Aug 26, 2013 7:57 pm

clackers wrote:As H909 points out, weight pretty much doesn't matter on the flat (that's all about power vs aero shape), so Fabian Cancellara can be world time trial champion but can never win a Grand Tour.

People would have said the same about Wiggins when he was winning golds on the track.
Image
User avatar
toolonglegs
 
Posts: 14029
Joined: Fri Jun 29, 2007 7:49 pm
Location: Somewhere with padded walls and really big hills!

Re: Kgs = Watts

Postby Bah77 » Mon Aug 26, 2013 8:41 pm

https://www.youtube.com/watch?v=5DRQwKREgvI

I saw this a while ago, lighter bike vs lighter body, shows differences between power used for extra weight.
Bah77
 
Posts: 114
Joined: Fri Mar 15, 2013 10:51 pm

Re: Kgs = Watts

Postby joomz » Mon Aug 26, 2013 8:41 pm

And now Wiggins is tipping the scales in the other direction again, trying to put on 8kg before the world tt championships
http://m.cyclingnews.com/news/wiggins-b ... -trial-bid
Interesting game
joomz
 
Posts: 97
Joined: Wed Nov 09, 2011 7:07 am

Re: Kgs = Watts

Postby clackers » Mon Aug 26, 2013 8:47 pm

toolonglegs wrote:People would have said the same about Wiggins when he was winning golds on the track.


Yep.

Ferrari used to bully his charges into losing weight.
User avatar
clackers
 
Posts: 1732
Joined: Mon May 16, 2011 10:48 am
Location: Melbourne

Re: Kgs = Watts

Postby gorilla monsoon » Tue Aug 27, 2013 12:07 pm

clackers wrote:
toolonglegs wrote:People would have said the same about Wiggins when he was winning golds on the track.


Yep.

Ferrari used to bully his charges into losing weight.


But Colin Chapman made his cars as light as possible. Go figure.
Some days you are a big, strutting rooster, some days you are a bit chicken and some days you are just a complete cocque. Roger Ramjet: 2009 Giant CRX3 Spockette: 2009 Trek FX 7.3 (WSD, property of Mrs Monsoon) Lady Penelope: 2011 Avanti Cadent 1.0 TdF
User avatar
gorilla monsoon
 
Posts: 2663
Joined: Tue Aug 26, 2008 10:45 am
Location: Central Coast/Lake Macquarie

Re: Kgs = Watts

Postby Xplora » Tue Aug 27, 2013 12:30 pm

I don't think it's worth bothering about working out your lost watts due to weight; the answer is plainly "lose as much as you can, always" while being able to push the pedals hard. You don't eat enough, you can't push pedals. Simple. Even a flat race is often subject to some minor inclines, and your weight works against you much harder than it works for you. Many guys pick a higher gear to spin down the hill. You don't quite have the same effortless luxury trying to go back up.

Most people asking the question usually have a lot of weight to lose. I'm 71 at 187cm?? Something like that. I have some weight to lose but I don't think it's wise to do it. Better to put on muscle bulk to increase the top power, than try to improve watts/kg because I have room to move with muscular strength. Thing is, if you jump at the right time, no one can keep up anyway. Play doggo at all times ;)
Xplora
 
Posts: 4668
Joined: Fri Dec 10, 2010 11:33 pm

Re: Kgs = Watts

Postby clackers » Tue Aug 27, 2013 12:50 pm

gorilla monsoon wrote:
clackers wrote:
toolonglegs wrote:People would have said the same about Wiggins when he was winning golds on the track.


Yep.

Ferrari used to bully his charges into losing weight.


But Colin Chapman made his cars as light as possible. Go figure.


By 'charges' I meant Valiant Chargers, of course, GM.
User avatar
clackers
 
Posts: 1732
Joined: Mon May 16, 2011 10:48 am
Location: Melbourne

Re: Kgs = Watts

Postby jules21 » Tue Aug 27, 2013 1:47 pm

losing weight helps on hilly courses. on flat courses, you aren't doing much work to push the weight and you will benefit from the additional power which tends to be available from greater muscle mass. if the increased weight is a beer gut, you're probably not fit enough to ride quickly anyway.
Image
User avatar
jules21
 
Posts: 8376
Joined: Thu Apr 02, 2009 10:14 pm
Location: somewhere out in the melbourne rain

Re: Kgs = Watts

Postby Ross » Tue Aug 27, 2013 3:15 pm

Some interesting reading about Jens Voigt's wattage output during his breakaway in the recent USA Pro Challenge. According to Wikipedia he weighs 76kg

http://velonews.competitor.com/2013/08/ ... ack_300075
Image
User avatar
Ross
 
Posts: 3383
Joined: Sat Nov 07, 2009 7:53 pm

Re: Kgs = Watts

Postby toolonglegs » Tue Aug 27, 2013 4:22 pm

Ross wrote:Some interesting reading about Jens Voigt's wattage output during his breakaway in the recent USA Pro Challenge. According to Wikipedia he weighs 76kg

http://velonews.competitor.com/2013/08/ ... ack_300075

The numbers aren't that impressive until you take in to account the altitude they were racing at. A mate of mine that trains often in Utah said he loses 10-20% on about the 2nd day he arrives there from sea level.
Image
User avatar
toolonglegs
 
Posts: 14029
Joined: Fri Jun 29, 2007 7:49 pm
Location: Somewhere with padded walls and really big hills!


Return to General discussion

Who is online

Users browsing this forum: a, jules21, thecaptn



Support BNA
Click for online shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Cycling Express Cycling Express
Ebay Ebay AU
ProBikeKit ProBikeKit UK
Evans Cycles Evans Cycles UK
JensonUSA Jenson USA
JensonUSA Competitive Cyclist