General Discussion Triathlon Talk » Watts are watts, change that chain Rss Feed  
Moderators: jmk-brooklyn, Ron Reply
2013-10-04 1:14 PM

User image

Pro
5564
50005002525
Melbourne FL
Gold member
Subject: Watts are watts, change that chain

Just read an Inside Triathlon article and reviewed the Friction Facts chart on chain stretch losses vs. a new chain. At 250W a 0.5% stretched chain loss was 1.0W vs. new chain, 1.5W for a chain at 0.75% vs. new, and 2.0W a chain at 1.0% vs. new.

I recently bought a simple park chain stretch tool and my chain was well past the 0.75 limit.  Guess I left some seconds out there in my last sprint tri!



2013-10-04 1:20 PM
in reply to: Donto

User image

Expert
1854
10005001001001002525
2011 Scion xB
Subject: RE: Watts are watts, change that chain
It's minimal but it adds up, especially the longer you go (IM). My friend is the most Type-A person I have ever met in my life and it serves him well. He has a separate chain, chainrings, cassette, and locking that he puts on before he races, and he uses a special coat from a producer to save wattage as well. Not many have the time for such details but he races professionally (used to be on this board) and he can pay attention to such great detail.
2013-10-04 1:28 PM
in reply to: Donto

User image


437
10010010010025
Subject: RE: Watts are watts, change that chain
It's also murder on your cassette to have a stretched chain.
2013-10-04 1:43 PM
in reply to: happyscientist

User image

Pro
5564
50005002525
Melbourne FL
Gold member
Subject: RE: Watts are watts, change that chain
Originally posted by happyscientist It's also murder on your cassette to have a stretched chain.
A severely stretched chain!  I recently read on one site that changing the chain at 0.5% you should easily go 4-5 chain changes for the cassette life.  At 0.75% it was like 2-3 chain changes for the cassette life. Like I said I'm well past 0.75%, probably closer to 1.5% and everything shifts fine, until I change the chain then its cha-chingMoney mouth time!!
2013-10-04 2:30 PM
in reply to: Donto

User image

Pro
5091
5000252525
Subject: RE: Watts are watts, change that chain

There's more than a handful of watts difference even between which kind of lubrication you use.  Let alone a dirty change vs a clean and well oiled one.  

I always clean and lube my chain for races.  if nothing else- it looks good and is quieter.  

New Thread
General Discussion Triathlon Talk » Watts are watts, change that chain Rss Feed  
RELATED POSTS

A Watt is a Watt - Power Training vs Heart Rate Training

Started by RobertFontaine
Views: 1591 Posts: 22

2013-03-14 10:33 PM golfer17

Does Watts while running mean anything or relate to bike watts?

Started by peto_primo
Views: 3002 Posts: 6

2011-05-19 10:56 PM RChung

Watts indoors vs watts outdoors

Started by jmot
Views: 1002 Posts: 23

2011-03-24 9:28 PM jgerbodegrant

A watt is a watt is a watt......right?

Started by aquagirl
Views: 1350 Posts: 24

2010-10-02 8:58 AM marcag

Watts

Started by corndogcaun
Views: 330 Posts: 9

2006-07-29 10:18 AM Steve in IL
RELATED ARTICLES
date : March 2, 2009
author : FitWerx
comments : 5
Dirty bike chain? Have you ever thought about cleaning it? We cover the basics of how to clean your bike chain and the use of different cleaners, degreasers and lubricants.
 
date : November 5, 2008
author : FitWerx
comments : 0
How often should you have a bike tune up and what should be included? Is it unreasonable to expect a refitting as part of the tune up?
date : May 5, 2008
author : TriPainter
comments : 0
I went into the pool area (as this was a pool swim) and got body marked. That's when it hit me that I was there to race - this was not a clinic.
 
date : May 5, 2008
author : mrakes1
comments : 0
Did you flat training or racing on your tubular tire? This video will show you everything you need to do to change your tubular tire.
date : December 3, 2007
author : CPT
comments : 4
Colorado Premier Training goes over the basics of what bike power training is and how it relates to your optimal bike position.
 
date : November 6, 2007
author : Ron
comments : 2
Don't know how to take that rear wheel off of your bike? Is the chain making things difficult? Learn how to remove your rear wheel if you have to change your bike tire or fix a flat.
date : April 17, 2005
author : Daniel Clout
comments : 5
I was humbled last year. My body shut down on me just before two World Championship events. I was originally in top form to medal in both, but my strength was sapped from me.
 
date : August 31, 2004
author : malvey
comments : 0
The journey begins in the brain. The brain, which energizes your attitude, is the most powerful factor in a lifestyle overhaul.