Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Cycling myths you don't believe anymore...

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Cycling myths you don't believe anymore...

Old 09-04-18, 05:16 PM
  #1  
Member
Thread Starter
 
Join Date: Apr 2008
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
Cycling myths you don't believe anymore...

#1 for me is "keeping your chain oiled will make it last longer". Don't misunderstand me, I still oil my chains frequently, but chains don't wear out, they stretch.
Case in point, I moved to a much hillier part of the state a few years ago and chains that used to last me 3000 miles barely last 1000 before they are stretched beyond what would be acceptable. At least 1/4" over the length of the chain. I only weigh 152lbs...
And don't get me started about those guys that claim they can tell the difference in the ride quality of two nearly identical tires. Sheesh...
TSUNAMIBAY is offline  
Old 09-04-18, 05:55 PM
  #2  
Farmer tan
 
f4rrest's Avatar
 
Join Date: May 2008
Location: Burbank, CA
Posts: 7,985

Bikes: Allez, SuperSix Evo

Liked 28 Times in 23 Posts
um, chains don't actually stretch.
f4rrest is offline  
Old 09-04-18, 06:08 PM
  #3  
Senior Member
 
bobwysiwyg's Avatar
 
Join Date: Jan 2016
Location: 961' 42.28° N, 83.78° W (A2)
Posts: 2,344

Bikes: Mongoose Selous, Trek DS

Liked 319 Times in 189 Posts
Originally Posted by Jakedatc
.. but it's the same mis-naming as cable stretch (which also don't stretch)
Sorry disagree on this one, cables do stretch..
"Two kinds of stretch occur in cable based on wire rope: constructional stretch and elastic stretch. This stretch is due to two different causes. ... Elastic Stretch - Elasticstretch is the actual elongation of the wires of a strand or a cable. This is caused by the application of a load up to the yield point of the metal."
bobwysiwyg is offline  
Old 09-04-18, 06:12 PM
  #4  
Senior Member
 
Join Date: Nov 2015
Location: Music City, USA
Posts: 4,444

Bikes: bikes

Liked 1,429 Times in 711 Posts
Originally Posted by TSUNAMIBAY
#1 for me is "keeping your chain oiled will make it last longer". Don't misunderstand me, I still oil my chains frequently, but chains don't wear out, they stretch..
Well, no. .
rubiksoval is offline  
Old 09-04-18, 06:13 PM
  #5  
Senior Member
 
Join Date: Nov 2015
Location: Music City, USA
Posts: 4,444

Bikes: bikes

Liked 1,429 Times in 711 Posts
Originally Posted by Jakedatc
they call it stretch but it's the same mis-naming as cable stretch (which also don't stretch)
Wow, this thread is full of fail.

Cycling myths: people starting threads on BF actually know what they're talking about.
rubiksoval is offline  
Old 09-04-18, 06:24 PM
  #6  
Coffin Dodger
 
Pirkaus's Avatar
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 2,138

Bikes: Motobecane Vent Noir, Lynskey R345, Serotta Nova Special X

Liked 292 Times in 143 Posts
So does this mean cassettes don't wear?
Pirkaus is offline  
Old 09-04-18, 06:25 PM
  #7  
Member
Thread Starter
 
Join Date: Apr 2008
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
The old chain laid on a table next to a brand new chain. Old chain is at least 1/4" longer. If that isn't stretch, what is it? Reverse shrinkage?
Anyway, I worked in the metal forming industry for thirty years, so a chain stretching after routinely having force applied to it didn't surprise me.
TSUNAMIBAY is offline  
Old 09-04-18, 06:29 PM
  #8  
Coffin Dodger
 
Pirkaus's Avatar
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 2,138

Bikes: Motobecane Vent Noir, Lynskey R345, Serotta Nova Special X

Liked 292 Times in 143 Posts
Originally Posted by TSUNAMIBAY
The old chain laid on a table next to a brand new chain. Old chain is at least 1/4" longer. If that isn't stretch, what is it? Reverse shrinkage?
Anyway, I worked in the metal forming industry for thirty years, so a chain stretching after routinely having force applied to it didn't surprise me.
https://www.bikeradar.com/us/road/ge...plained-46015/
Pirkaus is offline  
Old 09-04-18, 06:34 PM
  #9  
Senior Member
 
Join Date: Sep 2017
Location: Center of Central CA
Posts: 1,581
Likes: 0
Liked 9 Times in 8 Posts
Honestly, how many of us here have "snapped a chain under power"?

Not me. I really don't see how that could even happen, because of all the redundancy built into a bike chain. Both sides of the chain fail at once? Sure, it's possible, but how common?
Colnago Mixte is offline  
Old 09-04-18, 06:34 PM
  #10  
Senior Member
 
noodle soup's Avatar
 
Join Date: Nov 2015
Posts: 8,924
Liked 1,882 Times in 998 Posts
Originally Posted by TSUNAMIBAY
The old chain laid on a table next to a brand new chain. Old chain is at least 1/4" longer. If that isn't stretch, what is it? Reverse shrinkage?
The metal didn't stretch.

"Chain wear is commonly referred to as ‘chain stretch’, because the chain’s pitch grows in length as it wears. This is the most important type of chain wear, and the growth comes from the bushings wearing with the chain pins."
noodle soup is offline  
Old 09-04-18, 06:38 PM
  #11  
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Liked 1,731 Times in 958 Posts
Stopping by just to see where this thing goes, because it's off to a phenomenal start. I'm bordering on excited.
__________________
DrIsotope is offline  
Old 09-04-18, 06:38 PM
  #12  
Member
Thread Starter
 
Join Date: Apr 2008
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by noodle soup
The metal didn't stretch.

"the growth comes from the bushings wearing with the chain pins."
Bushing wear would not account for the increased chain length.
TSUNAMIBAY is offline  
Old 09-04-18, 06:40 PM
  #13  
Senior Member
 
Spoonrobot's Avatar
 
Join Date: Jul 2006
Posts: 3,118
Liked 234 Times in 131 Posts
I have extreme secondhand embarrassment from this thread. The chain thing was bad enough and then I saw the tire comment too

Does no one read Sheldon Brown anymore?

Your chain didn't stretch like a piece of elastic. The rollers and pins wore and that allowed the spacing to increase. It happened faster because the load increases during climbing as well as during higher power efforts.

pardo.net/bike/pic/fail-004/000.html
Spoonrobot is offline  
Old 09-04-18, 06:40 PM
  #14  
Member
Thread Starter
 
Join Date: Apr 2008
Posts: 39
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by DrIsotope
Stopping by just to see where this thing goes, because it's off to a phenomenal start. I'm bordering on excited.
Yes, me too. People ignoring obvious evidence and simple physics is fascinating...
TSUNAMIBAY is offline  
Old 09-04-18, 06:40 PM
  #15  
Senior Member
 
noodle soup's Avatar
 
Join Date: Nov 2015
Posts: 8,924
Liked 1,882 Times in 998 Posts
Originally Posted by f4rrest
um, chains don't actually stretch.
Neither do derailleurs, but don't try to explain that to cat0020.
noodle soup is offline  
Old 09-04-18, 06:41 PM
  #16  
Senior Member
 
Spoonrobot's Avatar
 
Join Date: Jul 2006
Posts: 3,118
Liked 234 Times in 131 Posts
Appeal to authority fallacy!

Pull apart a link and mic the pins and see how much steel they've lost. You can see it clearly but measuring it is great too. Or clean your chain in a bucket of suds and then drop a magnet in the bottom to get an even better view of why the chain is longer.
Spoonrobot is offline  
Old 09-04-18, 06:42 PM
  #17  
Senior Member
 
Join Date: Dec 2012
Posts: 1,163
Likes: 0
Liked 20 Times in 18 Posts
Originally Posted by TSUNAMIBAY
#1 for me is "keeping your chain oiled will make it last longer". Don't misunderstand me, I still oil my chains frequently, but chains don't wear out, they stretch.
Case in point, I moved to a much hillier part of the state a few years ago and chains that used to last me 3000 miles barely last 1000 before they are stretched beyond what would be acceptable. At least 1/4" over the length of the chain. I only weigh 152lbs...
And don't get me started about those guys that claim they can tell the difference in the ride quality of two nearly identical tires. Sheesh...
I see you still have much to learn Grasshopper.
cycledogg is offline  
Old 09-04-18, 06:47 PM
  #18  
Duke Ulysses
 
Join Date: Jul 2013
Location: Southern California
Posts: 800

Bikes: An old orange one for dirt, and for the other stuff: a white one, a kinda mint green one, and a black one.

Liked 175 Times in 86 Posts
The blood of the innocent.

growlerdinky is offline  
Old 09-04-18, 06:49 PM
  #19  
Senior Member
 
noodle soup's Avatar
 
Join Date: Nov 2015
Posts: 8,924
Liked 1,882 Times in 998 Posts
Originally Posted by TSUNAMIBAY
Bushing wear would not account for the increased chain length.
Bushing/roller and pin wear, account for the increased chain length. The inner and outer plates of the chain, stay the same length.
noodle soup is offline  
Old 09-04-18, 07:07 PM
  #20  
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 15,901

Bikes: 2015 Workswell 066, 2017 Workswell 093, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Liked 3,876 Times in 2,030 Posts
I did break a chain under power a few months ago (all the more remarkable because I generate so little power.) The rider i was with carried a pretty comprehensive tool kit in his jersey pocket, including a chain-wear checker. he measured and told me my chain had stretched.

Between us we have about eight decades iof riding. he likes to do 100-mile rides on the weekends, so how many miles between us ... pointless to count.

Both of us Know a chain Wears, it does not "stretch."

But because we wanted to cooperate and communicate rather than wave our e-peens ....
Maelochs is offline  
Old 09-04-18, 07:34 PM
  #21  
Senior Member
 
tagaproject6's Avatar
 
Join Date: Aug 2009
Posts: 8,550

Bikes: Wilier Izoard XP (Record);Cinelli Xperience (Force);Specialized Allez (Rival);Bianchi Via Nirone 7 (Centaur); Colnago AC-R Disc;Colnago V1r Limited Edition;De Rosa King 3 Limited(Force 22);DeRosa Merak(Red):Pinarello Dogma 65.1 Hydro(Di2)

Liked 278 Times in 146 Posts
Woohoo, yeah!!!
tagaproject6 is offline  
Old 09-04-18, 08:11 PM
  #22  
Arizona Dessert
 
noisebeam's Avatar
 
Join Date: Jun 2004
Location: AZ
Posts: 15,029

Bikes: Cannondale SuperSix, Lemond Poprad. Retired: Jamis Sputnik, Centurion LeMans Fixed, Diamond Back ascent ex

Liked 2,169 Times in 1,288 Posts
Correct. Chains do not wear or stretch - that is an illusion. What is really happening is that both the chain and seat stays lengthen - more so under load and heavy use.
noisebeam is offline  
Old 09-04-18, 08:24 PM
  #23  
Heft On Wheels
 
sdmc530's Avatar
 
Join Date: Nov 2014
Location: South Dakota
Posts: 3,123

Bikes: Specialized,Cannondale,Argon 18

Liked 560 Times in 346 Posts
Originally Posted by Colnago Mixte
Honestly, how many of us here have "snapped a chain under power"?
i used to think the same thing then last fall on a climb I was really pounding it out and I broke a chain. It hurt a lot! It was an older chain and it failed at a roller. I think it was damaged though but still after my “area” healed I know brag that I had so much power I broke a chain. I doubt it was my power......I

Originally Posted by DrIsotope
Stopping by just to see where this thing goes, because it's off to a phenomenal start. I'm bordering on excited.
Same here this should be a good one lol
sdmc530 is offline  
Old 09-04-18, 08:30 PM
  #24  
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Liked 1,731 Times in 958 Posts
Postulate: chain wear/stretch is directly proportionate to the amount of time spent slamdancing on the pedals. Discuss.
__________________
DrIsotope is offline  
Old 09-04-18, 09:01 PM
  #25  
Arizona Dessert
 
noisebeam's Avatar
 
Join Date: Jun 2004
Location: AZ
Posts: 15,029

Bikes: Cannondale SuperSix, Lemond Poprad. Retired: Jamis Sputnik, Centurion LeMans Fixed, Diamond Back ascent ex

Liked 2,169 Times in 1,288 Posts
Slamdancing in the rain on a dirty floor even more so.
noisebeam is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.