Changing chain question.
#1
Senior Member
Thread Starter
Join Date: May 2005
Posts: 696
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Changing chain question.
With the park tool chain checker, do you replace at .75 or 1. When does the wear start damaging cogs?
#2
How much does it weigh?
Join Date: Jul 2005
Location: Weight Weenie on a budget.
Posts: 3,427
Bikes: Lotus Fixed, Bianchi Virata 2004
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
At 1, you should change the chain, period. "Highly Recommended"
The chain will start damaging cogs around .7, actually. If you're at 1, take a look at the cogs + chainrings. You may need to change those very soon as well.
#4
Senior Member
Join Date: Sep 2005
Posts: 2,393
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
At .75, you should be changing the chain soon. "Recommended"
At 1, you should change the chain, period. "Highly Recommended"
Correct.
The chain will start damaging cogs around .7, actually.
Incorrect.
At 1, you should change the chain, period. "Highly Recommended"
Correct.
The chain will start damaging cogs around .7, actually.
Incorrect.
#5
Senior Member
Join Date: Feb 2008
Location: Montreal, Quebec, Canada
Posts: 100
Bikes: Cannondale Adventure 400 + Gazelle Medeo
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Last year, I let the chain on my girlfriend's stretch a bit beyond 1 and ended up having to replace the two smaller cogs.
Best,
Ron
__________________
Ronald (Ron) Houde
Living Life at 16km/hr, the ultimate Canada bike vacation
Seeing Less, Seeing Better, Living Happier
Cycling Vacation the Bike & Boat Way
Ronald (Ron) Houde
Living Life at 16km/hr, the ultimate Canada bike vacation
Seeing Less, Seeing Better, Living Happier
Cycling Vacation the Bike & Boat Way
#6
How much does it weigh?
Join Date: Jul 2005
Location: Weight Weenie on a budget.
Posts: 3,427
Bikes: Lotus Fixed, Bianchi Virata 2004
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
You're saying that the the cogs won't even be affected AT ALL until it's .75 ? As in, the very moment the chain would indicate a reading of .75, the cogs show the effects of damage, where as they wouldn't at .74... or .73.... ??
#7
Despite all my rage, I am
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 2,613
Bikes: LeMond Zurich, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#8
Senior Member
Join Date: Sep 2005
Posts: 2,393
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
You're the one who's suggesting something magical about the .7 reading, suggesting that a reading around .7 is where the cogs will start being "damaged." I'm simply stating that you are wrong about this.
Parts will wear as you ride them. Sure, the further your chain is worn, the more it may wear your cogs. But there is nothing special about passing the .7 mark, contrary to your claims. When you see the .75 reading, it's a good time to buy a new chain, but the world will not end (and your cassette will not self-destruct) if you ride another few hundred miles.
#9
How much does it weigh?
Join Date: Jul 2005
Location: Weight Weenie on a budget.
Posts: 3,427
Bikes: Lotus Fixed, Bianchi Virata 2004
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I agree - you're not saint, either.
Well, duh - no ****, Einstein. But, really, everything begins to get "damaged" the second it's used... hence the point of .7 ...or .6 or anything for that matter. I didn't say there's something "magical" about .7, but more referred to the idea that the cog is already being "damaged" before .75. Go back to the OP's question - he asked when the cogs get damaged. I stated it happens before .75, even though that's the lowest a measuring device will offer as a point of consideration. What number would you have picked? None at all? If I write "it gets damaged the instant you use it" that may have come off as sarcasm, even though it's true.
You're the one who's suggesting something magical about the .7 reading, suggesting that a reading around .7 is where the cogs will start being "damaged." I'm simply stating that you are wrong about this.
Parts will wear as you ride them. Sure, the further your chain is worn, the more it may wear your cogs. But there is nothing special about passing the .7 mark, contrary to your claims. When you see the .75 reading, it's a good time to buy a new chain, but the world will not end (and your cassette will not self-destruct) if you ride another few hundred miles.
Parts will wear as you ride them. Sure, the further your chain is worn, the more it may wear your cogs. But there is nothing special about passing the .7 mark, contrary to your claims. When you see the .75 reading, it's a good time to buy a new chain, but the world will not end (and your cassette will not self-destruct) if you ride another few hundred miles.
#10
Senior Member
Thread Starter
Join Date: May 2005
Posts: 696
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks for all the replies. After reading over everything, I have decided to change my chain every 150-250 miles to avoid unecessary wear to the cogs and rings.
#11
Senior Member
Join Date: Aug 2007
Location: BC
Posts: 167
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#12
Voice of the Industry
Join Date: May 2007
Posts: 12,572
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 1188 Post(s)
Likes: 0
Liked 8 Times
in
8 Posts
I typically change mine above .75% elongation.
PS: Cogs wear with mileage independent of chain elongation. Typically chainrings and many cassettes will go 10-15K miles without replacement.
#13
europoseur
Join Date: Aug 2007
Location: 310
Posts: 321
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Keep in mine that the type of riding you do has a lot to do with chain wear. Mashing up hills all day in the big ring puts a lot more stretch on a chain than high RPM riding on flats.
I use the .75 mark as a reference myself.