Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Are these chain rings worn out?

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Are these chain rings worn out?

Old 04-22-18, 06:07 PM
  #1  
ppg677
Senior Member
Thread Starter
 
Join Date: Feb 2012
Location: Madison, WI
Posts: 648

Bikes: 1982 Trek 957 (retro), 70s Gios Torino, 80s Trek 710 (retro), 1995 Trek 930 MTB (singlespeed), Surly LHT

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Are these chain rings worn out?

Seems like wear to me, but I'm not really sure.
Attached Images
File Type: jpg
IMG_20180422_173007-1512x2016.jpg (851.4 KB, 209 views)
File Type: jpg
IMG_20180422_173028-1512x2016.jpg (701.8 KB, 208 views)
ppg677 is offline  
Old 04-22-18, 06:28 PM
  #2  
Drillium Dude 
Gone riding
 
Drillium Dude's Avatar
 
Join Date: Jul 2009
Posts: 10,808
Mentioned: 211 Post(s)
Tagged: 0 Thread(s)
Quoted: 1781 Post(s)
Liked 1,691 Times in 698 Posts
Put it this way: if those were mine, I'd retire them. Lots of sharkiness, and a few have been partially chipped off.

DD
__________________
My Flickr pics: https://www.flickr.com/photos/30331021@N08/

Drillium Dude is offline  
Old 04-22-18, 06:30 PM
  #3  
TenGrainBread 
Senior Member
 
TenGrainBread's Avatar
 
Join Date: Sep 2015
Location: Madison, WI
Posts: 2,589

Bikes: Cherubim, Alps, a few Schwinns

Mentioned: 52 Post(s)
Tagged: 0 Thread(s)
Quoted: 1071 Post(s)
Liked 395 Times in 253 Posts
Yes, they are worn.
TenGrainBread is offline  
Old 04-22-18, 09:42 PM
  #4  
ThermionicScott 
working on my sandal tan
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Posts: 20,291

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)

Mentioned: 88 Post(s)
Tagged: 0 Thread(s)
Quoted: 2847 Post(s)
Liked 842 Times in 585 Posts
Middle ring is definitely a goner. I'd still roll the dice on the big and granny rings, but wouldn't shed any tears if they skipped and I had to start with a new set.
__________________
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
RUSA #7498
ThermionicScott is offline  
Old 04-22-18, 09:58 PM
  #5  
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Posts: 8,027

Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Mentioned: 112 Post(s)
Tagged: 0 Thread(s)
Quoted: 1078 Post(s)
Liked 510 Times in 364 Posts
If they still shift well and transmit power uninterrupted, they could be ready for lots more service imo.


With a new chain, a badly-worn freewheel cog will skip under power, while a worn chainring usually only has a rumbling sound under hard pedaling with new chain.


Use caution while testing for the amount of pedaling force that this chainset can sustain with whatever chain you put with it.
dddd is offline  
Old 04-22-18, 10:34 PM
  #6  
Salamandrine 
Senior Member
 
Join Date: Oct 2015
Location: Los Angeles
Posts: 6,287

Bikes: 78 Masi Criterium, 68 PX10, 2016 Mercian King of Mercia, Rivendell Clem Smith Jr

Mentioned: 120 Post(s)
Tagged: 0 Thread(s)
Quoted: 2311 Post(s)
Liked 563 Times in 404 Posts
Yes they are worn out. There isn't really a huge downside to continuing to use worn out chainrings, as dddd points out, but even so I'd replace them myself.

How many miles on these? It's possible you may be using too much lube, or not cleaning your chain often enough.
Salamandrine is offline  
Old 04-23-18, 06:07 AM
  #7  
jj1091
Mike J
 
Join Date: Nov 2013
Location: Jacksonville Florida
Posts: 1,609

Bikes: 1975 Peugeot PX-50L, 1971 Peugeot PX-10, 1974 Peugeot PX-8

Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 392 Post(s)
Likes: 0
Liked 6 Times in 6 Posts
Looks like someone was bored when they posted this. No, really, they're just fine old chain-rings with lots of patina.
jj1091 is offline  
Old 04-23-18, 06:40 AM
  #8  
ppg677
Senior Member
Thread Starter
 
Join Date: Feb 2012
Location: Madison, WI
Posts: 648

Bikes: 1982 Trek 957 (retro), 70s Gios Torino, 80s Trek 710 (retro), 1995 Trek 930 MTB (singlespeed), Surly LHT

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
I'm working on a restore of the 24" MTB I had as a kid. A nickel-plated Mongoose ATB. Hard to believe my 10-14 year old self put that much wear on them!

I think I'll just replace the middle ring given I have no idea if my own 10-year old kid will even want to ride a 30-year old bike.
ppg677 is offline  
Old 04-23-18, 02:11 PM
  #9  
Dfrost 
Senior Member
 
Dfrost's Avatar
 
Join Date: May 2013
Location: Pacific Northwest
Posts: 1,724

Bikes: 87 Marinoni SLX Sports Tourer, 79 Miyata 912 by Gugificazione

Mentioned: 145 Post(s)
Tagged: 0 Thread(s)
Quoted: 404 Post(s)
Liked 177 Times in 119 Posts
I’d also call the granny ring toast even if it is TA ring, or you could rotate it by one bolt. Note the bigger tooth gaps on that ring in locations perpendicular to the crank arm, as well as the wear on surface below the teeth.

You wouldn’t want your kid to crash down when the chain skips just as he’s standing to push up a steep hill!

The granny ring transmits more torque than the other rings, so always use a stainless granny (Rivendell sells a Sugino version) on my bikes, but maybe this project doesn’t justify that expense.
Dfrost is offline  
Old 04-25-18, 06:59 AM
  #10  
due ruote 
Senior Member
 
due ruote's Avatar
 
Join Date: Dec 2006
Posts: 7,352
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 776 Post(s)
Liked 271 Times in 181 Posts
Originally Posted by Salamandrine View Post
Yes they are worn out. There isn't really a huge downside to continuing to use worn out chainrings, as dddd points out, but even so I'd replace them myself.

How many miles on these? It's possible you may be using too much lube, or not cleaning your chain often enough.
Can you amplify on the too much lube comment?
due ruote is offline  
Old 04-25-18, 08:28 AM
  #11  
Salamandrine 
Senior Member
 
Join Date: Oct 2015
Location: Los Angeles
Posts: 6,287

Bikes: 78 Masi Criterium, 68 PX10, 2016 Mercian King of Mercia, Rivendell Clem Smith Jr

Mentioned: 120 Post(s)
Tagged: 0 Thread(s)
Quoted: 2311 Post(s)
Liked 563 Times in 404 Posts
Sure, it was a very common thing I used to see when I was a mechanic. People would love their bikes to death by oiling them before every ride. A wet chain attracts a lot of dirt and grit, which effectively acts like a grinding paste. This wears everything out prematurely.

The magic chain oil hawkers of the present day exacerbate this with their recommendations. "Must be reapplied every 100 miles," is an example from one well known manufacturer. Pttthhh. Ridiculous. Better to err on the dry side.
Salamandrine is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.