Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take part in the July Giveaway for a brand new 26" Thruster® Street Style BMX Cruiser Bicycle

New product launch: WIN an innovative aeroe Spider Rear Rack


Chain wear indicators
#1
I recently picked up a Park CC-3.2 to put in my portable bike tool-bag (12 inch ruler won't fit).  With it one of my chains that measures fine with the ruler, fails, even at the .75 side.  Reading on the subject states that the CC-3.2 doesn't take into account roller wear, which the Shimano TL-CN41 does. So, I took a popsicle stick (perfect thickness) and shaped it to press the roller nearest the drop-in end of the Park to give similar results to the Shimano and eliminate roller wear anomalies.  Sure enough, measurements come out differently, and what "failed" previously with the Park, now passes.  My question(s):  Is the Park CC-3.2 cut to compensate for roller wear to a point (meaning longer than it would be if the rollers were both pressed against their links in the same direction, as with the Shimano or my popsicle stick)?  If so, my invention would be inaccurate.  Has anyone measured with calipers (vernier) these two tools to see if they are the same distance at their measuring points?
Thanks for any insights or help.
  Reply
#2
I don't know the technical specs of how these tools work. But I'd say that in general, you shouldn't worry about it too much. Even if you know the exact percentage 'stretch' your chain has, it's really a guess as to what to do with that information. Should you replace a chain at .5% wear or .6%? The debate about whether to adjust for "wear on the rollers" sounds like BS to me. The point is that a worn chain doesn't fit the shape of the teeth on the cogs anymore. I don't think it matters much exactly which part of the chain has the wear.

On newer, high end drive trains, replacing a chain before it stretches too much will prevent you having to constantly replace the cassette as well. They are made out of much less durable materials and are much more sensitive to mixing old and new parts together. On older bikes, you can get away with a lot more stretch before it will impact anything. But there's no magic formula.
  Reply
#3
I think I'll carry the Park tool for initial checks, but then pull out a ruler for the final decision. Old school is the best school sometimes. Had just wondered if anybody had done any tests on the accuracy of the chain wear specific tools out there is all.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
1,168
12-08-2019, 05:30 AM
Last Post: Joe_W
 
761
08-11-2019, 09:25 AM
Last Post: Painkiller
 
4,013
12-10-2017, 02:46 PM
Last Post: garrett01
 
10,141
03-16-2015, 06:58 AM
Last Post: 1FJEF
 
7,581
01-06-2011, 01:08 PM
Last Post: Bill
 
18,836
02-21-2010, 03:03 PM
Last Post: Joe_W
 
6,786
12-21-2009, 06:15 PM
Last Post: Bill
 
8,194
11-17-2009, 05:19 PM
Last Post: krider46
 
6,733
07-01-2009, 11:38 PM
Last Post: awmeat

Forum Jump:

[-]
10 Latest Posts
Dork disc - remove it or keep it?
Today 08:39 PM
Post a photo for aeroe Spider Rear Rack
Today 06:27 PM
26" Thruster® Street Style BMX | July 20...
Today 01:24 PM
Creaky crank with play and loosening
Today 11:21 AM
2020 road cycling season
Today 07:18 AM
FD cable pull on opposite side of frame
Today 04:18 AM
60s Viner Repainted..?
Yesterday 06:23 PM
budget speedometer
Yesterday 10:44 AM
Pinging noise fixed
Yesterday 08:08 AM
Need advice on Bike Rack
Yesterday 02:07 AM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
74 posts
no avatar 2. CharleyFarley
21 posts
no avatar 3. Painkiller
14 posts
no avatar 4. Papa Dom
10 posts
no avatar 5. G_M
8 posts