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

New: Take part in the October Giveaway for a Whiskey Tango Foxtrot urban gravel bike from Van Dessel Cycles


Measuring Chain stretch
#1
My bike repair shop says that chain stretch should be measured with the chain under 'medium' tension.
I'm not sure how you would do this using the '12-inch ruler' method described in the video on this site. Does the chain need to be under tension when measuring?
My gut tells me the bike shop may be saying this to simulate the chain under stress/in heavy use, but their methods are leading me to a LOT of chain/cassette replacements in the last year. I do ride every day, in all kinds of weather (rain, sun, etc), but I clean and lube the chain each month. (I ride about 5K per year).
thanks.

  Reply
#2
The chain needs to be held tight enough that each joint is held solid and straight, but not under any load. I just push lightly with my hand on a pedal while I'm measuring. If there's no tension on it, each link could have a slight bend which would mess up your reading. But chains don't "stretch", so I don't think you'd get a different reading under light or heavy tension.
I usually let the chain go a little longer than the normal recommendation, but I also change chain and cassette at the same time routinely. I'm probably putting more wear on my front chainrings, but it hasn't been a problem. Changing chain and cassette more than twice a year seems a little excessive. But it does vary a lot by how much you ride, conditions, how forceful you are, etc.

  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
9,479
02-24-2017, 02:15 AM
Last Post: LorindaCollins
 
8,256
12-27-2010, 09:49 AM
Last Post: bobtravers
 
8,476
04-07-2009, 08:15 PM
Last Post: DaveM

Forum Jump:

[-]
10 Latest Posts
What do you like about gravel bikes?
Yesterday 07:28 PM
Western Flyer Restoration
Yesterday 02:07 PM
Bikes on the balcony for winter
Yesterday 01:27 PM
Do Any Electric Bike Allows You to Switc...
10-29-2020 10:36 PM
Looking for a hybrid for neighborhood an...
10-29-2020 08:31 PM
Looking for information
10-29-2020 06:47 PM
The deadliest U.S. counties for cyclists
10-27-2020 08:44 PM
Hello from Maine!
10-27-2020 08:41 PM
How to remove a Dork disc
10-27-2020 07:19 PM
2020 road cycling season
10-27-2020 07:18 PM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
29 posts
no avatar 2. JoJoJo
9 posts
no avatar 3. Sagan97
8 posts
no avatar 4. Papa Dom
7 posts
no avatar 5. Painkiller
7 posts