Home / Open data / Bicycle chain wear replacement thresholds, as makers publish them
Bicycle chain wear replacement thresholds, as makers publish them
Chain elongation % at which Park Tool, SRAM and Shimano say to replace a chain, by drivetrain, in their own wording.
- Rows9
- Fields8
- Sources checked11 Oct 2026
- LicenceCC BY 4.0
Download CSV Download JSON2 KB CSV, 6 KB JSON, UTF-8. Used on Chain wear thresholds.
The chain wear (elongation) point at which Park Tool, SRAM and Shimano say to replace a bicycle chain, by drivetrain (single-speed, 10-speed or less, 11-speed or more, SRAM, Shimano), in each publisher’s own wording. threshold_pct is empty where the publisher gives no percentage (Shimano publishes a gauge only). Every row links the publisher’s page and the date it was checked.
How to cite
Fields
| Field | Type | Meaning |
|---|---|---|
publisher | text | Who publishes the threshold |
source_title | text | Title of the page or document |
scope | text | Chains the threshold applies to |
drivetrains | text | Drivetrain groups the row covers (several separated by " | ") |
threshold_pct | number | Replacement point in % elongation; empty if not published |
wording | text | The publisher’s wording |
source_url | url | Source page |
checked | date | Date Pedal Brief checked the source |
Empty cell = the source doesn’t state it. Several values in one cell are separated by “ | ”.
Licence
Pedal Brief’s compilation (the selection and arrangement of these rows and the files) is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0). You may copy, share and adapt it, commercially too, if you credit Pedal Brief (pedalbrief.com) with a link to the dataset page, link to the licence and say if you changed the data.
The facts themselves (figures, specs, team equipment) come from the sources named in each row: brands, race organisers, tourism offices and the UCI. We claim no rights in those facts. Brand and team names and trademarks belong to their owners; the licence does not cover trademarks. The data is provided as is, without warranty: check the source before relying on a figure. Reuse doesn’t mean Pedal Brief endorses you.
5 source pages
- www.parktool.com https://www.parktool.com/en-us/blog/repair-help/when-to-replace-a-chain-on-a-bicycle
- www.parktool.com https://www.parktool.com/en-us/product/chain-wear-indicator-cc-3-2
- www.parktool.com https://www.parktool.com/assets/doc/product/CC-4.2_instructions.pdf
- support.sram.com https://support.sram.com/hc/en-us/articles/5928711817755-When-should-I-replace-my-SRAM-Eagle-chain
- bike.shimano.com https://bike.shimano.com/en-UK/stories/article/determine-chain-length.html
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