Chain service intervals
- Replace at elongation0.5%a measurementPark Tool — when to replace a chainRead 2026-08-20
- Replace at elongation0.75%a measurementPark Tool — when to replace a chainRead 2026-08-20
- Replace at elongationSRAM · Eagle0.8%a measurementSRAM support — when should I replace my SRAM Eagle chainRead 2026-08-20Secondary source
- Replace the quick linkShimanono published figureridesShimano DM-MACN001-07 (Mar 2024)Read 2026-08-20 · Revision 07
Notes on these figures
- Replace at elongation
Attribute to Park Tool or 'industry standard'. NEVER to Shimano: Shimano publishes no elongation percentage at all, and the universally quoted 'Shimano 0.5%/0.75%' comes from the TL-CN42 gauge, a 7-11 speed tool, not a spec sheet.
- Replace at elongation · SRAM
SRAM ships its own 0.8% gauge. Telling an Eagle owner 0.5% replaces their chain roughly 60% more often than SRAM asks, which is real money on a 12-speed chain. This brand rule must beat the speed-count default.
- Replace the quick link · Shimano
Not an interval: a rule. 'Do not reuse a QUICK-LINK that has been removed.' Surfaced as a checklist item whenever a chain is removed, never as a countdown.
Sources last checked 2026-08-20.
Gathered by hand from manufacturer documentation, never scraped. Manufacturers change these figures and sometimes contradict themselves. Always check your own manual, and treat this as a reference rather than an instruction.