KMC Easy Chain Checker
¥2,354
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Convenient and portable Easily know your chain condition anytime, anywhere!
If you regularly check your chain elongation, when the checker starts to sink, it means that the chain has worn out more than 75% and 25% of the mileage so far can still be driven. For example, if the checkers begin to show wear after 4800 km, the chain must be replaced within approximately another 1600 km.
If you follow this guideline, you can continue to ride comfortably without having to replace the chainwheel or the cassette itself!
SPEC
Size: 100mm
Weight: 10g