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https://cyclingapps.net
www.patreon.com/fastfitnesstips
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https://cyclingapps.net
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https://cyclingapps.net
FFT Magic Chain Wear Calculator
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https://cyclingapps.net
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https://cyclingapps.net
https://youtu.be/gDmUPMsGNKo
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>> Calculates your chain wear from *WHOLE LINKS* and predicts when its time to change chains <<
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A.
Prefer mm (enter 1) or inches (enter 2)
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you prefer mm
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B.Enter Chain Length Measurement
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Exact measurement of any # of *whole links*
100.04mmaka3 61/65
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optionally: enter measurement date
12/12/2025inches
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Warning ✋: measurement looks wrong
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As new your chain should be76.2mmover3
You should measure >7 whole links
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Please measure a longer section
links
as carefully as possible for an accurate
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assessment of wear (unless you have micrometer guage)
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C.Results
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Your Chain elongation % (vs ideal)31.29
percent
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Warning: elongation impossibly large!
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Chain elongation (over measured section)
23.84mmaka61/65
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inch
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Your typical watts when riding220watts
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Approx watts lost (vs ideal)503.68watts
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Our Recommendation >>>
definately replace chain now
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Your cassette & chainrings very likely worn out too
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…..Optional wear rate section below………………..
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D.
ADVANCED: Chain Wear Predictor (from distance)
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Chain expiry threshold (eg 0.75%)0.75
moderate wear
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Your cycling distance per year3500km
(in miles)
2175
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Predicted chain expiry date9-May-2011-5422
already expired X days ago
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takes into account baseline wear+distance+watts under moderately adverse conditions
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