I sold a recumbent with 4500 miles and using the first checker in the post above, it had a reading of just under .50. In other words, another 2000 miles should have been easy.
Now the caveat; the chain had been lubed every couple of hundred miles and rarely if ever ridden in wet conditions.
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“Train hard until your legs are tanned, then keep going until the shape arrives.” -Jolanda Neff