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Re: Bike Chain Life

26 January, 2014 08:02AM
Hi Steve,

There is no fixed answer. You need to use a chain gauge to measure how much the chain has stretched/is worn. Most bike shops will check your chain for free, or you can buy a chain gauge for yourself. If the chain is stretched by more than about 0.75% then it should be replaced.

These guidelines depend on the conditions in which you cycle and how often you clean and oil the chain. As a first approximation, if you have 8 or less sprockets on the rear cassette then you probably need to change the chain every 2,000 to 3,000 miles. If you have 9 or more sprockets than 1,000 miles is a plausible number.

The more worn the chain is, the more it wears away at the chainrings and the sprockets on the rear cassette, so at some stage you will need to replace the chainrings and the cassette. My touring bike has 3 chainrings and a 9-speed cassette; by changing the chain whenever it got to 0.6% worn, the chainrings lasted for about 20,000 miles.

- Murray
Subject Author Posted

Bike Chain Life

Steve 25 January, 2014 11:08PM

Re: Bike Chain Life

Murray R Langton 26 January, 2014 08:02AM

Re: Bike Chain Life

Steve 26 January, 2014 06:36PM

Re: Bike Chain Life

Murray R Langton 27 January, 2014 07:29AM


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