Hi all.
Any experts out there on chain wear?
I was under the impression that chains should be changed when they'd 'stretched' by 1%. So I was surprised to notice that when I bought a Park Tools chain checker yesterday it measured not 1% of stretch but 0.75% of stretch.
I just checked up on this, and noticed that the one I've bought is a CC-3.2. It seems to be an updated version of the CC-3. The CC-3 measured 0.75% and 1% of wear. But get this - the CC-3.2 measures 0.5% and 0.75% of wear and NOT 1%.
There's no information about this change on the Park Tools website but it would seem that they've changed the point at which we should chuck out our chains.
It would seem that, effectively, they've been saying chains were ok at 0.75% stretch and now suddenly they're not. Huh? Why not?
My only interest is that I keep my bikes healthy, so I want to chuck out a chain before it begins to wear the cassette and chainrings too fast, but equally I don't want to throw money at new chains unnecessarily.
Can anyone advise on whether chucking out at 0.75% is sensible or not. By the way, the chain I'm worrying about now on my winter bike has nearly 0.75% of stretch and has done 3,368km (2092 miles) in all weathers (but it's been a mild winter here in the UK). That's only 3 months of riding, and a new chain every 3 months is more expensive than I'd like.
Any thoughts appreciated.
Jason in London
Any experts out there on chain wear?
I was under the impression that chains should be changed when they'd 'stretched' by 1%. So I was surprised to notice that when I bought a Park Tools chain checker yesterday it measured not 1% of stretch but 0.75% of stretch.
I just checked up on this, and noticed that the one I've bought is a CC-3.2. It seems to be an updated version of the CC-3. The CC-3 measured 0.75% and 1% of wear. But get this - the CC-3.2 measures 0.5% and 0.75% of wear and NOT 1%.
There's no information about this change on the Park Tools website but it would seem that they've changed the point at which we should chuck out our chains.
It would seem that, effectively, they've been saying chains were ok at 0.75% stretch and now suddenly they're not. Huh? Why not?
My only interest is that I keep my bikes healthy, so I want to chuck out a chain before it begins to wear the cassette and chainrings too fast, but equally I don't want to throw money at new chains unnecessarily.
Can anyone advise on whether chucking out at 0.75% is sensible or not. By the way, the chain I'm worrying about now on my winter bike has nearly 0.75% of stretch and has done 3,368km (2092 miles) in all weathers (but it's been a mild winter here in the UK). That's only 3 months of riding, and a new chain every 3 months is more expensive than I'd like.
Any thoughts appreciated.
Jason in London