Reading something today in the 'Haynes Bike Book' (1994) caught my eye, as follows:
"Shimano Hyperglide chains....These are appearing very frequently now, and are now the norm on all but the very cheapest of new bikes...These chains need a special pin to rejoin them after being split.....If these chains are rejoined in the traditional manner, then although they will appear to join, the joined pin will over time work loose, causing your chain to suddenly break".
To begin with I wasn't even aware there *was* such a chain, and secondly, I'm not even aware if I've ever used one, and thirdly, I just use my chain splitter ad infinitum! I need to be more aware of what chain is what, yes? (seldom buy new chains...use a lot of second hand stuff)
"Bob Flemming" <[email hidden]> wrote in message "]news:[email hidden]...
<snipped stuff about wonderful Shimano chain pins>
The only Shimano chains I use are those that come as original equipment on a bike. Sram chains are just fine and come with an undoable (is that a word?) link (Powerlink).
These are available on their own and IMHO are a better bet for rejoining a Shimano chain.
As I learned on a recent ride it's worth keeping used Sram links in your bike tool kit to rejoin broken chains. Not only does this save the aggro and potential weakness of forcing a pin back but also means the chain retains its original length.
"Bob Flemming" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
Reading something today in the 'Haynes Bike Book' (1994) caught my eye, as follows:
"Shimano Hyperglide chains....These are appearing very frequently now, and are now the norm on all but the very cheapest of new bikes...These chains need a special pin to rejoin them after being split.....If these chains are rejoined in the traditional manner, then although they will appear to join, the joined pin will over time work loose, causing your chain to suddenly break".
To begin with I wasn't even aware there *was* such a chain, and secondly, I'm not even aware if I've ever used one, and thirdly, I just use my chain splitter ad infinitum! I need to be more aware of what chain is what, yes? (seldom buy new chains...use a lot of second hand stuff)
bob
The hyperglide chain on my bike has HG stamped on the centre of every fourth or fifth outer plate. I think Haynes is referring to the black non-standard pins used to rejoin these chains which, I believe, enlarge the hole slightly when fitted. This means you should be careful never to split the chain by removing one of the black pins.
To begin with I wasn't even aware there *was* such a chain, and secondly, I'm not even aware if I've ever used one, and thirdly, I just use my chain splitter ad infinitum! I need to be more aware of what chain is what, yes?
Just another reason to use Sram chains AFAIC. But "all but the cheapest" is putting it a bit strongly. Large numbers of perfectly decent bikes ship with Z chains (which I consider terrible but others have found acceptable), and some good bikes with Sram.
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