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#1
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chain ring replacement
I have seen it written here that one should replace the chain whe replacing the cassette, for reasons related to wear. I had done thi when replacing my cassette recently, but wondered if I should als replace the chainrings for the same reasons. Any insights? Kur -- kziegel |
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#2
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On Sun, 15 Aug 2004 15:46:32 +1000, kziegel
wrote: I have seen it written here that one should replace the chain when replacing the cassette, for reasons related to wear. I had done this when replacing my cassette recently, but wondered if I should also replace the chainrings for the same reasons. Any insights? Chainrings usually wear more slowly than cassette or freewheel sprockets in general, although some aluminum ones may wear faster than some hardened steel types, and the absolute rate of wear will vary from bike to bike and rider to rider. Inspect and replace as needed; make no assumptions that any other specific policy always needs to be followed. Many riders put the majority of their wear on one ring, and find that they don't need to replace all three at the same time. If you need to replace all of them, or even two, you may discover that a replacement crank set with rings is cheaper. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#3
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"kziegel" wrote:
I have seen it written here that one should replace the chain when replacing the cassette, for reasons related to wear. I had done this when replacing my cassette recently, but wondered if I should also replace the chainrings for the same reasons. Any insights? There's no reason to replace the cassette every time you replace a chain. And certainly no reason to replace chainrings that often. Measure your chain when you have about 2500 miles on it. When a 12-inch section (12 full links) "stretches" to 12-1/16 inches, replace it. If you replace your chain before it becomes overly "stretched," your cassette will last longer. A cassette should outlast several chains. A decent chainring should last even longer. A chainring is worn when the teeth show pronounced hooking. Art Harris |
#4
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Take good care of your chain, measure it for wear, and replace when
necessary. (I just replace mine every year or 3000 miles. It probably isn't necessary then, either, but I figure it's relatively cheap insurance.) I've never had to replace cogs or rings due to wear. kziegel wrote: I have seen it written here that one should replace the chain when replacing the cassette, for reasons related to wear. I had done this when replacing my cassette recently, but wondered if I should also replace the chainrings for the same reasons. Any insights? Kurt |
#5
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Arthur Harris wrote in message ... A decent chainring should last even longer. A chainring is worn when the teeth show pronounced hooking. I've always assumed this is where the term chain suck originates, as in the chain is sucked to the chainring as the ring is worn and the long pitch chain sticks against the teeth as the chain travels towards the rear sprocket. Come to think, I've seen chainrings which are ramped when worn and not hooked. The tooth profile used allows sprocket whether front or back to be used until the chain slips off under pressure. How do hooked teeth preclude a chainrings use, and have you seen this and experienced any detrimental effect? Trevor |
#6
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"Arthur Harris" wrote in message t...
"kziegel" wrote: I have seen it written here that one should replace the chain when replacing the cassette, for reasons related to wear. I had done this when replacing my cassette recently, but wondered if I should also replace the chainrings for the same reasons. Any insights? There's no reason to replace the cassette every time you replace a chain. And certainly no reason to replace chainrings that often. Measure your chain when you have about 2500 miles on it. When a 12-inch section (12 full links) "stretches" to 12-1/16 inches, replace it. If you replace your chain before it becomes overly "stretched," your cassette will last longer. A cassette should outlast several chains. A decent chainring should last even longer. A chainring is worn when the teeth show pronounced hooking. You flipped around his comment; he (correctly) stated one should replace the chain when replacing cassettes, not replacing cassettes when replacing chains. Your advice about checking wear to determine wear before replacing a chain is good, but depending on riding type and other factors if one waits until 2500 miles they may have worn out chainrings and cassettes by riding for quite a bit on a 'overly stretched' chain. Around here, with lots of hills, most folks get only 1000-2000 miles, tops, on a chain. Personally, I tend to get 1200-1800 miles, so I check every time I clean my chain. Takes 30 seconds or so. Lest anyone jump on the '9 speed chains wear faster' nonsense, the chains on my 6 speed bikes wear just as fast as the 9 speed chains. I have noticed no difference in longevity between SRAM, Shimano, and Wippermann branded chains. - rick |
#7
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"Arthur Harris" wrote in message t...
"kziegel" wrote: I have seen it written here that one should replace the chain when replacing the cassette, for reasons related to wear. I had done this when replacing my cassette recently, but wondered if I should also replace the chainrings for the same reasons. Any insights? There's no reason to replace the cassette every time you replace a chain. And certainly no reason to replace chainrings that often. Measure your chain when you have about 2500 miles on it. When a 12-inch section (12 full links) "stretches" to 12-1/16 inches, replace it. If you replace your chain before it becomes overly "stretched," your cassette will last longer. A cassette should outlast several chains. A decent chainring should last even longer. A chainring is worn when the teeth show pronounced hooking. You flipped around his comment; he (correctly) stated one should replace the chain when replacing cassettes, not replacing cassettes when replacing chains. Your advice about checking wear to determine wear before replacing a chain is good, but depending on riding type and other factors if one waits until 2500 miles they may have worn out chainrings and cassettes by riding for quite a bit on a 'overly stretched' chain. Around here, with lots of hills, most folks get only 1000-2000 miles, tops, on a chain. Personally, I tend to get 1200-1800 miles, so I check every time I clean my chain. Takes 30 seconds or so. Lest anyone jump on the '9 speed chains wear faster' nonsense, the chains on my 6 speed bikes wear just as fast as the 9 speed chains. I have noticed no difference in longevity between SRAM, Shimano, and Wippermann branded chains. - rick |
#8
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Rick Warner wrote in message ... by riding for quite a bit on a 'overly stretched' chain. Around here, with lots of hills, most folks get only 1000-2000 miles, tops, on a chain. Personally, I tend to get 1200-1800 miles, so I check every time I clean my chain. Takes 30 seconds or so. Lest anyone jump on the '9 speed chains wear faster' nonsense, the chains on my 6 speed bikes wear just as fast as the 9 speed chains. I have noticed no difference in longevity between SRAM, Shimano, and Wippermann branded chains. She must be fit, the lady in the bike shop. Or do you work in the bike shop?] Trevor |
#9
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Rick Warner wrote in message ... by riding for quite a bit on a 'overly stretched' chain. Around here, with lots of hills, most folks get only 1000-2000 miles, tops, on a chain. Personally, I tend to get 1200-1800 miles, so I check every time I clean my chain. Takes 30 seconds or so. Lest anyone jump on the '9 speed chains wear faster' nonsense, the chains on my 6 speed bikes wear just as fast as the 9 speed chains. I have noticed no difference in longevity between SRAM, Shimano, and Wippermann branded chains. She must be fit, the lady in the bike shop. Or do you work in the bike shop?] Trevor |
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