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Chainwheels
Hi, My chain is becoming dangerously stretched, so I've started fitting my
replacement cassette and chain. I've just stopped in the middle as I'm wondering about the chainwheels ... they're about 4 years old, don't really give any trouble, but should they be replaced periodically? Thanks |
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#2
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Chainwheels
elyob wrote:
Hi, My chain is becoming dangerously stretched, so I've started fitting my replacement cassette and chain. I've just stopped in the middle as I'm wondering about the chainwheels ... they're about 4 years old, don't really give any trouble, but should they be replaced periodically? Chainrings tend to outlive cassettes, sometimes several cassettes, especially the larger ones as they're so much larger than rear sprockets--load is spread more evenly. I would fit the new chain and see how it works on the existing chainrings. No need for new rings if it works fine. But it might skip (or cause some other nastiness) if the ring(s) have already been significantly worn from the stretched chain. Judjing from appearance is not good enough, IMO. ~PB |
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Chainwheels
"Pete Biggs" wrote in message ... elyob wrote: Hi, My chain is becoming dangerously stretched, so I've started fitting my replacement cassette and chain. I've just stopped in the middle as I'm wondering about the chainwheels ... they're about 4 years old, don't really give any trouble, but should they be replaced periodically? Chainrings tend to outlive cassettes, sometimes several cassettes, especially the larger ones as they're so much larger than rear sprockets--load is spread more evenly. I would fit the new chain and see how it works on the existing chainrings. No need for new rings if it works fine. But it might skip (or cause some other nastiness) if the ring(s) have already been significantly worn from the stretched chain. Judjing from appearance is not good enough, IMO. I was more thinking of the little wheels on the rear gears. The little hanging derailleur. The front chain rings were replaced last chain, so I'm hoping they're okay. Thanks |
#4
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Chainwheels
elyob wrote:
I was more thinking of the little wheels on the rear gears. The little hanging derailleur. The front chain rings were replaced last chain, so I'm hoping they're okay. Oh the jockey wheels. They don't take a lot of load so aren't important to replace frequently. They can last for tens of thousands of miles. Perhaps fair enough to go by appearance for them: the teeth become spikey when worn out, but bear in mind that top and bottom wheels can be different from new. Also most top jockey wheels have "float", making them feel wobbly--this is normal. ~PB |
#5
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Chainwheels
elyob wrote: Hi, My chain is becoming dangerously stretched, so I've started fitting my replacement cassette and chain. I've just stopped in the middle as I'm wondering about the chainwheels ... they're about 4 years old, don't really give any trouble, but should they be replaced periodically? Clean them up. Do they spin without resistance? Yes, they're fine. No, change them. I had some SRAM ones go after a few thousand miles, but the more expensive ceramic bushed Sante ones are still going just fine after 30K plus. ...d |
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