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Campy shifting problem & chain/cassette replacement
Hello,
I have a Campy Chorus (2000) chain and cassette ridden about 6000 miles (never in wet conditions). Infrequently as of late the chain will fall off to the inside when I am shifting from small to large chainring. After checking the derailleur's adjustment and it appearing correct, I thought perhaps chain wear was the cause. I measured the chain for elongation on the bike with an accurate ruler, and found none (exactly 12 inches rivet edge to rivet edge). According to several sources, my mileage is high for no elongation. Might other aspects of the chain have worn, causing the intermittent shifting problem? Should I replace it, or so long as there is no elongation there is no need to do so? Does the cassette need to be replaced at the same time, or do cassettes last longer than chains? Any other factors that could be causing the shifting problem? Thanks in advance, John |
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franandjohn- I have a Campy Chorus (2000) chain and cassette ridden about
6000 miles (never in wet conditions). Infrequently as of late the chain will fall off to the inside when I am shifting from small to large chainring. After checking the derailleur's adjustment and it appearing correct, I thought perhaps chain wear was the cause. I measured the chain for elongation on the bike with an accurate ruler, and found none (exactly 12 inches rivet edge to rivet edge). According to several sources, my mileage is high for no elongation. Might other aspects of the chain have worn, causing the intermittent shifting problem? Should I replace it, or so long as there is no elongation there is no need to do so? Does the cassette need to be replaced at the same time, or do cassettes last longer than chains? Any other factors that could be causing the shifting problem? I answer-Most of the chain fall off problems I see are front der adjustment related, not chain wear related. Chains do get more flexy over time and your measurement idea is the best way to check it. If it is indeed at 12 inches for a taught chain, no worry, adjust the front der. As the chain gets thrown around up front, the adjustment, etc of the front der can change. If you do change the chain, and the casette skips under pressure, it is indeed worn out. Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
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