When a Cassette Goes Bad
The morning after getting my Bianchi Boron back from the shop with all new cables and cable housing, I got on the steed and cranked. Something weird happened. And it happened as I was going through the intersection at the end of my street, which is disconcerting to say the least.
The rear derailleur shifted on its own. Then it shifted back when I cranked again. I tried to make minor adjustments, but that didn’t fix anything. I couldn’t ride a bike that was ghost shifting, not on my commute.
The guy at the shop rode it, looked at it, and then slid the chain whip in place, and found the problem. The cassette was worn enough to cause the chain to slide over the rounded teeth, and not stay on them as it was designed.
New Campagnolo Centaur cassettes are expensive, even for this 11+ year old beast. The mechanic suggested I look on Amazon, and lo and behold, I found a perfect match for $84.
There are a couple of lessons to be learned from this: a) When buying a used bike, inspect the shit out of every little part of it, including the teeth on each sprocket. I bought this bike only 8 months ago and have dumped hundreds into it because I didn’t inspect it well enough. I made a mistake in buying it. b) When getting work done on a bike, don’t be stupid and wait until the morning to test it out if you need it for commuting. c) Immediately going to craigslist for bike parts is not always best. So many parts and bikes there are stolen, and that is not an economy we want to bolster. Good prices can be ubiquitous.