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7 speed cassette replacement

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7 speed cassette replacement

Old 06-27-08, 10:28 AM
  #1  
Randallissimo
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7 speed cassette replacement

I replaced the chain on a 98 Bianchi Ocleot pretend MTB because the bike has about 6K miles and the chain was stretched. I cleaned the derailer, cassette and 3 chainring very well and it looked not that worn to me. Shortened the chain to length, installed it and took it for a spin. It shifted flaky and now it jumps a cog under load. So I guess I have to replace the cassette and chainring, eh? I'd like to try it myself, and not pay my high lbs prices for parts. Any suggestions and/or warnings? Do I need any special tools?
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Old 06-27-08, 10:36 AM
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I got a few 7 spd cassettes from Harris Cyclery. Good selection, fair prices and they ship UBER fast.

It's easy to do but you'll need a little elbow grease and a few tools:

You'll need a chain whip (about $20-30; some people make these themselves) and a cassette tool (only a few bucks) used with a large, long handled wrench to remove, and a torque wrench to install properly (check out Park's website for a great tutorial).

You might wanna buy the cassette and just have the shop install for you if you think you'll never use these tools again. I wound up investing the $ for the whip and the cassette remover cause I already had the big wrench and the torque wrench; plus I have two bikes with two wheelsets each that use 7 speed cassettes and I like to swap out for different cogs depending on where/how I'll be riding.
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Old 06-27-08, 08:52 PM
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Nashbar has some house brand 7 speed cassettes on sale for $15. I just bought a few of them. I have 7 speed cassette hubs on several of my bikes, and like them a lot. The cassettes sold with the Nashbar store brand look exactly like SRAM. They are either a carbon copy fake SRAM or more likely a re-badged SRAM OEM cassette. Either way, the nashies work fine, and they are cheap. While you are at it, they have cheap but good house brand 7-8 speed chains too.
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Old 06-28-08, 10:26 AM
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Just ordered the Nashbar cassette! Got the stem tool and crank extractor, too. Good find, thanks.
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Old 06-29-08, 07:53 AM
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Even if the chain and cassette were worn to the point of needing to be replaced, the chainrings are almost certainly still good. Chainrings are much more tolerant of chain condition than cogs and will typically go through many chains before they are badly worn enough to skip or have shifting problems. 30,000 miles isn't unusual unless they are used in abrasive or harsh conditions.
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Old 06-29-08, 08:04 AM
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Excellent! I was wondering about that.
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