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Chain wear and cassette question
On Saturday, November 10, 2018 at 12:51:38 PM UTC-8, Joerg wrote:
To my amazement a Sachs-Sedis chain will absolutely not exceed 0.5% stretch after more than 5000mi, despite some hills where one has to stand in the pedals. Never had a chain last this long. However, the rollers have developed a lot of play, about 0.040" or 1mm. How much is too much? I guess it's almost finished because of those rollers. Getting older, I'd like to increase the large cog to at least 40T from my current 32T. Of course, that will require me to retire the trusty old Shimano 600 derailer. I don't want the cassette to become ever wider and also need to maintain 7-speed spacing so I can use the more robust old-style 7.3mm pin length chains such as KMC Z50 (can't find the Sachs anymore). In the past I hacked cassettes, installed the cogs I wanted and re-used the old spacers. Can the larger cassettes like in the link below still be hacked apart? I don't mind drilling or dremeling stuff to get them apart. If memory serves me correctly I've installed a Shimano STX-RC freehub on the road bike after the last UG freehub had croaked. https://www.ebay.com/itm/SunRace-CSM...k/132325285327 -- Regards, Joerg http://www.analogconsultants.com/ Joerg, I can't tell what you mean by stretch. Chains do not normally stretch at all. Their rollers wear so that the distance between rollers increases and causes cassette wear. With the price of cassettes these days it's far cheaper to replace a chain that is showing wear than to let it go and have to replace a cassette as well. |
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