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Chain wear and cassette question
On 2018-11-10 17:06, jbeattie wrote:
On Saturday, November 10, 2018 at 3:09:36 PM UTC-8, Gregory Sutter wrote: On 2018-11-10, Joerg wrote: 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 This post makes me question a lot of things, including your sense of time invested vs getting what you want no matter how the industry has stopped doing it that way. Moving past that, though: If you want to maintain 7sp spacing, then your hub has a 7sp cassette body, probably HG with 31.9mm width. You should tell us specifically what it is, though; widths vary, including the also-7sp Shimano IG. You've posted an 8sp cassette (36.5mm width). Photo #2 shows the one silver and two black pins holding the cogs together. You could think about using a drill press, I suppose, but looking at photo #1 there looks like a color difference between the smallest 3 cogs and the rest, which adds to my suspicion that they're separate from the larger pinned set. If that's so, then you can think about omitting cogs and spacers to fit the smaller width of your cassette body. For the derailer, if your 600 is a GS (aka mid cage) instead of the short one, which I assume it is due to your current 32t configuration, then you might try keeping it and adding a Wolf Tooth Roadlink. Making your bike one more bit of a hack should be considered a central part of this quest, and that fits the bill while hopefully allowing you to keep using existing equipment. https://www.wolftoothcomponents.com/...ducts/roadlink I think the pins could be removed with Joerg's patented nail and a hammer, and the silver pin is a screw. It looks like the Sunrace people are trying to accommodate the build-a-beater set. If they aren't screws they have to be drilled out. With a nail or a punch you'd bend cogs. That Wolftooth is interesting and reminiscent of the new Shimano derailleurs. https://static.biketiresdirect.com/p...0/sh7rd1-1.jpg Joerg needs a gravel bike, which he could get practically anywhere for pretty cheap. Keep the economy strong! Use that giant Trump tax savings! Oh I would but then my wife would make me chuck the trusty old road bike I had since 1982 and I can't bring myself to do that. Yet. Yes, 11sp wears out more quickly, but it is smooth as butt-ah, and he could get hydraulic discs for the super-duper scary road descents, drunk drivers, mountain lions (I brake for mountain lions), etc. Cameron Park demands discs! No 11-speed, I want 7-speed robustness. As for discs, absolutely, rim brakes are totally inferior to those. For a road/gravel bike I'd accept non-hydraulic ones though. For the MTB it has to be hydraulics. I was getting dragged around today by a friend who was on 35mm CX tires and a CX race bike. I was on a Synapse with 28mm slicks. My friend loves his CX race bike with wide range 11sp. It's like 16lbs. We hit some straight up gravel, and he rode away on his little gears. https://tinyurl.com/y7le55hm (steeper than it looks up that cut). Out here that's considered a road. Don't need a gravel bike for that. The bike path to Camino is like that. I just don't ride it with tires that are near end of life. BTW, the Zafiro you once dissed as short-lived surprised me. I've got my last one on there right now and it's pushing past 1400mi which is already 200mi beyond what cheap tires normally do in this area. The square shape is quite extreme but no threads showing yet. Wish those had TWI. Cold but clear, and it warmed up a bit. Lots of scary cars on the way home, but my disc brakes saved me. I would never ride a bike without discs. I could die. Joerg is actually exposing himself to great danger on that early '80s hose-clamp museum piece club racer of his. It's not really a club racer, this bike was completely custom assembled for me and the frame ordered to spec after they measured me like at a taylor. But it's old now. The hose clamp still fulfills its job nicely. The steerer never shook loose again in thousands of miles, including some dirt paths. -- Regards, Joerg http://www.analogconsultants.com/ |
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