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Chain wear and cassette question



 
 
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Old November 11th 18, 05:09 PM posted to rec.bicycles.tech
Joerg[_2_]
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Default 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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