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Chain length: Non issue?

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Old 02-11-18 | 06:11 AM
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Bikes: RSO E-tire dropper fixie brifter

Chain length: Non issue?

If going from combo #1 to combo #2, the chain length should change much as far as slack, correct?

combo #1
Shimano Acera M360 R-derailleur
FSA Dyna Drive 48/38/28
Shimano HG31 11-32, 8 speed
KMC Z7

combo #2
Shimano acera rd-410 R-derailleur
FSA Dyna Drive 48/38/28
Shimano CS-HG31 11-30, 8 Speed
KMC Z7
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Old 02-11-18 | 07:43 AM
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So, you're going with a cassette that has 2 extra teeth.

If your chain currently has 2 extra links slack when in the big/big combination, then you'll probably be ok. Otherwise, add 2 links.

Is the new cassette new?
How old is the chain? If you have more than 1000 miles or so on your chain, then throw it out too, and start with a new chain and a new cassette.
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Old 02-11-18 | 08:03 AM
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Bikes: RSO E-tire dropper fixie brifter

oops, I should have stated that combo #2 is going all new components, nothing physically reused from combo #1. Only reused if it matters are two associated part numbers which is the FSA and KMC.

Yes, the intention out of personal preference is to obtain a better slight "highway" gear at the time of predetermined, scheduled/yearly-winter-boredom-maintenance.
Nothing wrong with the old stuff, especially since the chain is semiannually replaced with a new one after a bi-monthly swap out with the pre-inspected/cleaned/lubricated and shelved last used chain.

I've come to like my method of maintenance as it really works well for myself. May not fit others criteria or check-off to there convenience factor list.
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Old 02-11-18 | 08:33 AM
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Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Hmm, as I read it the large cog on the new cassette has 2 fewer teeth, so totally a non-issue.
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Old 02-11-18 | 09:18 AM
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Bikes: RSO E-tire dropper fixie brifter

Just dont want to have chain slapping the frame rail.
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Old 02-11-18 | 09:43 AM
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Chainstay lenght? Same frame? or not?
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Old 02-11-18 | 09:54 AM
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How is going from-
11-13-15-18-21-24-28-32T
to
11-13-15-17-20-23-26-30T
Giving you better "highway gears", when the 3 smallest cogs are the same?

If you said I hate that 18-15 jump, I'd understand, since 17-15 is an easier "progression".
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Old 02-11-18 | 11:55 AM
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Bikes: RSO E-tire dropper fixie brifter

less shifting with the FD when using the 30T as well as a smaller benefit from not needing to shift right out of the gate regarding the creeper gear. Minimal benefits to some, considerably more rewarding on my end.
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Old 02-11-18 | 11:58 AM
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Bikes: RSO E-tire dropper fixie brifter

Originally Posted by trailangel
Chainstay lenght? Same frame? or not?
same bike, nothing else changed that'd impact the chain mech-x
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