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MountainBikeReview.com's Forum Archives - Everything Drivetrain
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Changed cassette, what about chain length? (7 posts)
|  Changed cassette, what about chain length? | Nab
Jan 3, 2004 7:37 PM | | Hey guys,
So i was using a 44 front and 28 back and i used the 1 extra chain piece measurement thingie for the chain. So now, my biggest at the back is 30. Do i need to adjust the chain length or anything? Does the rear derailleur suffer? |
| Depends... | f'nætik (aka næstep)
Jan 3, 2004 11:44 PM | | If you can shift to big-big and still have a little play in the chain (accounting for any suspension movement, if that is applicable).
But why not just start with a new chain and size it from scratch accordingly?
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| Went cycling | N
Jan 4, 2004 1:00 PM | | So i tested it. It was normal i guess. I'm just worried the derailleur might snap from the tension. Sheesh. And the chain is a month old. Damn! What to do, what to do....sheesh |
| With a properly sized chain... | f'nætik (aka næstep)
Jan 4, 2004 1:14 PM | | ...your rear derailleur ought to looksomething like this when you're in the big-big combination:
Note how the the derailleur pivots come close to being parallel with a line drawn from the large cog to the large ring.
Remember also, it's just a "safety feature" of sorts, since you shouldn't be in the big-big gear combination unless you accidentally shift there. Sounds to me like your chain length is fine. |
| With a properly sized chain... | Nab
Jan 4, 2004 4:27 PM | | Thanks for showing me that. Now i can sleep peacefully tonight. Do you let your derailleur "rest" when you don't cycle? ( small, small position ) |
| My derailleurs, thankfully, are all grown up and out of the house... | f'nætik (aka næstep)
Jan 4, 2004 7:22 PM | | My bikes are all derailleurless thanks to internally geared hubs. But to answer your question, no, I never paid attention to what position my derailleurs were in when I parked my bike. I suppose it makes a bit of sense, depending on how long your derailleurs last. |
| Do you let your derailleur "rest" when you don't cycle? | innergel
Jan 8, 2004 9:15 AM | | The stress you are taking off your derailleur by letting it "rest" has got to be negligible compared to the stresses you put on it while riding. I can't see how it would extend the life of it by any significant amount. That derailleur is put under much more of a workout when it's being ridden, esp. under load, that having it rest in one static position vs. another seems like unnecessary worry to me.
Just my opinion. |
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