Moving from 16t to 17t cog chain length question
07-11-11, 11:16 AM
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Moving from 17t to 16t cog chain length question
How much of a difference would that cog jump make with my chain length?
Currently, I'm running 46/17. I ordered a new cog recently and overlooked possibly having to change my chain length. Right now, the back wheel is near the end of the dropouts. Will I have to get a chain breaking tool at the local LBS, or will the cog jump make a small difference?
Currently, I'm running 46/17. I ordered a new cog recently and overlooked possibly having to change my chain length. Right now, the back wheel is near the end of the dropouts. Will I have to get a chain breaking tool at the local LBS, or will the cog jump make a small difference?
Last edited by RenzSouljohnson; 07-11-11 at 12:46 PM.
07-11-11, 11:20 AM
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I'm not sure if you're going from a 16 to a 17 as the thread title states, or if you're moving from your current 17 to a 16 as your post implies.
If you're far back in the dropouts and switching to a smaller cog, you'll probably want to remove a link or two. If you're going with a bigger cog, that'll effectively move you forward a bit in the drop outs, so there's probably nothing you need to do.
If you're far back in the dropouts and switching to a smaller cog, you'll probably want to remove a link or two. If you're going with a bigger cog, that'll effectively move you forward a bit in the drop outs, so there's probably nothing you need to do.
07-11-11, 11:25 AM
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A one tooth change in cog or chainring will move the axle approximately 1/8" in the dropout.
07-11-11, 11:34 AM
#5
Your cog is slipping.
Dude wants to move his wheel closer to his seat tube by switching to a bigger cog. But - as TT said - going up one tooth isn't going to make a difference significant enough to need to shorten the chain.
OP - you could always remove a full link and get one of these:
OP - you could always remove a full link and get one of these:
Last edited by Scrodzilla; 07-11-11 at 03:09 PM. Reason: zzzpellin'
07-11-11, 11:35 AM
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07-11-11, 12:21 PM
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How much of a difference would that cog jump make with my chain length?
Currently, I'm running 46/17. I ordered a new cog recently and overlooked possibly having to change my chain length. Right now, the back wheel is near the end of the dropouts. Will I have to get a chain breaking tool at the local LBS, or will the cog jump make a small difference?
Currently, I'm running 46/17. I ordered a new cog recently and overlooked possibly having to change my chain length. Right now, the back wheel is near the end of the dropouts. Will I have to get a chain breaking tool at the local LBS, or will the cog jump make a small difference?
07-11-11, 12:30 PM
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Haha just realized I did that with the title. I meant I'm going from 17 to 16.
But yes, I was thinking about going to a half link just to make things a bit less complicated..
But yes, I was thinking about going to a half link just to make things a bit less complicated..
07-11-11, 12:33 PM
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The OP is trying to change gearing and is concerned about the resulting change in rear axle position.
TejanoTrackie says that upping the cog by 1 tooth with move the axle approximately 1/8".
OP will not need to lengthen chain if he or she has more than 1/8" available space.
Questions?
TejanoTrackie says that upping the cog by 1 tooth with move the axle approximately 1/8".
OP will not need to lengthen chain if he or she has more than 1/8" available space.
Questions?
07-11-11, 12:50 PM
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Apologies for the confusion but scrod is more or less right. I'm getting a smaller cog and am concerned that the chain will be too long to stay on the dropouts.
After all of your help, I realized ill most likely need a chain tool anyways and a half link just in case anything goes amiss while removing chain links
After all of your help, I realized ill most likely need a chain tool anyways and a half link just in case anything goes amiss while removing chain links
07-11-11, 03:09 PM
#11
Your cog is slipping.
Phew!
07-11-11, 07:11 PM
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there is waaaaay too much thinking going on here. Put on new cog, see what happens. Easy right?
07-11-11, 07:15 PM
#14
Your cog is slipping.
07-11-11, 11:23 PM
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yeah but i was trying to avoid having to buy any more things and messing up. Ended up buying a new non-heavy duty chain that works with most chain tools available. Worked out very well and now the bike runs nicely with my new EAI cog 
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