SRAM Force 22 rear derailleur – questions
09-26-15, 03:08 PM
#1
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Thread Starter
SRAM Force 22 rear derailleur – questions
Hello,
I noted I can usually shift up 1, 2 or 3 cogs at once with SRAM Force 22, depending on how much I move the shifter, but the questions are:
1. If I start from the smallest cog (11) and move the shifter full range, then it switches 4 cogs at once (from 11 to 15, for around 80% of cases), or it makes a 3 cogs shifting with failure (from 11 to 14, but unsuccessfully trying to lift the chain to the 15th cog, for around 20% of cases). Is this normal?
2. When shifting only one cog at once, I noted that I can solve the failures at the middle of the range (14 – 15 cogs) by tightening the cable. However: when should I stop tightening the cable? What are the symptoms of a too tighten cable for the rear derailleur?
3. Overall, in practice, what would be the average failure rate of a well tuned SRAM Force 22 rear derailleur? Is a rate around 5-10% acceptable?
Thanks in advance,
R.
I noted I can usually shift up 1, 2 or 3 cogs at once with SRAM Force 22, depending on how much I move the shifter, but the questions are:
1. If I start from the smallest cog (11) and move the shifter full range, then it switches 4 cogs at once (from 11 to 15, for around 80% of cases), or it makes a 3 cogs shifting with failure (from 11 to 14, but unsuccessfully trying to lift the chain to the 15th cog, for around 20% of cases). Is this normal?
2. When shifting only one cog at once, I noted that I can solve the failures at the middle of the range (14 – 15 cogs) by tightening the cable. However: when should I stop tightening the cable? What are the symptoms of a too tighten cable for the rear derailleur?
3. Overall, in practice, what would be the average failure rate of a well tuned SRAM Force 22 rear derailleur? Is a rate around 5-10% acceptable?
Thanks in advance,
R.
09-26-15, 04:30 PM
#2
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Hello,
I noted I can usually shift up 1, 2 or 3 cogs at once with SRAM Force 22, depending on how much I move the shifter, but the questions are:
1. If I start from the smallest cog (11) and move the shifter full range, then it switches 4 cogs at once (from 11 to 15, for around 80% of cases), or it makes a 3 cogs shifting with failure (from 11 to 14, but unsuccessfully trying to lift the chain to the 15th cog, for around 20% of cases). Is this normal?
2. When shifting only one cog at once, I noted that I can solve the failures at the middle of the range (14 – 15 cogs) by tightening the cable. However: when should I stop tightening the cable? What are the symptoms of a too tighten cable for the rear derailleur?
3. Overall, in practice, what would be the average failure rate of a well tuned SRAM Force 22 rear derailleur? Is a rate around 5-10% acceptable?
Thanks in advance,
R.
I noted I can usually shift up 1, 2 or 3 cogs at once with SRAM Force 22, depending on how much I move the shifter, but the questions are:
1. If I start from the smallest cog (11) and move the shifter full range, then it switches 4 cogs at once (from 11 to 15, for around 80% of cases), or it makes a 3 cogs shifting with failure (from 11 to 14, but unsuccessfully trying to lift the chain to the 15th cog, for around 20% of cases). Is this normal?
2. When shifting only one cog at once, I noted that I can solve the failures at the middle of the range (14 – 15 cogs) by tightening the cable. However: when should I stop tightening the cable? What are the symptoms of a too tighten cable for the rear derailleur?
3. Overall, in practice, what would be the average failure rate of a well tuned SRAM Force 22 rear derailleur? Is a rate around 5-10% acceptable?
Thanks in advance,
R.
09-26-15, 04:53 PM
#3
Senior Member
Thread Starter
The "failure" is in the shifter, not the derailleur. The derailleur is stupid, it only does what the shifter tells it to. The shifter's instructions reflect the action of the user. If the user doesn't push the shift lever quite as far one time as he/she did the previous time, the result may be different
Yes, I agree, but only in a certain degree. This is not a "free" shifting mechanism, as we used 30 years ago when we had to manually adjust the accurate position of the shifter / derailleur. It is a clever indexing device.
If I move it to maximum starting from the 11 teeth cog, it makes one supplementary "click" and it jumps 4 cogs (or sometimes - 20% - fails). If I move it to maximum starting from any other cog above 11 teeth, it makes one less "click" and it jumps 3 cogs, as written in the manual. It looks to me somehow inconsistent, so I suspect a wrong setting that I can not identify.
As about the tension of the cable - I assume that there is a maximum that I should not exceed, but I can not identify it. Low tension leads to failures in shifting to the mid range - 14 - 15 teeth cogs. So, I increase the tension in the cable, but how much? Maybe I go too far and this creates other type of failures? How can I identify the right tension of the cable?
09-26-15, 04:59 PM
#4
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Thanks.
Yes, I agree, but only in a certain degree. This is not a "free" shifting mechanism, as we used 30 years ago when we had to manually adjust the accurate position of the shifter / derailleur. It is a clever indexing device.
If I move it to maximum starting from the 11 teeth cog, it makes one supplementary "click" and it jumps 4 cogs (or sometimes - 20% - fails). If I move it to maximum starting from any other cog above 11 teeth, it makes one less "click" and it jumps 3 cogs, as written in the manual. It looks to me somehow inconsistent, so I suspect a wrong setting that I can not identify.
As about the tension of the cable - I assume that there is a maximum that I should not exceed, but I can not identify it. Low tension leads to failures in shifting to the mid range - 14 - 15 teeth cogs. So, I increase the tension in the cable, but how much? Maybe I go too far and this creates other type of failures? How can I identify the right tension of the cable?
Yes, I agree, but only in a certain degree. This is not a "free" shifting mechanism, as we used 30 years ago when we had to manually adjust the accurate position of the shifter / derailleur. It is a clever indexing device.
If I move it to maximum starting from the 11 teeth cog, it makes one supplementary "click" and it jumps 4 cogs (or sometimes - 20% - fails). If I move it to maximum starting from any other cog above 11 teeth, it makes one less "click" and it jumps 3 cogs, as written in the manual. It looks to me somehow inconsistent, so I suspect a wrong setting that I can not identify.
As about the tension of the cable - I assume that there is a maximum that I should not exceed, but I can not identify it. Low tension leads to failures in shifting to the mid range - 14 - 15 teeth cogs. So, I increase the tension in the cable, but how much? Maybe I go too far and this creates other type of failures? How can I identify the right tension of the cable?
09-26-15, 05:14 PM
#5
Senior Member
Thread Starter
Yes, it could be the shifter. Maybe some imperfect setting. That's what I'm investigating. It might some kind of little tightening / loosening of a screw, but I don't know how to find it. It is not critical - I can always fix it by re-shifting when it happens, but I like things working as written in the manuals...
09-26-15, 05:22 PM
#6
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Yes, it could be the shifter. Maybe some imperfect setting. That's what I'm investigating. It might some kind of little tightening / loosening of a screw, but I don't know how to find it. It is not critical - I can always fix it by re-shifting when it happens, but I like things working as written in the manuals...
Last edited by alcjphil; 09-26-15 at 07:28 PM.
