DI2 adjustment on new frame
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DI2 adjustment on new frame
HI ,
i moved Ultegra R8050 groupset to a different frame , went through the steps in Ultegra manual , only problem is on big ring/smallest sprocket ..
it gives like a wiggle sound "rather than friction or rub" , which i can feel when rotating crank by hand ..
i've tried adjusting b-tension screw , it didn't help , high limit of RD is not the problem either ..
Note : chain is same length as it was on old frame as both frames have same chainstay , i did the sizing as per Shimano manual method "add 1 to 3 links when chain on big ring/big sprocket"
Any Ideas ?
i moved Ultegra R8050 groupset to a different frame , went through the steps in Ultegra manual , only problem is on big ring/smallest sprocket ..
it gives like a wiggle sound "rather than friction or rub" , which i can feel when rotating crank by hand ..
i've tried adjusting b-tension screw , it didn't help , high limit of RD is not the problem either ..
Note : chain is same length as it was on old frame as both frames have same chainstay , i did the sizing as per Shimano manual method "add 1 to 3 links when chain on big ring/big sprocket"
Any Ideas ?
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My only thought is that Di2 is known for not liking big ring, small cog combo, 2nd smallest cog is an issue as well. My system locks those out unless I cheat and set it up as a crank and/or cassette that I’m not really using - 53/39 crank I think it likes. So maybe the R derailer is wanting to shift the chain to a larger cog.
These are E-Tube settings, did you change anything during the swap ?
These are E-Tube settings, did you change anything during the swap ?
Last edited by Steve B.; 02-20-20 at 11:30 AM.
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My only thought is that Di2 is known for not liking big ring, small cog combo, 2nd smallest cog is an issue as well. My system locks those out unless I cheat and set it up as a crank and/or cassette that I’m not really using - 53/39 crank I think it likes.
These are E-Tube settings, did you change anything during the swap ?
These are E-Tube settings, did you change anything during the swap ?
same group "with crank and cassette" was working fine on the previous frame ,
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I've never heard of Di2 not liking big ring small cog.
OP please clarify what you mean by "wiggle sound" otherwise you are going to be subjected to everyone's assumptions of what you mean.
For example, based on your description, my assumption is you are "feeling" the chain sticking slightly to your upper jockey wheel, which in fact is an alignment problem.
OP please clarify what you mean by "wiggle sound" otherwise you are going to be subjected to everyone's assumptions of what you mean.
For example, based on your description, my assumption is you are "feeling" the chain sticking slightly to your upper jockey wheel, which in fact is an alignment problem.
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I already adjusted index and limits as well as , chain is not rubbing or bouncing on sprocket ...
when rotating crank by hand on high RPM , i sense like a vibration , sound is more like something is drivetrain i wiggling/vibrating , rather that the sound of friction/rub when indexing is not adjusted ..
that's only on big ring / smallest sprocket "12 teeth" , it's less on the 2nd smallest sprocket "13 teeth" and not noticed on larger sprockets
when rotating crank by hand on high RPM , i sense like a vibration , sound is more like something is drivetrain i wiggling/vibrating , rather that the sound of friction/rub when indexing is not adjusted ..
that's only on big ring / smallest sprocket "12 teeth" , it's less on the 2nd smallest sprocket "13 teeth" and not noticed on larger sprockets
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I already adjusted index and limits as well as , chain is not rubbing or bouncing on sprocket ...
when rotating crank by hand on high RPM , i sense like a vibration , sound is more like something is drivetrain i wiggling/vibrating , rather that the sound of friction/rub when indexing is not adjusted ..
that's only on big ring / smallest sprocket "12 teeth" , it's less on the 2nd smallest sprocket "13 teeth" and not noticed on larger sprockets
when rotating crank by hand on high RPM , i sense like a vibration , sound is more like something is drivetrain i wiggling/vibrating , rather that the sound of friction/rub when indexing is not adjusted ..
that's only on big ring / smallest sprocket "12 teeth" , it's less on the 2nd smallest sprocket "13 teeth" and not noticed on larger sprockets
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Possibly they changed the E-Tube software, but when I set up my system 2 yrs. ago, trying to use a 34/50 crank and about any cogset, 11-23, 12-25, the system would not allow a shift to big ring/small or next cogs. This was with Synchro turned off. You could cheat and set it up with certain crank/cassette combos. I know telling E-tube I had a 39/53 crank allowed those shift combos with a 12-25.
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Possibly they changed the E-Tube software, but when I set up my system 2 yrs. ago, trying to use a 34/50 crank and about any cogset, 11-23, 12-25, the system would not allow a shift to big ring/small or next cogs. This was with Synchro turned off. You could cheat and set it up with certain crank/cassette combos. I know telling E-tube I had a 39/53 crank allowed those shift combos with a 12-25.
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also tried this equation below , in both methods chain length shouldn't be shorter
"chain stay legnth by inch *2 + cranks teeth count/4 + largest sprocket count/4" + 1 ===> gives number of full links
using b-tension to tighten chain a little didn't help also ..
Regarding E-tube , i already have 53-39 crank .. so possible nothing i can do there
Last edited by hythamfekry; 02-20-20 at 02:07 PM.
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chain legnth was my first suspect , however chain is already 106 link , chain stay is 40.5 cm , i tried Shimano method "placing chain on big ring/big sprocket + 1 to 3 links
also tried this equation below , in both methods chain length shouldn't be shorter
"chain stay legnth by inch *2 + cranks teeth count/4 + largest sprocket count/4" + 1 ===> gives number of full links
using b-tension to tighten chain a little didn't help also ..
Regarding E-tube , i already have 53-39 crank .. so possible nothing i can do there
also tried this equation below , in both methods chain length shouldn't be shorter
"chain stay legnth by inch *2 + cranks teeth count/4 + largest sprocket count/4" + 1 ===> gives number of full links
using b-tension to tighten chain a little didn't help also ..
Regarding E-tube , i already have 53-39 crank .. so possible nothing i can do there
Now what you need to do is be able to identify noises associated with other things such as poor indexing which causes noise from the chain rubbing against the cogs, etc... If all that checks out, then what I think you are hearing is what I described above. Also make sure you are using good chain lube and your chain is lubed properly. A poorly lubed chain will be noisier than one that is properly lubed.
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Possibly they changed the E-Tube software, but when I set up my system 2 yrs. ago, trying to use a 34/50 crank and about any cogset, 11-23, 12-25, the system would not allow a shift to big ring/small or next cogs. This was with Synchro turned off. You could cheat and set it up with certain crank/cassette combos. I know telling E-tube I had a 39/53 crank allowed those shift combos with a 12-25.
You can "cheat" this using the method you described, or you could disable 'gear position control' in the e-tube software.