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Di2 6870 front mech trim adjustment

by nopants
Tue, Oct 13, 2015 21:50
10

Help! I can't adjust the trim on the front mech of my Di2 6870. I've set the inner and outer limit screws as per the manual, and put it in the big ring/largest sprocket combination. The red light on the junction box flashes when I press the lever but there is no movement. The rear mech works fine.

Could this be a firmware problem? On the Shimano site there is an update from January 15 (Version 2.6.0) that says it 'Fixed small bug of E-tube project adjustment' but this doesn't sound right to me.

If anyone has any suggestions I would be really grateful.

Cheers

N

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10 comments

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kev-s | 8 years ago
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Very odd then

 

Only thing i can suggest is plugging the bike in and making sure you have the most upto date firmware on each of the components then try adjusting the front mech via the software

 

Can you not borrow a laptop from someone for a hour to run the e-tube software?

 

If not then a trip to a good local bike shop, explain the situation and ask if they can update the firmware for you (its very easy to do even if they dont specialise in di2) cant see them charging you more than 30 mins labour for doing it

 

 

Avatar
Scrufftie | 8 years ago
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This website is really useful for Di2 owners, 

http://carltonbale.com/shimano-di2-everything-you-need-to-know/

There is a section on FD adjustment and there is an active Q&A section

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nopants | 8 years ago
0 likes

Thanks Kev. I tried it with the chain on the the big ring and big sprocket - as per the Shimano instructions. Interesting to know this works for you because it definitely doesn't for me.

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Martyn_K | 8 years ago
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Yup... you adjust the inside trim and the system automatically calculates the outside trim for when you are in the other front/ rear extremes.

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kev-s | 8 years ago
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Right a quick Google and a check on my bike and ive solved it

So to micro adjust the front mech, before you enter the adjustment mode make sure your on the big ring at the front and the big cog at the back

Press the button on the junction box as usual and you should be able to micro adjust the front mech

You must be in the gear setting s above, it wont work in any other combo and must be in those gears before you go into the adjustment mode

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kev-s | 8 years ago
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Yeah ive never managed to do it via the manuals way when i set up my first 11 speed di2 bike, ive built a few of them now and always have to do it via the e-tube software on the front mech

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nopants | 8 years ago
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Thanks again Kev,

I had seen this suggested, but am a bit wary. It starts becoming time consuming and intimidating for a luddite like me...

The Shimano Dealers Manual for the 6870 (DM-UL0001-00-ENG) shows the front mech it is adjustable from the lever (page 57). It is very strange this is not the case!

I'm injured and off the bike at the moment, so this is the moment to try.

Cheers,

N

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kev-s | 8 years ago
0 likes

Use this free trial to run windows programs on your mac

http://www.vmware.com/uk/products/fusion

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nopants | 8 years ago
0 likes

Kev, that's really helpful, thank you.

I have just had a look at the e-tube site, and it doesn't look like it is compatible with a Mac. This is going to get interesting...

Avatar
kev-s | 8 years ago
0 likes

You cant adjust the trim on the front mech by using the shifter like you do the rear mech

You need to connect your bike upto the your pc using the e-tube battery charger

Then using the e-tube software (free to download from shimano) you can make adjustments to the front mech

Its simple to do and takes just a few mins

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