Menampilkan postingan dari Desember, 2017

Dahon MuEX: 1x11 Drivetrain - Installation

Finally, after preparing the 11-32T 11 speed cassette, the short cage Ultegra Di2 rear derailleur, and the front single Ultegra 6800 crankset with Wolf Tooth 48T chainring, it is time to assemble all these new components to the Dahon MuEX!

It was already set up with a 2x10 speed Ultegra/XTR Di2 system, so there is no need to start from scratch. The advantage of having a Di2 setup is that it is modular. So if you just need to upgrade the rear derailleur, just unplug and replace the rear derailleur, and you are done! No need to change the shifters or the Di2 wires.

In this case, since I am going from a front double to front single drivetrain, the front derailleur can be removed, along with the left side shifter. The new Di2 wiring layout is shown below.

New 1x11 speed Di2 wiring layout. No more front derailleur or left side shifter.
Once everything is connected, the Di2 setup box SM-PCE1 can be connected to the system to update all the Di2 components. This ensures that the latest firmware i…

Dahon MuEX: 1x11 Drivetrain - Wolf Tooth 48T Chainring on Ultegra 6800 Crankset

After successfully modifying the 11 speed 11-32T cassette and the Ultegra Di2 rear derailleur, the only component remaining that needs to be prepared is the front single crankset.

The Dahon MuEX currently has a 2x10 speed drivetrain, and it is using the Ultegra 6700 53/39T crankset that is designed for 2x10 speed. Converting it to a single chainring is easy, as I will just need to get a narrow wide chainring that has a 130mm BCD to fit the crank arm.

However, I decided to use the newer Ultegra 6800 crankset from the Canyon Endurace instead. Function wise, there should be no difference regardless of the crankset used. In this case I prefer to use the Ultegra 6800 crankset as it will be of the same series as the Ultegra Di2 RD-6870.

Picture taken from a magazine. Looks good!
What I will require will be a narrow wide chainring, to replace the double chainrings on the Ultegra 6800 crankset. As previously tested successfully, the Wolf Tooth narrow wide chainring is an excellent choice. The 4 a…

Dahon MuEX: 1x11 Drivetrain - Ultegra Di2 RD Cage Modification

This project's objective is to convert the drivetrain on the Dahon MuEX from 2x10 speed to 1x11 speed. The most challenging part of this project is to install the 11 speed 11-32T cassette onto the 10 speed freehub body of the Kinetix Pro wheelset. With that successfully done, it is now possible to continue this project.

As the rear cassette gets upgraded from 10 to 11 speed, the Di2 rear derailleur also needs to be upgraded to match the same number of speeds. Unfortunately the rear derailleur cannot be simply reprogrammed to work for 11 speeds, therefore a change is necessary. The current 10 speed Ultegra Di2 RD-6770 will be replaced with the newer 11 speed Ultegra Di2 RD-6870 from the Canyon Endurace.

This Ultegra Di2 RD-6870 is the mid cage version, as it was chosen to be compatible with the 11-32T cassette. The more common short cage version can only work properly up to 28T sprockets.

Not only is the cage length different, the design of the linkage and other parts are also slightl…