External Battery Mount

External Battery Mount

Non-series components BM-DN100-S, BM-DN100-L, BM-DN-100-I

The BM-DN100 external battery mount lets you use the older generation SM-BTR1 on your bike and take advantage of Synchronized Shifting - this battery mount contains updated hardware that enables Synchro-shift. If you cannot fit the BT-DN110 internal battery in your frame, this external mount and SM-BTR1 is what you'd use.

It is available in three versions, so you will probably be able to find one that suits your bike. The BM-DN100-S is the short version, supporting internal/external wiring. The BM-DN100-L is the long mount while BM-DN100-I is a long mount meant for internal cable routing. Have a look at the BM-DN100 different sizes pdf for more information.

Affiliate Links

Using the affiliate links to purchase anything earns the site a small commission, at no additional cost to you.


Use the long version if you need to mount this on the down tube and have the space for it. T

he long mount lets you use an external battery and a bottle cage.

The short mount is meant for small frames or frames that cannot accommodate the long mount.

All three versions are fastened using M4 x 10mm (or 16mm) screws.


  • Model code: BM-DN100-S, BM-DN100-L, BM-DN-100-I
  • Series: Non-series components (NON)
  • Weight: 50g
  • Speeds: 11
  • Battery: SM-BTR1
  • Charging port: No
  • Charger: SM-BCR1

Related components

View the External Battery (SM-BTR1)


External Battery

View the External Battery Charger (SM-BCR1)


External Battery Charger

View the Frame/Handlebar Junction (EW-RS910)


Frame/Handlebar Junction

View the Below-the-stem Junction A (SM-EW90-A, SM-EW90-B)

SM-EW90-A, SM-EW90-B

Below-the-stem Junction A

Manuals & other documents

More images