Try this out:
Print & cut out this Xena Fit Template and place against the front brake rotor. It will tell you which Xena disc locks will fit the R3. Make sure you set your printer preferences to 100% scaling......Paper size A4 with "Fit to Page" box un-checked/cleared.
http://www.xenasecurity.com/customer-care/xena-disc-lock-fitment-guide/xena-lockfitter/
Add the Xena XCA15 Chain Adapter and a hexagonal hardened link chain for added security. It currently fits the XX-15 top-of-the-line lock only, which Does Not Fit the R3. Not sure about the Bluetooth lock compatibility.....

If you can wait a bit, Xena is coming out sometime soon with a Bluetooth-enabled lock and App for Android and iOS, and it also has GPS tracking capability and shock and tilt/movement sensor, etc.
https://www.youtube.com/user/XENASecurity?feature=mhum