Cycling Personal Area Network#

Connected device ecosystem used while riding the Canyon Grizl CF 8 Di2.

Network Diagram#

graph TB
    subgraph Bike["Canyon Grizl CF 8 Di2"]
        Di2["Shimano GRX Di2 Electronic Groupset"]
        Favero["Favero Assioma Pro MX Power Meter Pedals"]
        Varia["Garmin Varia RTL515 Radar Tail Light"]
    end

    subgraph Head["Handlebar"]
        Garmin["Garmin Edge MTB Bike Computer / GPS"]
    end

    subgraph Wrist["Wrist"]
        Watch["Apple Watch Ultra 1"]
        Watchlink["Watchlink ANT+ → BLE Bridge"]
    end

    subgraph Pocket["Pocket"]
        iPhone["iPhone 16 Pro Max"]
    end

    Shokz["Shokz OpenRun Pro 2 Bone Conduction Headphones"]
    
    Favero  -- "ANT+  ·  Power & Cadence"         --> Garmin
    Di2     -- "ANT+ / E-TUBE  ·  Gear & Battery"  --> Garmin
    Varia   -- "ANT+  ·  Radar Alerts"             --> Garmin
    Garmin  -- "ANT+"                              --> Watchlink
    Watchlink -- "Bluetooth LE"                    --> Watch
    Watch   -- "Bluetooth"                          --> iPhone
    iPhone  -- "Bluetooth"                          --> Shokz

Devices#

Bike#

Canyon Grizl CF 8 Di2 — Size Medium, 2026

On-Bike Components#

Garmin Edge MTB — handlebar-mounted head unit, primary data recorder
Shimano GRX Di2 — 1×12 electronic groupset
Favero Assioma Pro MX — dual-sided SPD power meter pedals
Garmin Varia RTL515 — radar tail light, seatpost mount

Bridge#

Watchlink — ANT+ (Garmin Edge) → Bluetooth LE (Apple Watch) bridge

Wearables & Carried#

Apple Watch Ultra 1 — wrist, independent GPS + workout recording
iPhone 16 Pro Max — jersey pocket, audio hub
Shokz OpenRun Pro 2 — bone conduction headphones

Protocol Summary#

Protocol	Frequency	Used By
ANT+	2.4 GHz	Favero → Garmin, Di2 → Garmin, Varia → Garmin, Garmin → Watchlink
Bluetooth LE	2.4 GHz	Watchlink → Watch, Watch ↔ iPhone
Bluetooth Classic	2.4 GHz	iPhone → Shokz (A2DP / HFP)
GPS L1/L5	1575 / 1176 MHz	Garmin Edge, Apple Watch Ultra 1

Data Flow#

Favero Assioma ──ANT+──────────────────────────────────► Garmin Edge MTB ──ANT+──► Watchlink ──BLE──► Apple Watch Ultra 1
Shimano Di2 ────ANT+/E-TUBE────────────────────────────►  (records .fit)                                       │
Garmin Varia ───ANT+───────────────────────────────────►                                                       └──BLE──► iPhone 16 Pro Max
                                                                                                                                  │
                                                                                                                                  └──BT──► Shokz OpenRun Pro 2