4iiii Viiiiva Heartrate Monitor belowcost B-RAD Base component is required

B-RAD Base component is required

Reduces "dive" while braking or pushing hard

And while the 303 XPLR SW is built big

To the delight of riders and mechanics alike

Rim Axle Type Bolt-on Depth 18mm Rim inner width range 0-21

4iiii Viiiiva Heartrate Monitor belowcost B-RAD Base component is requiredThe Viiiiva is so much more than a heart rate monitor. The Viiiiva can act as an ANT+ to Bluetooth bridge so you can broadcast your ANT+ devices to your Bluetooth devices all through your Viiiiva heart rate monitor. The Viiiiva also records every second of your workout, including data from paired ANT+ devices. If something happens to your head unit or watch the Viiiiva will keep your data safe, up to 65 hours of it. Its Easy Tap to pair connection