Note to Current Customers:
We are doing our very best to communicate with you directly so watch for emails from us. It is important that we know information on which crank you have (i.e. crank type and model name), so that we can process your order easily and quickly. If you have not yet provided us with this information, please email us your details at

Note to New Customers:
To ensure your compatibility with PRECISION, please view the compatibility chart on the product page.


Can my left-sided powermeter be upgraded to a dual-sided unit?

If a PRECISION Powermeter is installed on a compatible crank arm, you can upgrade your existing PRECISION Powermeter to a dual-sided PRECISION PRO.  Please refer to our crank arm compatibility list for PRECISION PRO.

What conditions can I use PRECISION in?

PRECISION is waterproof and dustproof, and maintains accuracy in temperatures between 0°C and 50°C. PRECISION carries an IPX7 rating.

How does my local bike shop become an authorized PRECISION reseller?

If there is a bike shop in your area that you’d like to see authorized via Dealers can also apply here.

How do I know if I have the current PRECISION firmware version?

To receive the latest firmware version on your PRECISION Powermeter:

  1. Ensure you are running the latest version of the 4iiii App on your iOS or Android device.
  2. Connect to your PRECISION Powermeter using the latest version of the 4iiii App.
  3. Follow the prompts to install the latest version of the PRECISION firmware using the 4iiii App.

Is PRECISION compatible with carbon cranks?

PRECISION is compatible with several popular carbon cranks. Our engineers are working towards making more cranks compatible. We will update the PRECISION compatibility list as more cranks are added.

Can PRECISION be moved from bike to bike?

A crank arm with PRECISION installed can be moved to a different bike, assuming that it has a compatible crank installed, and crank arms of the same length.  The PRECISION pod cannot be removed from a crank arm and placed onto a different crank arm without destroying the power sensor.

PRECISION Troubleshooting

My PRECISION Powermeter is running the latest version firmware. What do the numbers on my ANT+ power display indicate after I zero (calibrate) my powermeter?

10 – Good, ready to ride

20 – Unstable data (bike not stationary)

30 – Low battery (less than 10%)

50 – Calibration error – contact support

99 – Communication error – try reconnecting with the 4iiii App of contact support

Why can’t I pair or zero my PRECISION with my Garmin head unit?

  1. Try removing your PRECISION Powermeter from the sensor list and repairing it.
  2. Make sure your PRECISION is awake by spinning the crank several times before pairing/ zeroing.
  3. Make sure you don’t have a dead battery. You can check the battery status on the 4iiii App.

Why do I see cadence numbers and no power numbers (or extremely high power numbers)?

Check that you are running the latest firmware on your PRECISION Powermeter.  This information is displayed on the iOS and Android compatible 4iiii App when you connect to your PRECISION Powermeter.

Once you are running on the latest firmware, zero (calibrate) your powermeter and you are good to go. If you are still experience problems, please contact support at

How do I zero, or calibrate my PRECISION powermeter?

To zero your powermeter, unclip from yoru pedals, dismount and make sure your PRECISION is awake by turning the crank a few times. Ensure that the bike is stationary, and upright (held in a trainer, or leaned against a wall) and make sure that the left crank arm is pointing straight down. Once ready, use the “Calibrate” option in your bike computer or on the 4iiii App to complete the procedure.

When should I zero, or calibrate my PRECISION powermeter?

To get the highest accuracy out of your PRECISION Powermeter, we recommend that you zero or calibrate your PRECISION Powermeter at the beginning of your ride.

If your bike has been stored at a very different temperature than what you are riding in, say from a hot car or garage to the cool outdoors, you should give your bike a few minutes to reach riding temperature before you zero or calibrate your powermeter.

How durable is PRECISION? Will it need to be recalibrated if my bike falls over or will the module get knocked off?

We have designed PRECISION to be placed in a protected area. It’s practically impossible to knock it or hit it on the drive side. The left side is more open but still very well protected. We have not experienced any issues with durability.

How does PRECISION manage shock and false power readings when riding over bumps and terrain?

PRECISION has integrated accelerometer technology. Our PhD gurus write and constantly improve algorithms that are able to distinguish bumps from true power. Currently, our over-the-air upgrade feature gives you improved algorithms and features for free.

Are iOS and Android supported?

Yes! The 4iiii app will provide basic visibility to the power data to ensure that your PRECISION is connecting properly. You can use your power app of choice on your smartphone or head unit.

Is PRECISION Bluetooth Smart and ANT+ compatible?

Yes! PRECISION can communicate with any Bluetooth® or ANT+ enabled device or head unit.

What can I do if I’m having trouble with my PRECISION powermeter?

If you can’t find what you’re looking for in this FAQ, you can drop us an email at and we’ll give you a hand.