4iiii Precision 2.0 3D Power Meter - 105 R7000 - Black

A durable lightweight design and compatible with ANT+ and Bluetooth Smart


You’d be hard pressed to find a pro cyclist not training with a power meter these days, even among amateurs they are common place. For good reason too, power meters are easily one of the most effective ways to enhance your cycling performance. Plus, the simplicity and affordability of 4iiii’s Precision 2.0 power meter, installed on Shimano’s 105 R7000 crank, means unlocking your wattage potential has never been easier.

Accurate, Lightweight, Reliable

In the Precision 2.0, the Canadian sports-tech company measures power output, through a proprietary tri-axel strain gauge in the left crank arm, as you pedal. What’s remarkable is 4iiii offers an industry-leading accuracy of +/- 1%, but the device’s presence adds only 9 grams to the standard weight of a crank arm. Even the most gram conscious bike riders’ can’t quibble with that!

Combining accuracy, low weight, and a low cost the Precision 2.0 power meter is easily one of the most cost effective, accurate, and reliable ways to start training with power. What’s more, the only difference between this product and a more expensive Dura-Ace version is the crank arm it’s attached to, meaning you are literally getting pro-level technology at a more palatable price point.

The Set-Up

The device couldn’t be simpler to install either. It arrives pre-fitted to the inside of a brand-new 105 R700 crank arm, all that’s required from you is fitting it to your bike like a regular crank arm. No special tools or elaborate configuration required. What’s more, being located on the inside of the crank arm, the Precision 2.0 is barely noticeable. Add in a ride-time battery life of over 100 hours, and it may be quite some time before you ever do have to pay it any attention. Battery life can be monitored via the iOS and Android app, and when battery replacement comes around, it’s simply a case of replacing the 2032 coin-cell battery, no tools required.

As you would expect from a modern piece of cycling tech, it is compatible with most ANT+ and Bluetooth capable devices, meaning you’ll be able to sync it to your chosen bike computer, indoor trainer, and/or laptop/PC, and use it for training and racing indoors and outdoors.

Whether you’re merely curious about the watts you’re cranking out or you’re looking to pace yourself up your favorite climb, then the 4iiii Precision 2.0 will make a great addition to your bike.

Product Features

  • Lightweight, weighing only 9 grams
  • 3D technology equipped power meter
  • Power data accurate to +/- 1%
  • Compatible with ANT+, Bluetooth head units, smart phones, PCs, indoor trainers
  • User-friendly app
  • Easy set-up and maintenance
  • 100+ riding hours on 2032 coin cell battery
  • Battery life indicator via 4iiii companion app
  • Compatible with all Shimano road crank sets
  • 105
  • Road
  • 4iiii

How long will it take to arrive?

Please check the stock availability notice on your item when placing your order. This item is:

How will I know it has been sent?

You will receive an email to confirm when your item has been sent.

You can also check the status of your order and individual items by accessing My Account details and following the prompts.

Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.

It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.

If I'm not completely happy with my item?

Please see our returns policy.

Customer Reviews

Overall Rating : 4.88 / 5 (25 Reviews)
  • 22 5 star reviews
  • 3 4 star reviews
  • 0 3 star reviews
  • 0 2 star reviews
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Top Customer Reviews

Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.


Great liitle power meter, works perfectly and connects to my device within seconds,, I would not be without one..

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Great product (great customer service too from both 4iiii and Probikekit)

Bought the first 4iii Precision 2.0 105 power meter in July, numbers were a bit strange initially but accepted it as it was my first forte in power meters in the real world (I had used a TacX Flow prior). After doing more rides (indoor with the TacX Flow and outdoor) and some trouble shooting with 4iiii (Micheal - Great guy thank you so much for the help), we came to the conclusion that the PM was defective and a RMA was actioned. Process with Probikekit to return the defective product was very straight forward as well, all postage (Royal Mail 48) paid by them. Received a new PM, fitted, works like a charm and the numbers make sense! Great product and service for the price point, an excellent and economical way to get into measuring power in the real world! Thank you to both 4iiii and Probikekit, one happy customer.

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Accurate & Affordable Power Meter

My first choice was to go with power meter pedals but the cost of even one sided is more than double the cost of this easy to install 4iii single sided. Glad to now have power readings on outdoor rides now. Pairing a breeze with Zwift and 4iiii app.

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First Powermeter

For my first ever PM, it was easy to setup and get started. Within 30min of delivery, it was on its first ride. Can't wait to make and break some personal records.

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Great product

Have had this power meter for over a year and I have found it to be great. The feed to my bike computer connects easily and I do not find that it drops ever. Highly recommend if you are looking to bike with power

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Delighted with price and results

I didn't think that I needed one of these, but the reducing price and the persistence of cycling friends tipped the balance. Now I'm hooked and it is an essential tool. First I have shifted from heart rate training to power and am finding huge benefits from the results. Secondly I am now using group ride apps and enjoying my winter indoor training much more. The 4iiii Precision unit couldn't be simpler to setup and use. If you have a gravel bike be careful to check the clearances. It has integrated with everything that I use and a pleasant surprise was that it clicks straight in with my Polar V650. Single side does not give me any apparent limitations in data.

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I like the power meter it was a good price and works well and was easy to fit and set up. It connected to my Wahoo Bolt in a few seconds.

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Can`t say anyhthing, if u r looking for a cheap and reliable power meter don`t miss this one.

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PowerMeter 4iiii

I was so pleased with the first one that I bought another for my gravel bike. At l last I have power figures for my off road activities as well as on road. No more Strava estimates. 5 minutes to fit and a small spacer gave chainstay clearance on my Canyon Grail on Ultegra crankset.

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PowerMeter 4iiii

Finally I bit the bullet. The cheapest option was a 105 single sided left crank for my Ultegra group set. I can't say how delighted I am. My reservations about single sided have gone completely. I've adjusted the calibration to account for a discrepancy in my left leg output and to be honest it's just what I need. Fitting and setting up were super easy. Battery life seems good and it's no problem carrying an emergency back up CR 2034 as they weigh nothing. It took one spacer to give me chain stay clearance on my Canyon Ultimate. I have instant feedback on my effort and now resist the desire to go harder than I should during recovery rides. I also get an immediate comparison between my heart rate and my power and can see change over time. Why didn't I do it before?

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