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Stages Cannondale Hollowgram Si Power Meter

Josh Matthew May 23, 2024
4.75 out of 5 based on 12 customer ratings
(12 customer reviews)

Original price was: $409.99.Current price is: $348.99.

Save: 15%

Stages power for your Cannondale Hollowgram Si crank!

Please see our note below on Stages Rider Support

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Stages Cannondale Hollowgram Si Power Meter

The Stages Cannondale Hollowgram Si Power Meter is a BB30 compatible upgrade for existing Cannondale 2014 Hollowgram Si model cranks. This power meter will also work with Hollowgram SISL2 model cranks. The power meter features +/- 1.5% accuracy and 200 hours of battery life. Stages power meters run off the popular CR2032 battery and feature tool free battery replacement. In addition, it is extremely lightweight – adding only 15 grams to the weight of the crank arm. The power meter is compatible with both ANT+ and Bluetooth SMART devices, which means you can use your favorite bicycle computer as well as a smartphone or tablet.

The new Stages Generation 3 power meter features radio antennas that are 6x more powerful than the previous version. This means better compatibility with both bike computers and watches. The new versions also feature improved accuracy and have an LED indicator light on the housing for improved ease of use.


~Stages Rider Support~

It has come to our attention that Stages no longer has the resources to offer product support or warranty services. That said, if purchasing a Stages product, we do our best to answer product or troubleshooting-related questions. Knowing this, please shop Stages products assuming there may not be any future manufacturer support. Please note that Power Meter City cannot facilitate any warranty services.


Key Product Details


This power meter is compatible with 2014 or newer Cannondale Si, Hollowgram Si and Hollowgram SiSL2 cranks. It is also compatible with the Cannondale One crankset. Please note the shape of the Stages power meter is a bit different, a cosmetic difference only. Please see Compatibility tab for more information.

Power Measurement:

This Stages power meter measures left leg power and doubles the value to account for both legs (assumes both legs are generating the same force).

Key Features:

Affordable, accurate to within +/- 1.5%, lightweight at only 15 grams of added weight, 200+ hours of battery life, CR2032 user-replaceable battery, ANT+ and Bluetooth compatible, easy to install. See Specs tab for more information.

Advice From Our Staff:

Stages left side crank arms are some of our best-selling units. They are affordable and easy to install. The one consideration is they only measure left leg power compared to some other power meters that measure power from both legs (those versions usually cost more however).


Options For This Power Meter

Crank arm lengths: This power meter is available in the following crank arm lengths:

  • 170 mm | 172.5 mm | 175 mm


Crankset: This power meter is compatible with 2014 or newer Cannondale Si, Hollowgram Si and Hollowgram SiSL2 cranks. It is also compatible with the Cannondale One crankset. Please note the shape of the Stages power meter is a bit different, a cosmetic difference only.

Check Frame Clearance: Crank-arm based power meters like this one attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance between the left crank arm and the chainstay - and that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below.

If you find that you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need.

The clearance between the frame and left side power meter crank arm

Stages Cannondale Hollowgram Si Specs

NameStages Cannondale
Bike TypeRoad and MTB
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredLeft only
Independent Left/Right MeasurementNo
Crank Arm MaterialAluminum
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.5%
Automatic Temp. CompensationYes
Weight15 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life200+ hours
Method of Cadence MeasurementAccelerometer
Warranty1 year

In the Box

  • Stages power meter
  • 2032 coin cell battery
  • Quick Start guide

Tools Needed for Installation

You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.

  • 10 mm Allen key

Common Questions and Answers

Question: Will the Stages Cannondale Power Meter work on a Cannondale One crankset?

Question: How do I determine what length my current cranks are so I can make sure I get the same size?

  • Your crank arm length should be printed or stamped on the inside of the left crank arm, usually near the pedal end.

End of crank arm showing crank arm length

12 reviews for Stages Cannondale Hollowgram Si Power Meter
  1. Jon (verified owner)

    On sale, this is an SI crank arm AND a power meter for the MSRP of the crank arm alone! I recently cracked my crank arm and that power meter was unsalvageable. I found this amazing deal at Power Meter City and fixed both problems for half price. Shipping and communication from PMC was first class. Will buy from them again, no question.

  2. Bob G (verified owner)

    I ride and race but never wanted to spring for a PM due mostly to cost and trained by avg speed and HR. Zwift actually got me tuned in to the advantages of knowing and using power. With the fantastic price at PMCity I sprang for one for my training/everyday bike and enjoyed having it so much I bought another one for my race bike. Having power and w/kg on my headunit throwing in a few intervals on a ride makes it more enjoyable and especially when riding into a wind where avg speed suffers you can see that you are still putting out watts.
    The only thing that threw me, and this is for the Cannondale Hollogram, was that the Stages PM crank is self-extracting and both my bikes OEM EVO and CAAD12 are not. This turned out to not be an issue at all but confused me a first when I looked at what I had and what the PM was.

    • Power Meter City

      We’re absolutely delighted to receive your 5-star review, Bob! Thank you for choosing Power Meter City and for your kind words. We hope you will continue to enjoy your Stages power meter! We are here if there is anything else we can help you with!

  3. Don (verified owner)

    Great price and very fast shipping! Those always draw you in.
    It’s their customer service that will bring you back. They always
    follow up. I’d buy again!

    • Power Meter City

      Looking forward to doing business with you again, Don. Thank you for this amazing review! We are here if there is anything else we can do!

  4. Jeff (verified owner)

    Awesome experience – had what I needed in stock, fast shipping, easy installation. Love tracking actual power in every ride now, I’m addicted!

    • Power Meter City

      Thanks for taking the time to leave an amazing review Jeff – looks like you are enjoying your new power meter. We are here if there is anything else we can do!

  5. Andy (verified owner)

    I bought the stages power meter from power meter city purely for the astonishingly low price compared to shops here in Australia, a huge saving, and the speed it was delivered even during a pandemic was great, within 5 days, amazing service. Now, I’m new to power meters and bike maintenance so got a mechanic to install, that’s fine. My only issue since is that it doesn’t calibrate very well, takes 5 or 6 failed attempts before it completes, secondly I’ve experienced twice the power and cadence disconnect/drop out whilst on the indoor trainer and once outdoors so that’s been frustrating. I’m hoping this is my uneducated self missing a few tricks to get full efficiency and hold out hope this will change. Any pointers would be much appreciated.

    • Power Meter City

      Hi Andy, thanks for the review. I’m glad we could get you a Stages power meter on good terms! Regarding calibration, it shouldn’t take multiple attempts. Please make sure the firmware on both the power meter and bike computer is up to date. If you are still experiencing issues, please let us know!

  6. Karl (verified owner)

    Well impressed with the power meter and the excellent service I received from these guys I’m UK based got it delivered within 3 days absolutely superb customer service highly recommended cheers ????????????????

    • Power Meter City

      Hi Karl. Thanks for this kind review on your Stages Cannondale Hollowgram Si Power Meter. Let us know if there is anything else we can do!

  7. James

    I ordered the wrong power meter for my Cannondale and Josh at PMC helped me swap it for this one. I’ve had the meter on my bike for about 3 weeks and it’s been working well. Thanks for the awesome service PMC!

    • Power Meter City

      Hi James. Finally you got the perfect power meter on your Cannondale! We also want to thank you for being a great customer! We are here if there is anything else we can do!

  8. WM (verified owner)

    This power meter was my first tool for power-based training and was an easy choice given the compatibility with my Cannondale and the price point. It’s been great so far. Both Stages and Power Meter City have provided top notch, responsive support. Overall, I would definitely recommend it.

    • Power Meter City

      Hi WM. We really appreciate this! Just like what the others say this power meter rocks! We hope you continue to enjoy them and we are here if there is anything else we can do!

  9. Achmad Hamid (verified owner)

    First class customer service… They do international shipping and super fast! Thank you Josh and Power Meter City team..

    • Power Meter City

      Hi Achmad. Thank you for this amazing review! We want to thank you too for being a great customer – we are here if there is anything else we can do!

  10. Ken (verified owner)

    I got this power meter since it had good reviews and seemed like a good option for my Cannondale. Shipping was fast and installation was a breeze. The power meter works well for what I bought it for, which is pacing up climbs or any smooth efforts up to about 1500W at high cadence. I was very disappointed to discover that this power meter drops out almost every time I stand up to pedal at above 1200W, and sometimes when I’m sitting down at over 1500W. It stays dropped out (cadence = 0) until I sit back down at < 1400W, sometimes with more than a 10 second dead period.

    I'm working with Stages Tech support to try to resolve the issue. They have been very responsive so far, but the latest firmware update that was supposed to fix my issue by using a magnet to measure cadence instead of analyzing your pedal stroke internally did not solve my problem. Essentially, their algorithm analyzes the torque vs. crank position I'm putting down, and says I'm not pedaling in high-torque situations. Since the issue seems algorithmic in nature, I would give them a decent chance of fixing the issue, especially since they have external cadence measurement capabilities built in. If they are able to resolve the issue, I will update this review.

    I have issues in the following regions at continuous power output (not an exhaustive list; measured by slowly increasing power until it drops out)
    1. Over 450W at ~40 rpm to get up a steep climp
    2. Over 1200W at ~80 rpm standing to crank up a kicker
    3. Over 1500W at up to 130 rpm seated or standing

    If you're over 100kg and can crank out some watts, this may not be the power meter for you (I don't know if other options would be better). If you have a more typical cyclist build, I'm sure it will be totally fine.

    • Power Meter City

      Hi Ken. Thanks for the review. I’m glad to hear you are enjoying the power meter. Regarding the drops, I can’t say we have seen that before – on any Stages power meter for that matter. However, if there is anything at all you need from us to get things figured out, please let us know!

  11. Patrick (verified owner)

    I ordered this power meter after having had problems with another, far more expensive brand. First of all I have to say that the ease of ordering and the speed of delivery from power meter city is just fantastic. It took me five minutes to install this on my Cannondale and then I was off out on a 174 kilometer ride. Through wet, cool and scorching hot conditions, this meter has given me good, accurate data. Battery life is really good too. I am a very happy customer.

    • Power Meter City

      Hi Patrick. Thanks for the great review on your Stages. We like nothing more than happy customers! Please let us know if there is anything else we can do.

  12. Timothy Hall (verified owner)

    Purchased the Stages power meter for Cannondale as a replacement for another brand that just didn’t work out. Quick shipping. Easy installation. Easy calibration. Works well with my Wahoo Elmnt computer. And it works. Every time. Provides accurate (or as accurate as can be for single sided) measurements. It has made my limited training time more efficient. Customer service has been excellent as these guys went out of their way to make me happy. Would surely purchase from PowerMeterCity again.

    • Power Meter City

      Hi Timothy. Thanks for the awesome review and glad we found something that works right for you. We’re here if you need anything else!

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