PowerTap C1 Chainrings

  • Only dual-sided power meter at this price point.
  • Conveniently mounts to the crank on your bicycle.
  • Motion-based electronics eliminates additional sensors.
  • Compatible with a wide range of alloy and carbon cranks.
    View our compatibility chart for more info.


  PowerTap.com orders ship within one business day.


Learn more about the C1 Chainrings >

$199.99 - $699.99

SKU: 30420


Bluetooth Smart
ANT+


THE ONLY THING THAT SHOULD NEED MODIFYING IS YOUR PAIN THRESHOLD.

The C1 chainring is a full featured, crank-based power meter that features dual-sided measurement. The FSA-made, one-piece chainring design provides added stiffness for shifting no matter the terrain. Available 53/39, 52/36 and 50/36 chainring tooth options for 5 bolt, 110 BCD cranks, the C1 mounts to existing hardware on the bike. Additionally, dual band ANT+ and Bluetooth SMART connectivity make the C1 an obvious choice for riders looking for more features and better value.

Learn even more about the C1 Chainrings.

  • Crank Interface: 5 bolt, 110 BCD compact
  • Connectivity: ANT+ and Bluetooth SMART
  • Tooth Combinations: 50/36, 52-36 and 53/39
  • Firmware Updates: Over the air
  • Added Weight: About 150 grams
  • Battery: CR2032
  • Battery Life: 200 hours

PowerTap 2 Year Warranty

We're proud to offer a 2 year warranty worldwide on all of our PowerTap branded power meters.

2 year warranty worldwide

REVIEW SNAPSHOT®

by PowerReviews
 
4.3

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

57%

of respondents would recommend this to a friend.

Pros

  • Easy to use (3)

Cons

No Cons

Best Uses

No Best Uses
    • How would you rate the quality of this product?:
    •  
    • How would you rate the value of this product?:
    •  
    • Describe Yourself:
    • Competitive cyclist (3)
    • How old are you?:
    • 35 to 44 (3)
    • What is your gender?:
    • Male (6)
    • Was this a gift?:
    • No (3)

Reviewed by 7 customers

Displaying reviews 1-7

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(1 of 1 customers found this review helpful)

 
3.0

Excellent performance marred by short battery life

By 

from Buffalo NY

Pros

  • Easy to Use
  • Lightweight

Cons

  • Poor battery quality
  • Software best for Powertap head only

Best Uses

  • Long Rides
  • Road Bikes

The meter works great with my Garmin 520 and Ultegra cranks, but battery life has been about 50 hours not 200. I even bought a battery checker to make sure replacement is good. A minor nuissance, but important to note. Replacement is easy.
The software you can download is not a great fit with the Garmin products. Would love to easily see more pedaling data.
The power data seems very consistent and works well in adapting to temps and good in wet weather, etc....
I bought this unit as most other inexpensive power meters do not play well with Trek Madone rear brake. I am happy with the C1, but with battery issues would have considered pedal based unit or swapped out brakes to allow for Stages to clear.
I would not be able to recommend if Stages meter would work on your frame.

  • Describe Yourself:
  • Competitive Cyclist
  • How old are you?:
  • 45 to 54
  • What is your gender?:
  • Male
  • Was this a gift?:
  • No
  • How would you rate the quality of this product?:
  •  
  • How would you rate the value of this product?:
  •  
 
2.0

Problems with battery

By 

from Italia

Pros

  • Easy to Use

Cons

  • battery problems

Best Uses

  • Long Rides
  • Road Bikes

Bought in last february. after 40 days about 80 hours work battery go down, replaced but continuos problem untill a total no works of powermeter

  • Describe Yourself:
  • Competitive Cyclist
  • How old are you?:
  • 35 to 44
  • What is your gender?:
  • Male
  • Was this a gift?:
  • No
  • How would you rate the quality of this product?:
  •  
  • How would you rate the value of this product?:
  •  
 
5.0

Love the C1 Chainrings

By 

from Seattle WA

Pros

  • Durable
  • Easy to Use
  • Lightweight

Cons

    Best Uses

      Brought the C1 Chainring about three months ago and I have not had an issue at all. Connects everytime to my Garmin 910xt and my ant+ stick when I use trainerroad.

      • Describe Yourself:
      • Competitive Cyclist
      • How old are you?:
      • 35 to 44
      • What is your gender?:
      • Male
      • Was this a gift?:
      • No
      • How would you rate the quality of this product?:
      •  
      • How would you rate the value of this product?:
      •  
       
      5.0

      Excellent Product!

      By 

      from Washington

      Verified Buyer
      Site Member

      First off, any company that hand writes a thank you note is an A+ in my book! When I decided to buy a power meter I spent months researching for the best option for me with minimal changes to my bike. I ended up narrowing it down to two, and chose powertap because of the great reviews on their customer service. The C1 is an excellent addition to my bike and I love being able to see my left/right balance!

      • How old are you?:
      • 25 to 34
      • What is your gender?:
      • Female
      • How would you rate the quality of this product?:
      •  
      • How would you rate the value of this product?:
      •  

      (1 of 1 customers found this review helpful)

       
      5.0

      Game Changer

      By 

      from Pompano Beach, FL, USA

      Verified Buyer
      Site Member

      I've been loyal to Powertap for over 8 years...Basically for 2 reasons. 1) I'm very hard on equipment and their stuff stands up to the test and 2) When I did manage to break something, the service was completely outstanding..

      I've got about 50 hours on my C1 now.

      After 8 years of wheel based power, the transition was unbelievably simple.
      I prefer shimano components, so I bought a compact ultegra crankset (6750) and paired the standard 53/39 rings to it.
      Install took about 4 minutes... could not have gone any simpler.
      It also paired right away to my garmin w no issues. I don't like the fact that you can only update the software with an iphone.. I don't have an iphone.

      The manual says there is an hour or so 'break-in' phase, and they mean it.. readings were very erratic at first but I had faith in the manual.. Did some surges, and things came right in just like they were supposed to...

      I've compared this to a couple other wheels and it seems spot on with readings...perhaps a little smoother reporting (maybe a little different data collection rate?) But man the thing goes on so easy, and seems to be just like all the other powertap stuff with precision and accuracy... You're gonna pay what for an SRM??? really?

      I'll revise if something changes, but this thing is VERY cool so far.

      • How old are you?:
      • 45 to 54
      • What is your gender?:
      • Male
      • How would you rate the quality of this product?:
      •  
      • How would you rate the value of this product?:
      •  

      (1 of 1 customers found this review helpful)

       
      5.0

      Easy to use

      By 

      from Amherst, NY, USA

      Verified Buyer
      Site Member

      I pre-ordered the C1 chainrings right away as it was a great option for me. I just bought new pedals a few months prior so the P1 wasn't for me and the hubs are quite expensive. The C1 was the best choice. It was an easy install and only cost me $20 at my local bike shop since I didn't have the necessary tools. It was also very easy to pair to my Garmin 920xt. I haven't been able to ride with the C1 yet as I have been dealing with an injury. But so far everything has met my expectations. The powertap staff have been easy to get in touch with and ask questions as well.

      • How old are you?:
      • 25 to 34
      • What is your gender?:
      • Male
      • How would you rate the quality of this product?:
      •  
      • How would you rate the value of this product?:
      •  

      (0 of 3 customers found this review helpful)

       
      5.0

      Can't wait to try this out. My Hub based power meter has...

      By 

      from Undisclosed

      Verified Buyer
      Site Member

      Can't wait to try this out. My Hub based power meter has been fantastic

      • How old are you?:
      • 35 to 44
      • What is your gender?:
      • Male
      • How would you rate the quality of this product?:
      •  
      • How would you rate the value of this product?:
      •  

      Displaying reviews 1-7

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      Already have this product and need technical support?

      Get In Touch with Our Customer Support

      Do you have questions about this product?

      Get answers from real customers and in-house experts with AnswerBox.

      201 Questions | 202 Answers
      Displaying questions 1-10Previous | Next »
      • Q:

        Your web site says the C1 is "Only dual-sided power meter at this price point". Yet you also say it does not support left right balance. Does it just average the two power inputs?, Are you going to produce a device that does give the balance?
        Asked on 1/7/2017 by Tony from Buckinghamshire, UK

        1 answer

        • Staff Reviewer

          A:

          Dual sided meaning that it will account for reading power from both legs, but does not record this data independently just like the Hub.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        Hi,I have a C1 with a Polar M450 head unit, I can see the power and cadence but can't perform a manual zero, no facility for this on the Polar that I can find, will this effect the accuracy?
        Is there another way to do this?
        Thanks
        Asked on 1/7/2017 by spencer from Worthing, England

        1 answer

        • Staff Reviewer

          A:

          It could, do you have an iPhone where you could install our powertap mobile app? That would give you an easy way to zero the C1

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        With the onset of 1x road and cyclocross group-sets any chance 1x specific C1 chain-rings may come out soon? I've seen in the FAQ that interference doesn't allow less then a 50 tooth currently but would a 1x allow the space needed to get down towards 40 teeth?
        Asked on 12/20/2016 by David from Colorado

        1 answer

        • Staff Reviewer

          A:

          We are looking into how we can adapt the current C1 sensor to a 1X setup, stay tuned.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        really nice & innovative product. Will you be supporting 4x arm asymmetric kranks in the future? If so, when? Ultegra 6800 is quite popular imho ;-)
        Asked on 12/8/2016 by ThomasL from Duisburg, Germany

        1 answer

        • Staff Reviewer

          A:

          we are looking into other options but nothing more than the 5 bolt 110 BCD at the moment.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        What is the accuracy of the C1 chainrings power measurement? I did not see that listed
        Asked on 11/23/2016 by TonyG from Salisbury, NC

        1 answer

        • Staff Reviewer

          A:

          It's +/- 1.5%

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        i have a shimano sora 9 speed with 50-34t chainrings, will the 50-36t powertap chain ring will work?
        Asked on 11/21/2016 by Lawrence from Canada

        1 answer

        • Staff Reviewer

          A:

          Should work.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        Is it possible to transmit real time data to a PC while you are riding via an ANT+ or Bluetooth? Or, must you transmit to a cycling computer then download later?
        Asked on 10/28/2016 by BeetleATC from Clayton, NC

        1 answer

        • Staff Reviewer

          A:

          Sure, there are many cycling apps like virtual training that can collect this data.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        Do the 53-39 chain rings work with SRAM force 10spd 130 bcd? Thank you
        Asked on 10/28/2016 by G from Chicago, IL

        1 answer

        • Staff Reviewer

          A:

          Sorry no they will not.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        When chainrings are worn out with normal use, FAQ say I can replace the power pod unit myself as long as the chainring size is same. BUT FAQ also states re-calibration is recommended in the factory.

        If the factory re-calibration is not done, what will happen? If it is not that severe, just doing myself will be OK?

        And Is there any DIY guide about replacement? If it be, that will helpful. please let the users have it.

        Thank you.
        Asked on 10/12/2016 by RO

        1 answer

        • Staff Reviewer

          A:

          They can be replaced but are sensitive to proper installation. If you don't have access to a precice torque wrench it's best that you have us do the replacement for you.

          Answered on 1/11/2017 by Eric from SCG
      • Q:

        Does powertap c1 compatible with Shimano Ultegra 6870 di2?
        Asked on 10/9/2016 by Roladin from Israel

        1 answer

        • Staff Reviewer

          A:

          Sorry no, the C1 is not compatible with 4 arm cranks at this time.

          Answered on 10/10/2016 by Eric from SCG
      Displaying questions 1-10Previous | Next »

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