Our gen 1 and gen 2 power meters have a different sized battery compartment, which use an o-ring and battery door unique to that generation of power meter. The easiest way to distinguish which power meter you have is to do a visual inspection to see which color placard is on the exterior of the power meter: 



Once you're sure which version you have, use our provided visuals to see if you need replacement parts. 


Gen 1






Gen 1 power meters use a cover with 3 small tabs on the back. Your gen 1 power meter may have come with a black, red, or green o-ring. The green o-ring is our most recent o-ring and is ideal for your gen 1 meter, being made of a softer material and including a non-stick coating that helps ensure it stays in place when closing the door. If your o-ring appears damaged or missing or your battery door does not seem to close properly, we highly recommend obtaining replacements (which are no cost) in order to ensure the best performance from your power meter. 


Please note that these gen 1 o-rings and battery doors are not compatible with the gen 2 meters, which have a larger diameter battery opening.


To obtain replacement gen 1 o-rings or battery doors, please open up a support ticket with Stages Cycling or Stages Cycling Europe or visit your nearest Stages Cycling dealer for assistance. Click here for Dealer Locator (Global) / Dealer Locator (Europe)


Gen 2









The gen 2 power meters include a revised battery door design, which fully contains the outside edge of the battery. These power meters originally came with blue o-rings, which we updated to a more visible yellow color. Both o-rings are functionally identical, with the color only changed to improve visibility of the o-ring. If you have lost or need a replacement o-ring, a blue or yellow o-ring is required to prevent water intrusion in your power meter. We do not recommend in any instance substituting a gen 1 o-ring or a generic o-ring of a similar size purchased elsewhere.


If you lose an o-ring or battery door, make sure the replacement o-ring is blue or yellow and that the door matches the image above before attempting to install in your gen 2 Stages Power meter. 


To obtain replacement gen 2 o-rings or battery doors, please open up a support ticket with Stages Cycling or Stages Cycling Europe or visit your nearest Stages Cycling dealer for assistance. Click here for Dealer Locator (Global) / Dealer Locator (Europe)



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