You have a couple of power meter options for your SRAM Rival DUB crankset. Please see below for details.
Left Crank Arm Power Meter
SRAM Rival AXS Power Meter Crank Arm
This Rival power meter is made specifically for Rival AXS DUB cranksets. With this power meter, you replace your left side Rival crank arm with the new power meter version. This power meter is an easy and affordable way to add power to your SRAM Rival AXS crankset. The one consideration with this power meter is that it only measures left side power, whereas some other power meters are able to measure power from both legs.

SRAM Rival AXS Power Meter Crank Arm
Note 1 – This power meter is available in a Regular version (for most road bikes), as well as a Wide version (for bikes with larger rear tires such as gravel and CX bikes). If you are not sure which version you need, please see this article: Which version of SRAM Rival Power Meter do I need?
Note 2 – This power meter will NOT fit the older generation Rival GXP or BB30 cranksets. Please see the image below. If you have a Rival GXP or BB30 crankset, we would suggest this article: What power meter will work with my SRAM Rival BB30 or GXP crankset?
Pros: Affordable, easy to install, don’t have to change crankset
Cons: Measures left leg power only
Power Meter Pedals
Power meter pedals are one of our more popular power meter types as they can be installed on any crankset and work very well. They are also easy to install and can be moved from bike to bike. We have several models to choose from including the Favero Assioma, Garmin Rally and SRM EXAKT.
Pros: Easy to install, works on any bike, can move from bike to bike, don’t have to change crankset
Cons: More expensive