There are several power meters that will work on Specialized cranksets:
Spider Power Meters
These are power meter power meters are compatible with Specialized S-Works carbon cranks. The Quarq is compatible with cranks from 2013-current, whereas the power2max fits all models. They come in both 110 and 130 BCD options and work with traditional 5-bolt chainrings from most manufacturers. In addition, because they are spider-based power meters, they measure power from both legs.
Pros: Moderately priced, VERY reliable, don’t have to change crankset, measures both legs
Left Crank Arm Power Meter
This Stages crank arm will work on 2017 and newer Specialized S-Works Road cranksets with Spindle F. This power meter measures left leg power only.
Please note, whenever you are installing a left side power meter crank arm, you need to confirm you have 10mm of clearance between the left crank arm and the chainstay in order for the sensor to clear. Please see the image below.
Pros: Easy to install, don’t have to change crankset
Cons: Measures left leg power only
Power Meter Pedals
Power meter pedals can be installed on any crankset. We have many different models to choose from.
Pros: Easy to install, works on any bike, can move from bike to bike, don’t have to change crankset