SRM has taken power measurement to the next level with its SRM PM9 Origin Road Carbon Power Meter. Like all SRM power meters, the Origin features SRM’s 144 point calibration protocol, resulting in unmatched accuracy and consistency. The PM9 version also features Left/Right Power Balance, Magnet-less cadence, Automatic temperature compensation, and Bluetooth SMART, among other new features. The Origin also offers near limitless compatibility with exchangeable spindle sizes, crank arms, and chainrings – to fit any bike or ride preference.
Key Product Details
Compatibility:
This power meter is compatible with 110 BCD 4-bolt chainrings. It fits 24 MM, 30 MM or 28.9 MM DUB bottom brackets, depending on the version ordered. See Compatibility tab for more information.
Power Measurement:
This SRM power meter measures power at the spider and is therefore able to measure power from both legs.
Key Features:
Dual-leg power measurement, accurate to within +/- 1.0%, lightweight, rechargeable battery, 100 hours of battery life, left/right power balance, automatic temperature compensation, ANT+ and Bluetooth compatible, 3-year warranty. See Specs tab for more information.
Advice From Our Staff:
It’s not cheap, but this is one of our nicest power meters. It is highly accurate, stiff, lightweight, look amazing and come with a solid 3-year warranty. You can mount a wide range of both 2x and 1x chainrings to it, from Shimano to Carbon-Ti to ROTOR and more. In addition, with an option to order it with a 24 mm, 30 mm or DUB spindle, you can put it on almost any bike.
Options For This Power Meter
Crank Arm:
LOOK-SRM Carbon (170/172.5/175) – These are the lightest crank arms offered (260 grams). The crank arm functions in three lengths, 170 mm, 172.5 mm and 175 mm, simply by rotating the Trilobe pedal inserts.
SRM Carbon Composite – These carbon arms are still very light and stiff, but they weigh a bit more than the LOOK-SRM Carbon at 344 grams per set. However, they are also more affordable.
LOOK-SRM Carbon (170/172.5/175)
SRM Carbon Composite
Lid:
9200 Lid – For Shimano 9200 chainrings
9100 Lid – For Shimano 9100 chainrings
Flat Lid – For any other 110×4 chainrings
Spindle:
24 MM – For use with 24 mm Shimano bottom brackets.
30 MM – For use with 30 mm bottom brackets.
28.9 MM DUB – For use with DUB bottom brackets.
PC8 Bundle:
While not listed in the dropdown menus above, you can bundle the SRM PM9 Origin Power Meter with a SRM PC8 Bike Computer. When you do, you get $249 off the standard price of the PC8. Please contact us if you would like this option.
Chainrings For Your SRM 9 Road Power Meter
Here are the most commonly ordered chainrings with this power meter:
Chainrings: The SRM PM9 Origin is compatible with any 110 BCD 4-bolt asymmetric chainrings (Shimano, SRM Aluminum, Carbon-Ti, ROTOR, etc.).
Bottom Bracket: This power meter fits 24 MM, 30 MM or 28.9 MM DUB bottom brackets, depending on the version ordered. If you are ordering the same size as you currently have on your bike, you should be able to re-use your existing bottom bracket. However, if you are chaining spindle sizes, you will need to replace your bottom bracket. Please contact us with questions, we are happy to help.
SRM PM9 Origin Road Carbon Specs
Name
SRM PM9 Origin Road Carbon
Bike Type
Road
Location of Power Measurement
Spider
Left or Both Legs Measured
Both
Independent Left/Right Measurement
Yes - Power Balance
Installation
More involved (60 min. estimated)
Crank Arm Material
Carbon
Communication Protocol
ANT+ and Bluetooth SMART
Claimed Accuracy
+/- 1.0%
Active Temperature Compensation
Yes
Weight
Varies based on configuration
Battery Type
Rechargeable
Battery Life
100 hours
Method of Cadence Measurement
Accelerometer
BCD
110 4-bolt asymmetric
Spindle Size
24 mm or 30 mm
Q Factor
145.5 mm
Warranty
3 years
In the Box
SRM PM9 Origin Road Carbon Power Meter (spider, crank arms and spindle)
SRM USB Charger Cable
PC8 Bicycle Computer (if purchased)
Handlebar mount (if SRM PC8 is purchased)
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.
3 mm Allen key
10 mm Allen key
Common Questions and Answers
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.
1 review for SRM PM9 Origin Road Carbon Power Meter
Rated 5 out of 5
Helen (verified owner)–
PM9 is great upgrade from older generation SRM. Outstanding customer service from Power Meter City.
Power Meter City –
Thank you, Helen! We hope you will continue to enjoy them! Please let us know if there is anything else we can do! Ride safe!
Helen (verified owner) –
PM9 is great upgrade from older generation SRM. Outstanding customer service from Power Meter City.
Power Meter City –
Thank you, Helen! We hope you will continue to enjoy them! Please let us know if there is anything else we can do! Ride safe!