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SRM PM9 Origin Road Carbon Power Meter

Josh Matthew January 13, 2022


The NEW SRM Road Origin! Accurate, light, stiff and compatible with almost any bike

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SRM PM9 Origin Road Carbon Power Meter

SRM has taken power measurement to the next level with its SRM 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. However, for the first time, the SRM Origin power meter uses a LOOK carbon crank arm which offers superior stiffness to weight ratio. In fact, the SRM Origin weighs a mere 599 grams!

In addition, the LOOK crank arm features Trilobe Technology, which allows the crank arm to function in three lengths, 170 mm, 172.5 mm and 175 mm, simply by rotating the Trilobe pedal inserts. The Origin also offers near limitless compatibility with exchangeable 30 and 24 mm spindles, which means it can be used on virtually any frame on the market.


SRM Origin Power Meter Highlights

Precision Accuracy

SRM uses a 144 point calibration protocol against a known mass measured to the exact gram. With precise calibration and its Auto-Offset feature, the Origin is accurate to +/- 1.5%.

Super Light and Stiff

Featuring LOOK carbon crank arms which weigh only 99 grams each, the SRM Origin offers superior stiffness to weight ratio. The entire power meter weighs in at only 599 grams!

Compatibility and Convenience

By simply rotating the Trilobe pedal inserts, the Origin offers three crank arm lengths: 170, 172.5 and 175 mm. In addition, with an exchangeable spindle design, it can be used on a wide variety of frames.

Battery Options

You can purchase the Origin with either SRM’s proprietary battery – which features 1,900 hours of battery life – or upgrade to a rechargeable battery for maximum convenience.


Crank Arm:

  • Carbon Trilobe – These are the lightest crank arms offered (260 grams). The crank arms function in three lengths, 170 mm, 172.5 mm and 175 mm, simply by rotating the Trilobe pedal inserts.
  • Carbon Composite – These carbon arms are still very light and stiff, but they weigh a bit more at 344 grams per set. However, they are also more affordable to purchase. They are available in 170 and 172.5 sizes only.

LOOK Carbon Trilobe

SRM LOOK Carbon Crank Arms

Carbon Composite

SRM Carbon Composite Crank Arms


If you would like to purchase this power meter without chainrings, select one of the following options in the dropdown menu above:

  • None – Shimano DURA-ACE (DA) Lid. If you wish to use your own Shimano chainrings.
  • None – Flat Lid. If you wish to use your own 110×4 asymmetric (non-Shimano chainrings).

If you would like to purchase the power meter with chainrings, available chainrings are:

  • SRM Origin Aluminum Chainrings (50/34 | 52/36 | 53/39) – These are great chainrings at an affordable price.
  • Carbon-Ti (50/34 | 52/36 | 53/39) – Full carbon chainrings, when only the finest will do!

Note – we also have SRM Origin Aluminum Campagnolo Chainrings available.


  • 24 MM – For use with 24 mm Shimano bottom brackets.
  • 30 MM – For use with 30 mm bottom brackets.

SRM 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.


Tools Needed for Installation

The following tools are typically required 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



Chainrings: The SRM PM9 Origin is compatible with any 110 BCD 4-bolt asymmetric chainrings (Shimano, SRM Aluminum, Carbon Ti, ROTOR, etc.). We offer this power meter with SRM Aluminum or Carbon Ti rings, however you may also use your own as well.

Please note, this power meter is compatible with the new Shimano Ultegra 8100 and DURA-ACE 9200 chainrings.

Bottom Bracket: This power meter fits 24 MM or 30 MM 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.


In the Box

  • SRM Origin Road Carbon Power Meter (spider, chainring if purchased, crank arms, spindle)
  • SRM USB Charger Cable
  • PC8 Bicycle Computer (if purchased)
  • Handlebar mount (if SRM PC8 is purchased)


SRM PM9 Origin Road Carbon Specs

NameSRM Origin Road Carbon
Bike TypeRoad
Location of Power MeasurementSpider
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes (Power Balance)
InstallationMore involved (60 min. estimated)
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Weight599 grams
Battery TypeRechargeable
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
BCD110 4-Bolt Asymmetric
Q Factor145.5 mm
Warranty3 years

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