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SRM PM7 Origin Road Aluminum Power Meter

Josh Matthew October 26, 2022


The SRM Origin with aluminum crank arms and a new, lower price!

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SRM PM7 Origin Road Aluminum Power Meter

The SRM PM7 Origin Road Aluminum Power Meter adds another option for riders that want to take advantage of the best SRM has to offer. With the Origin Aluminum, you get the accuracy, consistency and durability SRM is known for, but at a price below that of the Carbon version. In addition, if you’re looking to run shorter crank arm lengths, the Origin Aluminum has you covered! While the Carbon version has 170, 172.5 and 175 mm options, with the Aluminum you also have options of 160 and 165 mm. 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 Road Aluminum 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%.

Compatibility and Convenience

The Origin offers near limitless compatibility with exchangeable 30 and 24 mm spindles, which means it can be used on virtually any frame on the market.

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 Arms: The SRM Aluminum crank arms are available in the following sizes:

  • 160 mm | 165 mm | 167.5 mm | 170 mm | 172.5 mm | 175 mm

Chainrings: 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 9100 Lid. If you wish to use your own Shimano DA 9100 chainrings.
  • None – Shimano DURA-ACE 9200 Lid. If you wish to use your own Shimano DA 9200 chainrings.
  • None – Flat Lid. If you wish to use your own 110×4 asymmetric chainrings (non-Shimano chainrings).

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

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

Spindle: 24 MM | 30 MM

  • 24 MM – For use with 24 mm Shimano bottom brackets.
  • 30 MM – For use with 30 mm 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: The SRM PM7 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.

SRM PM7 Origin Road Aluminum Specs

NameSRM PM7 Origin Road Aluminum
Bike TypeRoad
Location of Power MeasurementSpider
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementNo
InstallationMore involved (60 min. estimated)
Crank Arm MaterialAluminum
Communication ProtocolANT+
Claimed Accuracy+/- 2.0%
Active Temperature CompensationNo
Weight966 grams
Battery TypeRechargeable
Battery Life100 hours
Method of Cadence MeasurementMagnet
BCD110 4-bolt asymmetric
Spindle Size24 mm or 30 mm
Q Factor145.5 mm
Warranty3 years

In the Box

  • SRM PM7 Origin Road Aluminum Power Meter (spider, chainring if purchased, crank arms, spindle)
  • SRM USB Charger Cable
  • Cadence Magnet Kit
  • SRM PC8 Cycling 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

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