SRM PM9 Origin SRAM RED E1 Power Meter Crankset
The SRM PM9 Origin SRAM RED E1 Power Meter Crankset combines the SRM PM9 Origin 8-Bolt spider with SRAM RED E1 carbon crank arms. This dual sided SRM power meter measures power from both legs with accuracy rated at +/- 1.0 percent and weighs just 122 grams. It also features a rechargeable battery with up to 100 hours of ride time, active temperature compensation and left and right power balance data. To ensure exceptional consistency, SRM applies a detailed 144 point calibration process across all riding conditions.
This crankset uses SRAM RED E1 carbon crank arms, which are the lightest and stiffest road crank arms SRAM has produced to date. SRAM reduced weight by 29 grams compared to the previous generation while retaining the proven DUB spindle for broad compatibility. Riders can choose between a standard road spindle or a gravel focused XPLR spindle. The XPLR version increases Q-factor for improved tire clearance and better support for modern 1x gravel drivetrains. With crank lengths ranging from 150 mm to 175 mm, riders can dial in fit for nearly any setup using the SRM PM9 Origin SRAM RED E1 Power Meter Crankset.
Product Details
Key Features of the SRM PM9 Origin SRAM RED E1 Power Meter Crankset
- Lightweight and Stiff: The SRAM RED E1 crank arms keep power transfer high and the weight to a minimum using an optimized carbon fiber layup.
- Power Measurement: The SRM power meter measures power at the spider and is therefore able to measure power from both legs, accurate to +/- 1.0%.
- Rechargeable Battery: A rechargeable battery keeps the data flowing for 100 hours of riding.
- Wide Connectivity: SRM uses both ANT+ and Bluetooth Smart for hassle free data collection.
Power Measurement
The SRM PM9 Origin power meter measures power at the spider and is therefore able to measure power from both legs.
Compatibility
This power meter fits DUB bottom brackets and 110 BCD 4-bolt chainrings.
Considerations
SRM make extremely dependable power meters, however this also makes this power meter on the more expensive side.
Advice From Our Staff
While priced at a premium, this power meter crankset delivers excellent performance with the SRAM RED E1 crank arms. The SRM power meter spider is reliable, measures power from both legs, and delivers accurate data. If you want the performance of SRAM RED with dependable training metrics this power meter crankset is a great option.
Options
Crank arm length: The SRAM RED E1 cranks are available in the following sizes:
- 150 mm | 155 mm | 160 mm | 165 mm | 167.5 mm | 170 mm | 172.5 mm | 175 mm
Spindle length: You have the choice of two spindle lengths:
- DUB | XPLR
Professional Assembly (Optional)
We are happy to professionally assemble your power meter crankset if you select this option when ordering. This ensures your crankset is correctly built and saves you time. Professional assembly includes:
- Mount the power meter to the cranks and tighten to factory specifications
- Apply multi-purpose bicycle grease where necessary
- Install chainrings on the power meter (if chainrings are ordered)
Please note – while we tighten everything to factory specs, it is still your responsibility to routinely check your power meter crankset to make sure all bolts and nuts remain securely fastened.
Compatibility
- Chainrings: The power meter fits 110 BCD 4-bolt chainrings. In many cases, you can use your existing chainrings assuming they use the same configuration as the power meter you order. It is compatible with all Shimano 4-bolt chainrings, including Shimano 12-speed chainrings.
- Bottom Bracket: This power meter fits DUB bottom brackets.
In the Box
- SRM PM9 Origin 8-Bolt Road/Gravel Power Meter
- SRAM RED E1 carbon crank arms and spindle
- SRAM Torx T20 Spider Bolt Kit
- Charging cable
- User's manual
Specs
| Name | SRM SRAM RED E1 Carbon Crankset |
| Bike Type | Road | Gravel |
| 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 Fiber |
| Communication Protocol | ANT+ and Bluetooth Smart |
| Claimed Accuracy | +/- 1.0% |
| Active Temperature Compensation | Yes |
| Weight with DUB Cranks | 435g (170 mm) |
| Weight with DUB XPLR Cranks | 447g (170 mm) |
| Battery Type | Rechargeable |
| Battery Life | 100 hours |
| Method of Cadence Measurement | Accelerometer |
| BCD | 110 4-bolt |
| Spindle Length | Standard | XPLR |
| Q Factor | Standard - 145 mm | XPLR - 150 mm |
| Chainline | Standard - 45 mm | XPLR 47.5 mm |
| Warranty | 2 years |
Why Buy from Power Meter City
1. We ship fast! All orders ship on the same day your order is placed!
2. We are an authorized SRM dealer and this product comes with a full warranty.
3. Expert advice and customer service in case you need any help.
4. We offer a free, 30-day return policy on new items.
About our Company
At Power Meter City, we focus on power meters and related accessories and components. Our focus on these products means we can offer you the best possible selection, advice and service.
We have been in business since 2016 and are based in southern California. We are an authorized dealer of every product we sell.