SRM PM9 Powermeter Crankset - Campganolo 4-Bolt

The SRM PM9 Powermeter Crankset - Campagnolo 4-Bolt is SRM's flagship single-sided power meter crankset, built for riders running Campagnolo drivetrains who want precise, dependable wattage data on every ride. SRM has been making power meters longer than almost anyone in the industry, and the PM9 represents the current peak of that experience — a crankset that integrates measurement hardware without compromise to stiffness or weight. If you train or race seriously on a Campagnolo-equipped road bike, this is the power meter crankset the platform deserves.

SRM's measurement technology sits at the crank spider, using strain gauges bonded directly into the structure to capture torque data with a high sample rate and consistent accuracy across temperature changes and riding conditions. The PM9 is designed to deliver the kind of reliability that holds up across seasons of hard training — no fussing with magnet alignment, no pod to snag on your chainstay. The white finish on this variant pairs cleanly with builds where aesthetics matter as much as function, and the 4-bolt Campagnolo interface means it slots directly into compatible groupset configurations without adapters or workarounds.

SRM PM9 Powermeter Crankset - Specs at a Glance

• Compatibility: Campagnolo 4-bolt
• Chainring configuration: 52x36
• Crank arm length: 170mm
• Finish: White
• Measurement type: Spider-based strain gauge power meter
• Manufacturer: SRM
• Product type: Power meter crankset

Design Benefits

1. Spider-integrated measurement for structural integrity: By locating the strain gauges within the crank spider itself, SRM's design avoids the penalties associated with bolt-on pods or external sensors — the crankset behaves like a crankset first, with power measurement built in rather than bolted on.
2. Direct Campagnolo compatibility: The 4-bolt interface is designed to work natively with Campagnolo groupsets, which matters on builds where precise drivetrain alignment and component tolerances are non-negotiable — particularly during long group rides or criterium racing where drivetrain feel under load is noticeable.
3. Established platform with long-term support: SRM's decades in the power meter space mean the PM9 benefits from a mature ecosystem — firmware updates, calibration support, and compatibility with all major head units and training platforms are part of what you get with a brand that has built its reputation entirely on this technology.