All of the current inventory of Dura-Ace 7900 units will have our new Stages Power meter housing which is slimmer, and up to 28-percent lower profile than our original meter. It's sleeker by way of a 17-percent reduction in frontal area, and we've also made it stronger. The new housing design increases the strength of the battery door and housing connection by 200-percent over the previous design.
Pertinent Stages Power Shimano Dura-Ace 7900 model information:
The Stages Power Shimano Dura-Ace 7900 model is cross compatible with all Shimano Hollowtech II road models, from Tiagra to Dura-Ace 9000.
The technology is the same that's found on all Stages Power meters, and as used by Team Sky.
The Stages Power Shimano Dura-Ace 7900 model weighs only 8 grams more than the Stages Power Shimano Dura-Ace 9000 model, and 22 grams less than the Stages Power Shimano Ultegra 6800 model (average weights/actual difference may vary).
Accuracy: ± 2%
Power meter housing: new low profile design, with new door interface
Weight: Only adds 20g to base crank arm
Battery Life: 200+ hours (coin cell: CR2032)
Power range (Watts): 0 to 2500
Cadence range (rpm): 20-220
Water resistance rating: IPX7
Frame Compatibility: Most frames, see fit guide in our Support section
Device Compatibility: ANT+, Bluetooth Smart Ready Software
Compatibility: Training Peaks, Strava, Garmin Training Center and others