Stages Ultegra R8100 Dual

Stages Power meter is built on Shimano Dura-Ace R8100. The Stages Power meter is placed on both sides of the crank in order to independently measure a rider's left and right legs.
 
Accuracy: ± 1.5%
Power meter housing: low profile design, with robust door interface
Weight: Only adds 15g to base crank arm
Battery Life: 175+ hours (coin cell: CR2032) 
Power range (Watts): 0 to 2500
Cadence range (rpm): 10-220
Water resistance rating: IPX7
The Dura-Ace 8100 crankset is compatible with all 12-speed Shimano Hollowtech II road bottom brackets.
 
Available in:
170mm - 50/34
172.5mm - 52/36
175mm- 52/36