Shimano Ultegra ST-R8000 Left Double Lever, Mechanical
- Train harder and smarter with industry-leading accuracy with 3D technology capably of measuring tri-.
- axial strain 3D patent pending power meter technology measures tri-axial strain to provide accurat.
- e consistent data Left sided, compact design, extremely lightweight at 9 grams Data accuracy is.
- 4iiii Precision Ride Ready Left Side Power Meter.