Shimano Ultegra 12-speed power metre

The left power meter crank arm for the Ultegra Powermeter FC-R8100-P with sensor unit.

Contents of item 2 in the exploded view:

• 1x left crank arm with measuring unit, 2x clamping screws, 1x O-ring, 1x retaining plate, cover

With the FC-R8100-P power metre cranksets, Shimano offers an extremely high-performance power metre crankset in the 12-speed Ultegra series. The Ultegra FC-R8100-P power metre crankset offers the full range of functions and the same precision as its Dura-Ace counterpart, but at a more attractive price. Thanks to active temperature compensation via Shimano’s proprietary strain gauges, dual-side power measurement and an accuracy of ±2.0 per cent, the power meter reliably transmits data to ANT+/Bluetooth® LE display devices.

Training under scientific conditions requires precise measurements, but also user-friendliness. The new ULTEGRA R8100 power metre crankset excels in both respects. Dual-side measurement is accurate to within 2.0 per cent, and zero-point calibration can be carried out quickly and easily. Perhaps most importantly, however, is the battery life, the ease of charging, and the ANT+ and Bluetooth® LE connectivity, which make recording and utilising training data easier than ever before.

Shimano Ultegra Power Meter Technology:

The newly developed power meter crankset from the Ultegra R8100 series with power measurement on both sides. The power meter’s central unit is compactly positioned behind the crank spindle, and the strain gauges are integrated into the left and right crank arms. Thanks to the battery integrated into the axle, the Bluetooth interface and the ability to update the power meter’s firmware via the E-Tube platform. The ANT+ and Bluetooth® LE interface is compatible with many cycle computers.

Shimano Ultegra R8100 crank arms

Hollow-forged chainrings, thin-walled hollow-forged crank arms and a reduction in the outer surface area reduce the weight of the new Shimano Dura-Ace FCR 9100 crankset to 609 grams. The design of the 2x11-speed Hollowtech II crankset not only boasts a look and aesthetic with cult potential, but also ensures enhanced performance. A wider, yet lighter than its predecessor, crank arm and the large chainrings with Hollowglide technology increase stiffness and optimise power transfer to the pedal.

Shimano Ultegra FC-R8100-P Powermeter Crank Technology:

• for 2x12-speed drivetrains
• ANT+, Bluetooth interface
• Right and left measurement
• 110 mm bolt circle 4-arm asymmetrical
• Chainline 44.5
• Lithium-ion battery with up to 300 hours of runtime
• Required charging cable: EW-EC300
• Weight approx. 760 grams (manufacturer’s specification)

Compatible bottom bracket shells

There is now a wide variety of bottom bracket shells available for modern frames. Shimano only offers compatible bottom brackets for some of these. Wheels Outboard bottom brackets are significantly more durable than standard press-fit bearings, as the bearing cups are bolted together, ensuring they sit flat and securely within the frame. Wheels bearings are available in various quality grades: ABEC3 standard bearings, angular contact bearings and ceramic bearings.

• BSA threaded housing, 68 mm installation width Shimano
  Dura Ace SM-BB9000B bottom bracket
• Housing: ITA thread, installation width 70 mm – Shimano Dura Ace
  SM-BB9000I bottom bracket
• Housing: Pressfit BB86, installation width 86.5 mm, press-fit diameter 41 mm,
  bottom bracket: Shimano SM-BB92-41B,
  bottom bracket: Wheels MFG Outboard BB86-OUT
• BB30 shell, installation width 68 mm, press-fit depth 42 mm Wheels MFG Outboard
  BB30-OUT bottom bracket
• Pressfit 30 housing, installation width 68 mm, press-fit depth 46 mm Wheels MFG Outboard
  PF30-OUT bottom bracket
• BBRight shell, installation width 79 mm,
  press-fit diameter 46 mm Wheels MFG Outboard BBRIGHT-OUT
• Housing BB386, installation width 86.5 mm, press-fit depth 46 mm, Wheels MFG Outboard
  386EVO + 386EVO-SHI bottom bracket
• Trek BB90 shell, installation width 90 mm, press-fit dimension 41 mm FSA
  230-600 bottom bracket

Herstellerinformation: SHIMANO INC., 3-77 Oimatsu-cho, Sakai-ku, Sakai-shi, Osaka 590-8577, Japan, www.shimano.com | EU contact: Shimano Europe BV, High Tech Campus 92, 5656 AG Eindhoven, The Netherlands, www.shimano.com