The Shimano Ultegra FC-R8100-P is the 12-speed Ultegra crankset with a dual-sided power meter built in. It measures left and right leg power to within ±2.0%, compensates for temperature changes on its own, and adds force-vector data for analysing pedal-stroke efficiency in SHIMANO CONNECT Lab. The integrated, waterproof Li-ion battery recharges on the bike and runs up to 226+ hours per charge (depending on ANT+ / Bluetooth LE settings). Zero-offset calibration is a single press of the switch on the transmitter.

Offered in 165, 170, 172.5 and 175 mm with 50-34T or 52-36T chainrings, or without chainrings where Shimano lists them — the options below show what is available now.

Stocked by Tune Cycles in Marrickville, Sydney — buy online, or have us fit it in the workshop: tunecycles.com.au/book.

Shimano warrants this product against defects in materials and workmanship for 2 years from the date of original purchase. This warranty covers manufacturing defects and does not extend to normal wear, improper installation, misuse, or damage caused by accident. Shimano's obligation under this warranty is limited to repair or replacement of the defective product at Shimano's discretion.

For warranty support, return the item to Tune Cycles.

  • Dual-sided power measurement, ±2.0% strain-gauge accuracy across the calibration range
  • Integrated, waterproof, rechargeable Li-ion battery — up to 226+ hours of ride time
  • ANT+ and Bluetooth LE connectivity
  • Zero-offset calibration from the switch on the transmitter
  • Active temperature compensation
  • Force-vector data for pedal-stroke analysis in SHIMANO CONNECT Lab
ModelFC-R8100-P (Ultegra, 12-speed)
MeasurementDual-sided (left and right)
Accuracy±2.0%
BatteryIntegrated rechargeable Li-ion, up to 226+ hours
ConnectivityANT+, Bluetooth LE
Average weight758 g (50-34T), 769 g (52-36T)
OptionsCrank length 165 / 170 / 172.5 / 175 mm; 50-34T, 52-36T or without chainrings
SKU SHM-FC-R8100-P
Brand Shimano

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