Stages Cycling Power LR Powermeter | Crankset by Shimano - Ultegra R8100 | 2x12-speed

Technical details of the Stages Power LR Powermeter

• cadence measurement via optimised acceleration sensors and integrated ring lasers
• recording of performance data on both sides, but independently of each other
• power range: 0 - 2500 watts
• cadence range: 20 - 220 rpm
• Active Temperature Compensation (ATC) as an automated process to determine consistent performance data under any environmental conditions
• individual and independent calibration of each Stages powermeter for maximum measurement accuracy (+/- 1.5 %)
• integrated LED display for visualisation of battery level and calibration result (no active connection to the app or bike computer required)
• improved Bluetooth and ANT+ antennas for a 6-fold increase in data transmission strength
• wireless Firmware updates
• compatible software: Stages Link, Training Peaks, Strava, Garmin Training Center, etc.
• battery life: over 175 hours (over 200 hours with one-sided use)
• water resistance: IPX7

Shimano Ultegra FC-R8100 crankset

As the central element of the 12-speed drivetrain of the Ultegra R8100 series, the FC-R8100 crankset is characterised by the shifting quality and transmission efficiency typical of Shimano. Not only the chainrings which feature a Hollowglide construction, but also the lightweight crank arms which are manufactured using Hollowtech II technology, contribute to optimised power transmission as well as faster and more precise shifting operations.

All this adds up to a perfect balance between stiffness, stability, light weight and rotational efficiency. Numerous crank arm lengths and chainrings with 50-34 or 52-36 teeth also offer variability and an optimal gear ratio for almost every riding situation.

Hollowtech II

The guiding principle of Shimano's Hollowtech II technology is the perfect balance between stiffness, stability, weight and rotational efficiency. The goal was to produce a crank that minimizes the effort required for the drive and enables more efficient power transmission.

An exclusive forging process allows the production of extremely light crank arms that nevertheless guarantee maximum stiffness. The fixed connection of the right arm to the axle of the bottom bracket and its external bearing also serve an optimum relationship between stiffness and low weight.

Material:

crank arms, inner chainring: aluminium (anodized)
outer chainring: aluminium (anodized), carbon fiber reinforced polymer (CFRP)
axle: steel (plated)

Weight (manufacturer's specs):

approx. 700 g (170 mm | 50/34 teeth, without sensor)
approx. 711 g (170 mm | 52/36 teeth, without sensor)

approx. 35 g (Power LR Powermeter sensor)

Scope of supply:

crankset incl. integrated Powermeter sensors and batteries (2 CR2032 coin cells)