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Why choose Powermetershop?
- Order number: SW10940
The Inpeak Powercrank Shimano Ultegra FC-R8100 is a single-sided power meter for performance-focused road bikes. It measures on the left crank arm and suits riders who want a clean balance of performance, low weight and easy handling. The setup stays light, discreet and easy to maintain. In the Ultegra segment, that is often exactly the combination that makes most sense in daily use.
Strengths and weaknesses
- Single-sided power measurement with solid accuracy (± 2%).
- CR2032 battery is quick and easy to replace.
- Compatible with Shimano Hollowtech II road cranks.
- Integrated cadence measurement.
- Only 10 g added weight.
- ANT+ and Bluetooth LE.
- Automatic temperature compensation.
- IP67 protection.
- Left-side measurement only.
- No true left-right balance data.
- TL-FC16 tool required for installation.
Who this model suits
This model suits riders who train a lot but do not want unnecessary system complexity. It works for long rides, interval sessions, race preparation and pacing. If you want reliable power data and want to keep the bike visually and technically clean, this model is a very good fit.
Why the battery version makes sense
The battery version works well if you want easy maintenance and want to stay independent from charging cycles. You can replace a flat battery quickly. That is often more practical on trips, in training camps or just before a ride than having to recharge first. That is why many riders in higher road segments still choose the battery version on purpose.
Compatibility and installation
The power meter fits Shimano Hollowtech II road cranks. The housing sits on the inside of the left crank arm. Around 10 mm of frame clearance should be available in the power meter area. For installation you need the Shimano TL-FC16 tool. You can find more matching models in our Inpeak category.
Single-sided measurement in practice
The power meter measures only the left leg and doubles the value for total power. In practice this is enough for training, pacing and load control. If you want very accurate balance data, you need a different system. For normal road use, that is rarely the deciding point.
Connectivity and daily use
The power meter sends power and cadence via ANT+ and Bluetooth LE. It works with many bike computers, apps and indoor platforms. Automatic temperature compensation keeps readings stable when weather and temperature change. You install firmware updates wirelessly through the Inpeak app.
Alternative systems
If you want a similar Shimano crank-arm power meter, you can also browse our 4iiii category. Both systems follow a similar idea. In our experience, Inpeak power meters are more robust and come back less often as complaints.
If you prefer a pedal-based system, you can also browse our Favero Assioma category.
Specifications
|
Measurement location: |
Left crank arm |
|
Accuracy: |
± 2% |
|
Weight: |
10 g added to the crank arm |
|
Battery: |
CR2032, tool-free replacement |
|
Battery life: |
Up to 200 h riding time, up to 6 months standby |
|
Data transmission: |
ANT+, Bluetooth LE |
|
Firmware updates: |
Wireless via Inpeak app |
|
Power range: |
20 to 2000 watts |
|
Cadence range: |
20 to 200 rpm |
|
Temperature compensation: |
Yes, automatic |
|
Operating temperature: |
-5 to +50 °C |
|
Water resistance: |
IP67 |
|
Frame clearance: |
Approx. 10 mm between left crank arm and frame |
|
Compatible cranks: |
Shimano Hollowtech II road cranks |
|
Available lengths: |
170, 172.5, 175 mm |
|
Warranty: |
2-year manufacturer warranty |
What's included
✔ Inpeak Powercrank power meter
✔ Left crank arm
✔ CR2032 battery
✔ User manual
FAQ about the Inpeak Power Meter Shimano Ultegra FC-R8100 Powercrank
Question: Who is this model for?
Answer: Performance road riders who want a light and simple system.
Question: Is a left-side power meter enough?
Answer: Yes, in most cases for training and pacing.
Question: Why is the battery version attractive?
Answer: You stay independent from charging cycles and can replace the battery quickly yourself.
Manufacturer
INPEAK S.C.
Lotnicza 139
54-132 Wrocław
Poland
E-Mail: contact@inpeak.pl
EAN: 05907465630627
MPN: PC V30 SH R81 70 B
Product safety
Specific safety information that applies to this product can be found in the operating instructions for the product.
