Sigeyi ROTOR ALDHU Carbon Road Power Meter CranksetSeptember 19, 2023
$790.00 – $810.00
Lightweight, stiff, dual-sided road power meter crankset!
Sigeyi ROTOR ALDHU Carbon Road Power Meter Crankset
The Sigeyi ROTOR ALDHU Carbon Road Power Meter Crankset combines the Sigeyi spider with an ultra-light ALDHU Carbon crankset. This Sigeyi crankset measures power from both legs, is accurate to +/- 1.0% and is lightweight. The power meter also features a rechargeable battery with 300 hours of ride time, auto-zero functionality, and left and right leg power balance.
In addition, this power meter crankset uses ROTOR’s first ever carbon crank arms! The ALDHU Carbon Crankset is very light, weighing 100 grams less than the ALDHU aluminum model. In addition, vertical and horizontal stiffness had been increased by 11% and 36%, respectively.
Key Product Details
This power meter fits 30 MM bottom brackets and 110 BCD 5-bolt or 110 BCD 4-bolt chainrings based on the version ordered. See Compatibility tab for more information.
The Sigeyi power meter measures power at the spider and is therefore able to measure power from both legs.
Dual-leg power measurement, lightweight carbon fiber crankset, accurate to +/- 1.0%, 300 hours of battery life, rechargeable battery, very lightweight, left/right power balance, ANT+ and Bluetooth compatibility, auto-zero (automatic calibration). See Specs tab for more information.
Advice From Our Staff:
This is a more expensive power meter with the carbon crank arms, however at $790 you get dual-sided power and very lightweight and stiff carbon fiber crank arms. When compared to similar power meter cranksets, it’s a pretty nice value. If it’s in your budget, we highly recommend it.
Options For This Power Meter
BCD: This power meter is available in the following BCDs in order to fit your choice of chainring sizes:
- 110 5-Bolt | 110 4-Bolt
Crank arms: The ROTOR ALHDU Carbon arms use a 30 mm spindle and are available in the following sizes:
- 155 mm | 165 mm | 170 mm | 172.5 mm | 175 mm
Professional Assembly (Optional)
We are happy to professionally assemble your power meter crankset if you select this option when ordering. This ensures your crankset is correctly built and saves you time. Professional assembly includes:
- Mount the power meter to the cranks and tighten to factory specifications
- Apply multi-purpose bicycle grease where necessary
- Install chainrings on the power meter (if chainrings are ordered)
Please note – while we tighten everything to factory specs, it is still your responsibility to routinely check your power meter crankset to make sure all bolts and nuts remain securely fastened.
Chainrings: The power meter fits 110 BCD 5-bolt or 110 BCD 4-bolt chainrings based on the version ordered. In many cases, you can use your existing chainrings assuming they use the same configuration as the power meter you order.
The 110 BCD 4-Bolt version is compatible with all Shimano 4-bolt chainrings, including Shimano 12-speed chainrings.
Bottom Bracket: This power meter fits 30 MM bottom brackets. If you currently have a 30 MM crankset on your bike, you should be able to re-use your existing bottom bracket. However, if you are changing spindle sizes, you will need to replace your bottom bracket.
Sigeyi ROTOR ALDHU Carbon Crankset Specs
|Name||Sigeyi ROTOR ALDHU Crankset|
|Location of Power Measurement||Spider|
|Left or Both Legs Measured||Both|
|Independent Left/Right Measurement||Yes - Power Balance|
|Installation||More involved (60 min. estimated)|
|Crank Arm Material||Carbon Fiber|
|Communication Protocol||ANT+ and Bluetooth SMART|
|Claimed Accuracy||+/- 1.0%|
|Active Temperature Compensation||Yes|
|Battery Life||300 hours|
|Method of Cadence Measurement||Accelerometer|
|BCD||110 5-bolt or 110 4-bolt|
|Spindle Size||30 mm|
|Q Factor||147.5 mm|
In the Box
- Sigeyi power meter
- ROTOR ALDHU Carbon crank arms and spindle
- Charging cable
- User's manual
- Decals: Black, Red, Green, Silver, Blue
Tools Needed for Installation
You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.
- 10 mm Allen key
Common Questions and Answers
Question: Does the Sigeyi ROTOR ALDHU Carbon Road Power Meter Crankset come in a 24 mm version?
- Unfortunately, no. ROTOR only makes the ALDHU Carbon in 30 mm. However, the Sigeyi ROTOR ALDHU Road Power Meter Crankset comes in both 24 mm and 30 mm.
Question: Is the Sigeyi 4-bolt version compatible with Shimano 12-speed chainrings?
- Yes, you can install Shimano 12-speed chainrings on this power meter.
Question: How do I determine what length my current cranks are so I can make sure I get the same size?
- Your crank arm length should be printed or stamped on the inside of the left crank arm, usually near the pedal end.