S1 Power Meter Spider

NEXGA S1

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THE NEXT-GENERATION POWER METER SPIDER NEXGA S1

Pro-level accuracy. Breakthrough lightweight design.

From laboratory calibration to real roads, S1 delivers accurate, consistent and traceable data for every pedal stroke.

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S1 HIGHLIGHTS

Professional measurement, built into every ride.

From sensing and computation to calibration, connectivity and protection, S1 puts professional power measurement in a lightweight body.

1% power accuracy

Laboratory-grade measurement accuracy

16-Bit ADC

High-resolution, high-precision 16-bit analog-to-digital conversion

180-hour battery

Long-lasting power for repeated training and distance rides

Dual connectivity

ANT+ and Bluetooth 4.0 support for leading devices

USB-C charging

Fast charging through a convenient universal port

Ultra-thin, only 95 g*

Compact construction with less added weight

IPX7 water resistance

Built for rain, mud and wet riding conditions

Dynamic torque calibration

Consistent accuracy across the full power range

High-precision six-axis gyroscope

Same cadence · rough-road comparison

Millisecond response keeps cadence measurement accurate even over rough roads.

Gyroscope

Stable output

Accelerometer

More noise on bumps

Time

0s2s4s6s8s10s12s

Smooth sectionRough section

LABORATORY-GRADE ACCURACY

±1% accuracy.
Trust every watt.

±1%

Power accuracy

16Bit

High-resolution ADC

Advanced strain gauges combine with automatic temperature compensation and intelligent zeroing to capture every power change, even through temperature swings and demanding road conditions.

Automatic temperature compensationIntelligent auto-zeroLeft/right power balance

NEXGA S1 ±1% power accuracy construction

DYNAMIC TORQUE CALIBRATION

Every unit verified.
Accuracy documented.

FULL RANGE

Low · medium · high verification

EVERY UNIT

Factory dynamic calibration

Every S1 is compared in real time with a high-precision torque sensor across the complete power range and ships with its own calibration report.

Individual calibration reportMeasurement consistency verifiedTraceable calibration data

NEXGA S1 dynamic torque calibration equipment

Real-time high-precision torque sensor comparison

USB-C FAST CHARGING & LONG BATTERY LIFE

Charge quickly.
Ride farther.

180hours

Maximum battery life

15min

Adds up to 50 hours of riding

The universal USB-C port works with leading chargers and power banks. A full charge takes about two hours, preparing S1 for long-distance rides.

* Actual battery life and charging time vary with environment, equipment and usage.

ANT+ & BLUETOOTH DUAL CONNECTIVITY

Multiple devices.
Real-time sync.

ANT+

Bike computers and trainers

BLE4.0

Phones and training apps

Compatible with leading Garmin, Wahoo and Sigma bike computers and training apps, with real-time multi-device sync for seamless power and cadence data.

IPX7 protection, ready for the elements

Withstands immersion in one meter of water for 30 minutes. Precision sealing protects internal components so you can stay focused through heavy rain and mud.

COMPACT DIMENSIONS & FRAME COMPATIBILITY

Broad compatibility.
Built for modern frames.

≤57mm

Drive-side outer diameter

90.5–92mm

Installed total width

Compact bottom-bracket clearance fits most modern frames, while precise installation dimensions simplify setup.

T47BB386Large-diameter BB

TECHNICAL SPECIFICATIONS

NEXGA S1 specifications

Measurement

Power accuracy: ± 1.0 %
Power range: 0 - 2200 W
Cadence range: 30 - 220 rpm
Data metrics: Power, cadence, left/right balance, pedal smoothness

Power

Battery capacity: 180 mAh
Battery life: Up to 180 hours
Rated charging input: 5V / 0.2A
Charging port: USB Type-C

Physical

Weight: ≤ 95 g
Water resistance: IPX7
Operating temperature: -10°C – 50°C
Wireless: ANT+ / Bluetooth 4.0

The listed data is based on testing in standard laboratory conditions. Actual performance may vary with device settings, riding conditions and usage.

IN THE BOX

Everything you need to get started.

Purchase details

NEXGA S1 power meter

Power meter spider, dynamically torque-calibrated before leaving the factory.

QTY × 1

3 m USB-C charging cable

Extra length makes charging easier after installation.

QTY × 1

Color decals

Multiple colors to match your riding style.

QTY × 6

Spare dust plug

Everyday dust protection for the charging port.

QTY × 1

Quick-start guides

Get started with installation, connection and first use.

QTY × 1

User manual

Complete setup, connection and operating instructions.

QTY × 1

Calibration report

Individual dynamic torque calibration data for your unit.

QTY × 1

Purchase details

MODEL COMPARISON

Choose the model for your crank

Model	Chainring	Interface	Weight	Compatibility
SRAM 3-BOLT 104BCD	104BCD	SRAM 3-bolt	95 g	SRAM NX, GX, SX, X1, X01, XX1; PRAXIS Series
SRAM 3-BOLT 110BCD	110BCD 5-arm	SRAM 3-bolt	95 g	BIGROCK RS; SRAM RIVAL, FORCE; FOVNO; SENICX; PRAXIS
SRAM EE 3-BOLT 110BCD	110BCD 5-arm	SRAM 3-bolt	95 g	Cane Creek eeWings
SRAM 3-BOLT 110BCD-4S	110BCD 4-arm	SRAM 3-bolt	95 g	BIGROCK RS; SRAM RIVAL, FORCE; FOVNO; SENICX; PRAXIS
SRAM 8-BOLT 110BCD	110BCD 5-arm	SRAM 8-bolt	95 g	SRAM RIVAL, FORCE, RED; Cane Creek eeWings
SRAM 8-BOLT 110BCD-4S	110BCD 4-arm	SRAM 8-bolt	95 g	SRAM RIVAL, FORCE, RED; Cane Creek eeWings
EASTON 110BCD-4S	110BCD 4-arm	EASTON CINCH	95 g	EASTON EC90; ELILEE XXE; CYBREI GP-3; INCOLOR SkyPivot; CENIT
ROTOR ALDHU 110BCD-4S	110BCD 4-arm	ROTOR ALDHU	95 g	ROTOR ALDHU