ERider T17 73mm (4-Arm)
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The only currently-produced standalone torque-sensing bottom bracket for hub motor conversions. Replaces the entire BB assembly with an integrated torque sensor, 18-pole quadrature PAS encoder, and 170mm zero Q-factor cranks. Measures actual pedal force (both left and right cranks) and outputs a 1.5-3.3V analog signal proportional to torque at 70 Nm/V scaling, plus a 2-wire quadrature cadence signal for forward/reverse pedal detection. Side cable exit — no frame drilling required. Plug-and-play with Cycle Analyst V3 and compatible with VESC controllers via ADC input. Chainring not included. Sold exclusively by Grin Technologies.
In brief: Torque pedal assist sensor. 18 pulses per revolution. From $183.
Specs verified Sep 5, 2026
Where to Find
Prices tracked across 1 sellerPrice History
Current best price $182.50. Over the past 90 days: low $173.00, high $182.50, average $180.53 — up 1% vs average.
- Grin Technologies
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Specifications
Specifications
- Sensor Type
- Torque
- Pulse Count
- 18
Physical
- Weight
- 1.06 kg
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Green | Encoder A |
| 4 | White | Encoder B |
| 5 | Blue | ADC Channel 1 |
