ERider T17 100mm (4-Arm)

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Spider

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 $179.

Specs verified Jul 7, 2026

Where to Find

Prices tracked across 1 seller

Grin Technologies

$179.00

Price History

Price changes tracked by the crawler

+ Shipping- Coupons

Current best price $179.00. Over the past 90 days: low $179.00, high $179.00, average $179.00 — about average.

Grin Technologies

All Records

7 price records in this period

Date	Price	Shipping	Total	Change	Coupon	Rating	Sales	In Stock	Status
Grin Technologies(7 records)
Jul 7, 202610:36 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
Jun 25, 202609:10 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
Jun 21, 202609:00 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
Jun 3, 202609:22 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
Jun 2, 202605:57 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
May 31, 202607:36 PM	$179.00	—	$179.00	$0.00	—	—	—	Yes	active
May 27, 202608:07 PM	$179.00	—	$179.00	Initial	—	—	—	Yes	active