ERider T17 73mm (5-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 $183.

Specs verified Jul 7, 2026

Where to Find

Prices tracked across 1 seller

Grin Technologies

$182.50

Price History

Price changes tracked by the crawler

+ Shipping- Coupons

Current best price $182.50. Over the past 90 days: low $173.00, high $182.50, average $173.23 — up 5% vs 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, 202610:40 PM	$182.50	—	$182.50	$9.50	—	—	—	Yes	active
Jun 25, 202609:15 PM	$173.00	—	$173.00	$0.00	—	—	—	Yes	active
Jun 21, 202609:05 PM	$173.00	—	$173.00	$0.00	—	—	—	Yes	active
Jun 3, 202609:26 PM	$173.00	—	$173.00	$0.00	—	—	—	Yes	active
Jun 2, 202606:03 PM	$173.00	—	$173.00	$0.00	—	—	—	Yes	active
May 31, 202607:46 PM	$173.00	—	$173.00	$0.00	—	—	—	Yes	active
May 27, 202608:07 PM	$173.00	—	$173.00	Initial	—	—	—	Yes	active