Aventon has built e-bikes with two kinds of pedal-assist sensor: a cadence sensor, which tells the motor the cranks are turning, and a torque sensor built into the bottom bracket, which measures how hard you press on the pedals. If assist stops working and you suspect the sensor, first work out which type your bike has: Aventon sells them as separate parts, split by model. Below is what Aventon's own parts listings said when we read them on November 1, 2026.
Cadence or torque: the model list answers it
Aventon's torque-sensor bottom bracket listing says the part "will detect the force applied to the pedals and optimize motor assistance," and that the design "is compatible with torque sensor models of Aventon Ebikes only." Its cadence sensor listing covers different bikes, and together the two lists show that one model family can use different sensors depending on the version.
- Pace 350, 350.2, 500 and 500.2 are on the cadence sensor list; Pace 350.3 and 500.3 are on the torque list.
- The Level listed without a number is on the cadence list; Level 2 and Level 3 are on the torque list.
- The Aventure listed without a number is on the cadence list; Aventure 2 and Aventure 3 are on the torque list.
- Sinch and Sinch ST are on the cadence list; Sinch 2 and 2.5 are on the torque list.
- Soltera SS is on the cadence list; Soltera 2 and 2.5 are on the torque list.
Check the exact version in your manual or on your receipt, not just the family name.
Torque-sensor bottom brackets: which variant fits which bike
The listing asks buyers to "select your model from the dropdown before adding to cart." On November 1, 2026 it showed seven variants:
- Abound SR / Abound LR: $59.99
- Aventure 2: $69.99
- Aventure 3: $52.99
- Level 2: $58.99
- Level 3 / Level 4 REC / Pace 4 / Pace 5 REC / Soltera 3 ADV: $58.99
- Pace 350.3 / Pace 500.3 / Soltera 2 / Soltera 2.5: $58.99
- Sinch 2 / Sinch 2.5: $59.99
One variant covers five models, so a Level 3 and a Pace 4 take the same listed part. But similar names do not always share: Aventure 2 and Aventure 3 are separate variants, as are Level 2 and Level 3, so a sensor from a friend's Aventon may not fit yours. The list also names the REC versions of the Level 4 and Pace 5; other versions of those bikes did not appear under those names, and we have not confirmed what they use.
Cadence sensors: two variants
The cadence sensor listing showed:
- Pace 350 / Pace 350.2 / Pace 500 / Pace 500.2 / Level / Sinch ST / Aventure / Soltera SS: $8.99
- Sinch: $12.99
The same listing notes that the cadence sensor for the Soltera 7S "is built into the Aventon Bottom Bracket," so that bike is not covered by this small sensor.
Checks before you order either part
A failed sensor is only one reason pedal assist quits. Work through the cheap checks first:
- Does the throttle still work? If it works, the battery, controller and motor are at least partly alive, and the fault is more likely in the assist path. Our pedal assist troubleshooting guide covers brake-lever cutoff switches, assist settings and connectors.
- Cadence bikes: on most cadence-sensor bikes the sensor reads a magnet ring that turns with the cranks; look for damage, dirt or a widened gap. Our cadence sensor guide walks through gap and alignment.
- Error code on the display? Look it up in our Aventon error codes guide before buying anything.
- Confirm the exact model and version, then order the variant listed for that bike.
What a bottom-bracket swap involves
A cadence sensor is a small part. A torque sensor is not: it sits inside the bottom bracket, so replacing it means removing both crank arms, unthreading the bottom bracket from the frame, fitting the new one and reconnecting its cable. That needs crank-removal and bottom-bracket tools many home mechanics don't own. Aventon's listing gives no installation steps and doesn't mention setup after the swap, and we have not found official instructions, so we can't say whether an extra step is needed. A bike shop can do the mechanical work. For the general approach to jobs like this, see our e-bike repair DIY guide.
These are Aventon's own parts, sold by model. We don't list a third-party torque sensor as a fit for these bikes, and we'd be cautious with any "universal" substitute unless the seller can show it matches your exact model.
Sources
- Aventon, "Aventon Bottom Bracket With Torque Sensor," aventon.com/products/aventon-bottom-bracket-with-torque-sensor (read November 1, 2026).
- Aventon, "Aventon Cadence Sensor," aventon.com/products/aventon-pace-500-speed-sensor (read November 1, 2026). Prices and variants change; check before you order.
RideRow is an independent parts retailer and is not affiliated with, endorsed by, or sponsored by Aventon. Aventon and model names are trademarks of their respective owners and are used here only to identify the bikes this guide covers.