What bottom bracket size does the Bafang BBS01B fit?

It fits bottom bracket widths of 68–73mm.

What is the power rating of the Bafang BBS01B?

The Bafang BBS01B is rated at 350W.

Bafang BBS01B

Name: Bafang BBS01B
Brand: Bafang
Availability: InStock

The Bafang BBS01B is the entry-level Bafang mid-drive, sharing the BBS02B housing but with a 6-FET controller and lower output (250W EU / 350W). It produces up to 80 Nm and roughly 600W peak through a 1:21.9 two-stage reduction with a 44T chainring, using a 12-magnet cadence PAS and the Bafang UART display protocol. Fits standard 68/73mm threaded bottom brackets; IPX5 water resistance. Popular for lightweight, EU-compliant pedelec and stealth conversions.

In brief: 350W mid-drive motor. Fits 68–73mm bottom bracket. 36–48V rated. From $516.

Specs verified Jun 23, 2026

Where to Find

Prices tracked across 3 sellers

AliExpress - IEBIKE Motor Battery Store

$515.85 + free shipping

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Amazon

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Price History

Price changes tracked by the crawler

+ Shipping- Coupons

Current best price $515.85. Over the past 90 days: low $515.85, high $515.85, average $515.85 — about average.

AliExpress - IEBIKE Motor Battery Store

All Records

2 price records in this period

Date	Price	Shipping	Total	Change	Coupon	Rating	Sales	In Stock	Status
AliExpress - IEBIKE Motor Battery Store(2 records)
Jun 23, 202601:11 AM	$515.85	$0.00	$515.85	$0.00	—	—	—	Yes	active
Jun 23, 202601:11 AM	$515.85	—	$515.85	Initial	—	—	—	Yes	active