Article

🧰 Tools You Need

Everything you need to install a Bafang kit, including the three mid-drive specialty tools most people don't already own. Gather them before you start so nothing gets damaged.

July 12, 20263 min read

🧰 Tools You Need

Complete Bafang BBS02 750W mid-drive kit you'll be installing

You don't need a full pro shop, but a mid-drive install has three specialty tools most people don't already own. Buy or borrow them before you start — improvising here is how parts get damaged. A front-hub install needs far less (see the note at the end).

Gather everything below before you remove a single bolt.

The tools

💡 Tip: the front-hub kit needs only basic tools.

  • Crank puller (square-taper) — What it's for: Removing your existing crank arms — the puller threads into the crank and pushes it off cleanly. Never hammer crank arms off or you'll mushroom the spindle and ruin the crank. · Needed for: Mid-drive (front-hub skips)
  • Bottom bracket tool that matches YOUR current bottom bracket — What it's for: Removing your current BB. Most bikes use a splined cartridge BB (Shimano-style, Hollowtech/BBT external splined tool); older bikes may have external cups or a different interface. Look at your BB before ordering; a photo to our support team will confirm it. · Needed for: Mid-drive (front-hub skips)
  • Bafang lockring wrench (a.k.a. the Bafang/Luna wrench) — What it's for: Fits the Bafang M33 4-notch lockrings that clamp the motor to your frame. We sell it, and Luna Cycle makes one too. A standard adjustable spanner rounds the notches easily; get the real wrench if you can. · Needed for: Mid-drive (front-hub skips)
  • 15mm pedal wrench (or a thin 15mm open-end wrench) — What it's for: Removing your pedals. · Needed for: Mid-drive
  • Metric hex/Allen key set (typically 2–8mm) — What it's for: Crank bolts, chainring bolts, display/throttle/brake clamps. · Needed for: Mid-drive
  • Phillips and flat screwdrivers — What it's for: The speed-sensor screw, cable ties, and clamp screws. · Needed for: Mid-drive
  • T20 Torx security bit — What it's for: Bafang's speed-sensor magnet screw. It ships with the kit; don't lose it. · Needed for: Mid-drive
  • Chain tool — What it's for: Shortening/breaking the chain — you'll almost always re-size it after the chainring change. · Needed for: Mid-drive
  • Torque wrench (roughly 5–50 Nm) — What it's for: The lockring and crank torques matter, and "gutentight" is how people strip threads. Strongly recommended. · Needed for: Mid-drive
  • Blue thread locker (Loctite 242/243) — What it's for: The inner lockring, especially on 73mm shells. · Needed for: Mid-drive
  • Grease (anti-seize or bike grease) — What it's for: The BB threads and spindle. · Needed for: Mid-drive
  • Cable ties / zip ties and side cutters — What it's for: Routing the wiring harness. · Needed for: Mid-drive
  • File or emery cloth (plus penetrating oil) — What it's for: Deburring the inside of the BB shell (see mid-drive Step 3); penetrating oil if you suspect a seized bottom bracket. · Needed for: Mid-drive
Front-hub kits need much less: a 15mm/17mm wrench (or the correct axle-nut socket) and the torque arm hardware. No crank puller, no BB tool, no lockring wrench. That's a big part of why hub kits are the "easiest" install.

If you don't own the specialty tools and don't want to buy them for a one-time job, most bike shops will remove your cranks and bottom bracket for around $20–40 — a reasonable option if your BB turns out to be seized.

Supplement: the full Installation hub and the Mid-Drive (BBS02/BBSHD) install guide & video. 📎 Manuals (PDF downloads):
Was this article helpful?

Related Articles

🛑 Brake Cutoff (E-Brake) Sensor Install

Brake cutoff sensors kill motor power the instant you squeeze a lever, the safety net that makes Bafang's cadence PAS feel predictable. Here is how to fit and test them on every build.

🛠️ Classic Pain Points (Read This If You Get Stuck)

The handful of snags that stall most Bafang installs, distilled from ten years of support calls, with the field-tested fix for each so you can get unstuck fast.

🛠️ Front-Hub Kit Install — Step by Step

The front-hub kit is the easiest Bafang install: no bottom-bracket work, you keep your cranks and shifting, and most riders are done in one to two hours. Just don't skip the torque arm.

🔦 Front LED Headlight (Optional Accessory)

The optional Bafang front LED headlight wires off the display's low-voltage output and mounts to your fork crown or handlebar. Here is how to route the lead and mount it cleanly.

⚙️ Gear Shift Sensor Install

The gear shift sensor briefly cuts motor power each time you shift so the chain moves under no load, sparing your drivetrain. Optional on the BBS02 and strongly recommended on the BBSHD.

Back to Installation