SpeedBox vs BadassBox — Which Ebike Tuning Kit to Choose?

These are the two most popular ebike tuning kits on the market. Both work — but their approach is completely different. This head-to-head covers every criterion that matters: installation, speed display, detection risk, price and motor compatibility.

SpeedBox on Amazon£139-239→BadassBox on Amazon~£135-209→

SpeedBox

Internal wired kit · Czech Republic

✓ Real speed on console

✓ Walk-assist activation

✓ Lifetime warranty

✓ Bluetooth (B.Tuning versions)

✓ Invisible once installed

✗ 30–90 min installation

✗ Torx tools required

View SpeedBox£139-239→

BadassBox

External magnetic kit · Germany

✓ 15 min, no tools needed

✓ Zero electronic traces

✓ Removable in 10 seconds

✓ IP67 (version 5)

✓ Universal (all motors with sensor)

✗ Console shows half real speed

✗ Visible on wheel sensor

View BadassBox~£135-209→

Detailed comparison — all criteria

Criterion	SpeedBox	BadassBox
Installation type	Internal — wired into motor harness	External — magnetic clip to wheel sensor
Speed display	Real speed on bike console	Half of real speed on console (Boost Buddy app = real)
Installation time	30 to 90 min depending on motor	15 min, no dismantling
Tools required	Torx T25, crank puller, extractor	None (magnetic clip)
Traces in motor	Potentially in firmware logs	Zero — no electronic contact
Price (approx.)	£139 – £239 depending on version	~£135 (universal version)
Motor compatibility	Bosch, Yamaha, Shimano, Bafang, Giant, Brose, Smart System	All motors with wheel speed sensor
Odometer accuracy	Correct (real speed displayed)	Halved on trip computer
Power source	None (wired to motor)	AAA battery (~7,000 km / 16 months)
Physical discretion	Invisible once installed	Visible on wheel speed sensor
Warranty	Lifetime (via SpeedBox.cz or Amazon)	1 year manufacturer

Recommendation by rider profile

The right kit depends on your priorities — no universal answer.

🔧

Beginners

→ BadassBox

15-min install with no tools, no risk of damaging the motor. Perfect for first-time tuning or testing without commitment.

View BadassBox→

⚙️

Experienced / DIY

→ SpeedBox

You know your tools and want real speed on your display. SpeedBox offers the best integration and lifetime warranty.

View SpeedBox→

🏪

Frequent dealer visits

→ BadassBox

You regularly take your bike to a service centre? BadassBox removes in 10 seconds with no traces. Zero warranty risk.

View BadassBox→

🤫

Maximum stealth

→ SpeedBox

Once installed, SpeedBox is completely invisible inside the motor. No external component, no visible modification from outside.

View SpeedBox→

⛰️

Electric MTB / wet terrain

→ SpeedBox

Wired internal integration is more reliable in prolonged wet or muddy conditions. No battery to replace.

View SpeedBox→

💷

Budget

→ BadassBox

BadassBox at ~£135 offers the lowest entry price. SpeedBox starts at £139 but offers lifetime warranty.

View BadassBox→

SpeedBox vs BadassBox FAQ

Which kit shows real speed on the display — SpeedBox or BadassBox?

SpeedBox shows real speed on the bike's console. BadassBox shows half the real speed on the console (because it halves the wheel sensor frequency). However, the Boost Buddy app (iOS/Android) displays real GPS speed. For accurate display on the bike console, choose SpeedBox.

Can I switch between normal and tuning mode with both kits?

Yes, both allow switching. SpeedBox activates via the Walk Assist button (2-second hold) — or via the app on B.Tuning versions. BadassBox activates via the Boost Buddy app. Both are switchable at any time.

Which kit is better for a Shimano EP801?

BadassBox 4 is the simplest solution for EP801 — external, no motor contact, no E299 risk. SpeedBox 1.3 is NOT compatible with EP801 (E299 permanent lock risk). For an internal kit on EP801, use PearTune MSO 3.0 instead.

Is the SpeedBox detected at a service visit?

SpeedBox potentially leaves traces in firmware logs. Remove it before any dealer visit. BadassBox leaves zero electronic traces — remove it in 10 seconds before dropping the bike off.

Does BadassBox work in rain and mud?

The BadassBox 4 is resistant to standard use. The BadassBox 5 is rated IP67 (fully waterproof). In prolonged immersion or extreme mud conditions, the BadassBox 4's sealed case provides adequate protection. For intensive MTB use in wet conditions, an internal kit (SpeedBox) has the advantage of being inside the sealed motor.

Ready to choose?

SpeedBox on Amazon£139-239→BadassBox on Amazon~£135-209→

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