Introduction: why retrofit is the 2026 trend
Introduction: Why retrofit is the major trend of 2026 E-bike retrofit is no longer just an alternative—it has become the smartest choice for two simple reasons:
- Price: A quality new e-bike typically costs around €2,000. Converting your current bike costs between €400 and €1,100 – a saving of 40 to 60%.
- Eco impact: Reusing a robust steel or aluminum frame instead of manufacturing a new one significantly reduces your carbon footprint.
(Note: This is where you keep your favorite frame while giving it modern power.)
Why choose retrofit in 2026? (Savings & Sustainability).
In 2026, component inflation has made brand-new e-bikes less accessible. A conversion kit lets you choose your motor output and battery capacity precisely, without paying premium pricing from big-name systems like Bosch or Shimano.
The Hub Motor: accessible efficiency.
Technical principle and installation simplicity
A hub motor is built directly into the wheel hub (front or rear). It’s the simplest solution to install: you replace the original wheel with the motorized wheel, connect the battery, and you’re done.
Advantages and limits
- Advantages: Lower cost, quick installation (under one hour), does not wear the bike’s chain.
- Limits: Less effective on very steep climbs, less natural “push” sensation, less balanced weight distribution.
- Typical torque: Often between 40 Nm and 50 Nm.
The Mid-Drive: for performance-focused riders.
Why is it the purist’s choice?
A mid-drive drives the drivetrain directly. It uses your bike’s gears, which makes it highly efficient in the mountains or when carrying heavy loads.
Advantages and ride feel
- Advantages: Low center of gravity, optimal efficiency, outstanding climbing performance.
- Limits: More expensive, more technical installation (requires removing the crankset), faster chain wear.
- Typical torque: Often between 80 Nm and 100 Nm.
Bafang vs Tongsheng: the mid-drive showdown.
This is the matchup everyone is watching in 2026.
- Bafang BBS02: Raw power. Very reliable, massive torque (100 Nm), ideal for riders who want pure output.
- Tongsheng TSDZ2: Precision. Equipped with a torque sensor, it responds to how hard you push on the pedals. The harder you push, the more it helps. It’s the closest feel to a high-end e-bike.
Comparison table: which kit is right for you?
| Criterion | Hub Motor | Mid-Drive |
| Installation difficulty | Easy (2/5) | Advanced (4/5) |
| Torque (Nm) | Medium (45 Nm) | High (80–100 Nm) |
| Indicative price | €400 – €700 | €600 – €1,100 |
| Best use case | City riding, flat terrain, commuting | Hills, MTB, cargo |
Battery range in Wh: stop thinking in kilometers
In 2026, we no longer talk about “manufacturer range”—we talk about Wh (watt-hours).
- 360 Wh: Ideal for 30–40 km in the city.
- 540 Wh: The standard if you don’t want to worry.
- 720 Wh and above: For bikepacking or very long commutes.
Conclusion: which motor should you choose?
- Choose a Hub Motor if you’re on a tight budget and ride mostly on flat terrain.
- Choose a Mid-Drive if you live in a hilly area or want a premium, “transparent” ride feel.