TSDZ8 vs TSDZ16: Which One Actually Needs More Torque?
| Rating | Produit | Prix | |
|---|---|---|---|
| 8.5/10 |  Tongsheng TSDZ8Tongsheng | 336 € | |
| 7.9/10 |  Tongsheng TSDZ16Tongsheng | 366 € |
On paper, the TSDZ16 is the most powerful Tongsheng motor on the market. It's also the only one of the four motors we track with no manufacturer spec sheet found anywhere. Here's how the two actually compare, without smoothing over that difference.
The comparison table
| Tongsheng TSDZ8 | Tongsheng TSDZ16 | |
|---|---|---|
| Spec sheet source | Official (tongsheng-e.com) | Resellers only |
| Maximum torque | 90 / 120 / 140 N·m | 160 N·m (2 consistent resellers) |
| Power | 500 / 750 W | 1,000 W |
| Voltage | 36 V / 48 V | 48 V |
| Bottom bracket | 68 or 73 mm | 68 to 73 mm |
| Weight | 4.8 kg (official) | 6 kg (single source, unconfirmed) |
| Water resistance | IP65 (official) | IPX6 (single source, unconfirmed) |
| In Tongsheng's official catalog | Yes | No |
| First documented mention | 2024 | 2025 |
What the table reveals
The TSDZ16 wins on paper, the TSDZ8 wins on certainty. 160 N·m versus an official ceiling of 140 N·m for the TSDZ8: a real gain, if the figure holds up. But it's the only row in this table where the TSDZ16 rests on consistent sources — weight and water resistance rely, for it, on a single reseller only, where the TSDZ8 has both confirmed by the manufacturer.
The TSDZ16 doesn't appear on any Tongsheng spec sheet we were able to check. That's not a reason to rule it out — it's sold by serious resellers, alongside the official models — but it is a reason to verify the exact configuration before buying for a demanding use case (cargo, professional).
What actually differs in real-world use
On paper, the torque gap (140 versus 160 N·m) represents roughly a 14% increase in pulling power for the TSDZ16 — a real gain on hills or under load, but one that sits within the margin of uncertainty of a figure unconfirmed by the manufacturer. The TSDZ8's gear ratio (38, versus 22 reported for the TSDZ16 by a single source) also suggests different design logic, not simply a harder-pushed TSDZ8.
The TSDZ16 is also the heavier of the two (6 kg claimed versus 4.8 kg official), which directly affects handling on the converted bike — particularly for cargo use, where every extra kilogram on the bottom bracket is felt in low-speed maneuvering.
Our recommendation
Tongsheng TSDZ8
Up to 140 N·m officially documented by Tongsheng: the best balance between power and manufacturer traceability.
336 €
→ Our full TSDZ8 review · Our full TSDZ16 review · The full range comparison
Frequently asked questions
Is the TSDZ16 really more powerful than the TSDZ8?
On paper, yes: 160 N·m claimed versus 90 to 140 N·m officially documented for the TSDZ8. But the TSDZ16 figure comes from resellers, not the manufacturer — so the margin of uncertainty is larger.
Why choose the TSDZ8 if the TSDZ16 is more powerful?
Because the TSDZ8 is the only one of the two confirmed by a complete manufacturer spec sheet. For a buyer who wants a guarantee that the specs match reality, that’s at least as important a factor as an extra 20 N·m of unconfirmed torque.
Is the TSDZ16 worth the risk for a cargo bike or heavy use?
It’s a deliberate trade-off: more potential torque against less official traceability. For intensive use (cargo, professional), we recommend contacting the reseller directly to confirm the specs before buying, rather than relying on the listing alone.
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