The Trelock LS 633 DUO TOP is a compact, versatile rear light designed for bikes fitted with a dynamo, whether a hub dynamo or a sidewall (bottle) dynamo. It fits easily onto the mudguard or the seatstays using the bracket supplied. It provides constant illumination and includes an automatic standlight function, so you stay visible and safe even when stationary.
Key features
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Dynamo powered (6 V) — ideal for traditional bikes and e‑bikes fitted with a dynamo.
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Flexible mounting — can be fixed to the mudguard or the seatstays (bracket included).
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Good visibility — effective light that makes you visible from a distance.
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Automatic standlight — stays lit for a few minutes after you stop for extra safety.
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Integrated reflector — extra safety when the light is not powered.
Technical specifications
| Feature |
Details |
| Brand / Model |
Trelock LS 633 DUO TOP |
| Type |
LED rear light (dynamo) |
| Power supply |
6 V dynamo (hub or sidewall) |
| Mounting |
Mudguard or seatstays (bracket included) |
| Visibility / range |
Up to 500 m / effective visibility in normal use |
| Automatic standlight function |
Yes (a few minutes after stopping) |
| Integrated reflector |
Yes |
| Weight |
~40 g |
| Approval |
StVZO compliant (German standard for bicycle lighting) |
| Recommended use |
City bike, trekking, bikes with a dynamo (traditional or e‑bike) |
