Busch & Müller IQ-X vs Knog Cobber Big
Comparison 2026 — Bike Lights
VS
Our verdict
Based on our weighted scoring, the Busch & Müller IQ-X edges out the Knog Cobber Big with an overall score of 92/100 against 80/100. It scores particularly well on brightness (90/100) and battery life (100/100), making it the better all-round pick in Bike Lights.
The Knog Cobber Big remains a sensible alternative if price is your main concern — it lands at €49.95 versus €89.95.
Brightness winner
Busch & Müller IQ-X
6% higher than its rival
Specifications
| Specification | Busch & Müller IQ-X | Knog Cobber Big |
|---|---|---|
| Price | €89.95 | €49.95+80% |
| Rating | ★4.7 (960) | ★4.5 (2,140) |
| Overall | 92/100+15% | 80/100 |
| Lighting | ||
| Brightness | 100 lux | 170 lumen+70% |
| Certification | StVZO, CE | — |
| Standlight | Ja, met condensor | — |
| Beam angle | — | 330° |
| Modes | — | 8 (incl. steady) |
| Power | ||
| Type | Naafdynamo 6V / 3W | — |
| Properties | ||
| Weight | 145 g | 39 g+272% |
| Waterproof rating | IP44 | IP67+52% |
| Mount | — | Siliconen band |
| Battery | ||
| Type | — | USB-C Li-ion |
| Runtime | — | 3 u (hoog) / 50 u (eco) |
Pros and cons
Busch & Müller IQ-X
Pros
- 100 lux with the widest, most even beam in its class
- Hub-dynamo powered: no more charging or battery swaps ever
- Standlight with capacitor — stays lit at traffic lights
- Fully weather resistant and virtually maintenance free
Cons
- Requires a hub dynamo — not an option for bikes without one
- Permanent mount: not easily swapped between bikes
Knog Cobber Big
Pros
- 330° visibility — you're seen from the side at junctions too
- USB-C charging port (Knog finally caught up)
- 170 lumens, bright enough for daytime riding
- Silicone housing — no fragile hinges or brittle clamps
Cons
- Flash modes are not legal as sole rear light in the Netherlands
- Silicone strap wears after 2-3 years of daily use