Busch & Müller Cycle Star 80 vs Zéfal Spy
Comparison 2026 — Bike Mirrors
VS
Our verdict
Based on our weighted scoring, the Busch & Müller Cycle Star 80 edges out the Zéfal Spy with an overall score of 82/100 against 70/100. It scores particularly well on field of view (78/100) and sturdiness (88/100), making it the better all-round pick in Bike Mirrors.
The Zéfal Spy remains a sensible alternative if price is your main concern — it lands at €12.00 versus €20.00.
Field of view winner
Busch & Müller Cycle Star 80
12% higher than its rival
Value winner
Zéfal Spy
2% better value for money
Specifications
| Specification | Busch & Müller Cycle Star 80 | Zéfal Spy |
|---|---|---|
| Price | €20.00 | €12.00+67% |
| Rating | ★4.4 (1,850) | ★4 (2,450) |
| Overall | 82/100+17% | 70/100 |
| Mirror | ||
| Type | Bar-end convex | Klemspiegel plat |
| Diameter | 80 mm+48% | 54 mm |
| Field of view | ~25°+25% | ~20° |
| Lens material | Echt glas, convex | Kunststof gespiegeld |
| Mounting | ||
| Bar clamp | Ø 18–22 mm binnenmaat | Ø 22–32 mm (rubberen band)+22% |
| Weight | 95 g | 35 g+171% |
| Stem material | Aluminium / rubber kogelgewricht | Kunststof / rubber |
| Fastener | Spreidbout inbus | Enkele zeskantbout |
Pros and cons
Busch & Müller Cycle Star 80
Pros
- Real convex glass — sharp image without the plastic haze of cheaper mirrors
- Bar-end mounting damps handlebar vibration better than a clamp on the bar
- Gooseneck adjusts in every direction and stays exactly where you put it
- German B&M build — years outdoors without the mirror coating degrading
Cons
- Requires an open bar end — will not fit road or city bikes with glued-in plugs
- 80 mm can protrude slightly too wide on narrow city-bike handlebars
Zéfal Spy
Pros
- Fits any bar diameter from 22 to 32 mm thanks to a rubber clamp
- Friendly price around 12 euros — a low barrier to trying a mirror
- Flexible arm can face either inboard or outboard
- Light (35 g) — barely noticeable on the bar
Cons
- Plastic lens gives a hazy reflection at distance, especially in rain
- Vibrates noticeably on cobbles and broken concrete — image becomes unsteady