Syron 365 Days
EU tyre label for every size: 14 sizes of this 3PMSF-marked tyre compared with the rest of the market
The Syron 365 Days is a 3PMSF-marked tyre for passenger cars. Its supplier has registered it in the EU product database (EPREL) in 14 sizes (14 registrations including load and speed variants), for 13″ to 18″ rims.
Wet grip is rated B in every size, fuel efficiency E and external rolling noise 71 dB. Every size carries the three-peak mountain snowflake (3PMSF), the mark for tyres tested in severe snow.
On the EU market since May 2026; the earliest production week registered is 20/2026.
How it compares in its sizes
We compared each size with all other winter and 3PMSF tyres of the same size and class in EPREL (14 sizes had at least four rivals). A size scores when its label is at least as good as 75% of them.
Strongest point: wet grip. Weakest point: fuel efficiency, where most same-size rivals do as well or better.
What the label means on the road (225/45 R17)
Example: the 225/45 R17 size, compared with the 668 other winter and 3PMSF tyres registered in this size.
Wet braking from 80 km/h
≈37 m with class B, against ≈41 m for the most common class in this size (C).
Fuel efficiency
Class E vs the typical D: ≈0.16 L/100 km more, about 24 litres more over 15,000 km for a 1,500 kg car.
Rolling noise
71 dB against a median of 72 dB in this size (1 dB quieter).
Estimates from the class ranges in Regulation (EU) 2020/740. A label class is a range, so a real tyre can sit anywhere inside it. Every 3 dB doubles the sound energy.
All 14 sizes
The small figure under each class is the share of same-size, same-season tyres this size matches or beats (“–” when fewer than five tyres share the size).
| Size | Load / speed | Wet | Fuel | Noise | Snow / ice | Production from |
|---|---|---|---|---|---|---|
| 13″ rims | ||||||
| 175/70 R13 | 82H | B100% | E24% | 71 dBB62% | 3PMSF | 20/2026 |
| 14″ rims | ||||||
| 165/70 R14 | 85H XL | B99% | E17% | 71 dBB64% | 3PMSF | 20/2026 |
| 175/65 R14 | 82H | B99% | E17% | 71 dBB65% | 3PMSF | 20/2026 |
| 185/65 R14 | 86H | B100% | E15% | 71 dBB61% | 3PMSF | 20/2026 |
| 15″ rims | ||||||
| 185/60 R15 | 88V XL | B100% | E11% | 71 dBB64% | 3PMSF | 20/2026 |
| 195/60 R15 | 88H | B100% | E10% | 71 dBB75% | 3PMSF | 20/2026 |
| 16″ rims | ||||||
| 195/55 R16 | 87H | B99% | E10% | 71 dBB73% | 3PMSF | 20/2026 |
| 215/55 R16 | 97V XL | B99% | E7% | 71 dBB78% | 3PMSF | 20/2026 |
| 225/55 R16 | 99V XL | B99% | E8% | 71 dBB80% | 3PMSF | 20/2026 |
| 17″ rims | ||||||
| 215/50 R17 | 91V | B98% | E6% | 71 dBB78% | 3PMSF | 20/2026 |
| 225/45 R17 | 94V XL | B98% | E8% | 71 dBB80% | 3PMSF | 20/2026 |
| 225/50 R17 | 98V XL | B98% | E6% | 71 dBB80% | 3PMSF | 20/2026 |
| 18″ rims | ||||||
| 225/40 R18 | 92V XL | B98% | E8% | 71 dBB78% | 3PMSF | 20/2026 |
| 225/45 R18 | 95V XL | B98% | E6% | 71 dBB75% | 3PMSF | 20/2026 |
Best-labelled winter and 3PMSF tyres in 225/45 R17
Other tyres on sale in the same size, sorted by wet grip, then noise, then fuel efficiency.
All tyres in 225/45 R17, ranked by label →
- Radar Dimax WinterA D 70 dB
- Bridgestone Blizzak LM005A C 71 dB
- Bridgestone Blizzak LM005 DriveguardA C 71 dB
- Nokian Tyres Snowproof 3PA B 72 dB
- Kumho WP52+A C 72 dB
- Pirelli Cinturato Winter 3A C 72 dB
Questions
Is the Syron 365 Days a quiet tyre?
Its declared rolling noise is 71 dB in every size. In 43% of the sizes we could compare, it is at least as quiet as three quarters of same-size rivals.
How good is the Syron 365 Days in the wet?
Its wet grip class is B. In 100% of compared sizes that is at least as good as three quarters of same-size rivals.
Is the Syron 365 Days suitable for snow?
14 of 14 registrations carry the 3PMSF symbol, which means the tyre passed the EU severe-snow test. Check the exact size in the table.
When was the Syron 365 Days launched?
It has been on the EU market since May 2026. The earliest production week in its registrations is 20/2026; the DOT code on the sidewall shows the week and year of your tyre.
More from Syron
Source: EPREL, the European Commission’s product registry for energy labelling — 14 registrations, data as of 23 October 2026. Suppliers have updated 14 of these registrations since first publication. Label values are the supplier’s declaration.