Roadboss E300
EU tyre label for every size: 9 sizes of this summer tyre compared with the rest of the market
The Roadboss E300 is a summer tyre for passenger cars. Its supplier has registered it in the EU product database (EPREL) in 9 sizes (14 registrations including load and speed variants), for 18″ to 21″ rims.
Wet grip is rated B–C depending on size, fuel efficiency A–B and external rolling noise 71–72 dB.
The label depends on the size. Sorted by wet grip, then fuel efficiency, then noise, the best-labelled size on sale is HL255/55ZR19 (Wet grip B · Fuel efficiency A · 72 dB), the weakest HL245/45ZR20 (Wet grip C · Fuel efficiency B · 71 dB).
On the EU market since March 2025; the earliest production week registered is 01/2024.
How it compares in its sizes
We compared each size with all other summer tyres of the same size and class in EPREL (9 sizes had at least four rivals). A size scores when its label is at least as good as 75% of them.
Strongest point: fuel efficiency. Weakest point: rolling noise, where most same-size rivals do as well or better.
What the label means on the road (HL265/40ZR21)
Example: the HL265/40ZR21 size, compared with the 6 other summer tyres registered in this size.
Wet braking from 80 km/h
≈37 m with class B, against ≈34 m for the most common class in this size (A).
Fuel efficiency
Class A, the most common class in this size: no difference to the typical tyre.
Rolling noise
72 dB against a median of 72 dB in this size.
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 9 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 |
|---|---|---|---|---|---|---|
| 18″ rims | ||||||
| HL215/55ZR18 | 102W XL · 102W XL | C60% | B100% | 71 dBB60% | — | 01/2024 |
| HL245/45ZR18 | 103W XL · 103W XL | C60% | B100% | 71 dBB60% | — | 01/2024 |
| 19″ rims | ||||||
| HL235/50ZR19 | 106W XL | C50% | B100% | 71 dBB50% | — | 01/2024 |
| HL245/45ZR19 | 105W XL · 105W XL | C60% | B100% | 71 dBB60% | — | 01/2024 |
| HL255/55ZR19 | 113W XL · 113W XL | B60% | A100% | 72 dBB60% | — | 01/2024 |
| 20″ rims | ||||||
| HL245/45ZR20 | 106W XL | C50% | B100% | 71 dBB50% | — | 01/2024 |
| HL255/45ZR20 | 108W XL | B50% | A100% | 72 dBB50% | — | 01/2024 |
| HL255/50ZR20 | 111W XL · 111W XL | B60% | A100% | 72 dBB60% | — | 01/2024 |
| 21″ rims | ||||||
| HL265/40ZR21 | 108W XL | B40% | A100% | 72 dBB50% | — | 01/2024 |
Best-labelled summer tyres in HL265/40ZR21
Other tyres on sale in the same size, sorted by wet grip, then noise, then fuel efficiency.
- Bridgestone Potenza SportA A 70 dB
- Rauffan Avantar R7A C 70 dB
- Sicuro Velos Sport S5A C 70 dB
- Habilead E300B A 71 dB
- Kapsen E300B A 72 dB
- Continental SportContact 7B A 73 dB
Questions
Is the Roadboss E300 a quiet tyre?
Its declared rolling noise ranges from 71 dB to 72 dB (median 71 dB). In 0% of the sizes we could compare, it is at least as quiet as three quarters of same-size rivals.
How good is the Roadboss E300 in the wet?
Its wet grip class is B–C. In 0% of compared sizes that is at least as good as three quarters of same-size rivals.
Is the Roadboss E300 suitable for snow?
No size carries the 3PMSF symbol, so it is not certified for severe snow. In countries with winter tyre rules it does not count as a winter tyre.
When was the Roadboss E300 launched?
It has been on the EU market since March 2025. The earliest production week in its registrations is 01/2024; the DOT code on the sidewall shows the week and year of your tyre.
More from Roadboss
Source: EPREL, the European Commission’s product registry for energy labelling — 14 registrations, data as of 23 October 2026. Suppliers have updated 0 of these registrations since first publication. Label values are the supplier’s declaration.