Nankang CX668
EU tyre label for every size: 17 sizes of this summer tyre compared with the rest of the market
The Nankang CX668 is a summer tyre for passenger cars. Its supplier has registered it in the EU product database (EPREL) in 17 sizes (17 registrations including load and speed variants), for 12″ to 15″ rims.
Wet grip is rated B in every size, fuel efficiency D and external rolling noise 70–71 dB.
On the EU market since July 2014; the earliest production week registered is 32/2014.
How it compares in its sizes
We compared each size with all other summer 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 (175/70R14)
Example: the 175/70R14 size, compared with the 670 other summer 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 D, the most common class in this size: no difference to the typical tyre.
Rolling noise
70 dB against a median of 70 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 17 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 |
|---|---|---|---|---|---|---|
| 12″ rims | ||||||
| 155/80R12 | 77T | B100% | D72% | 70 dBB83% | — | 04/2019 |
| 165/70R12 | 77T | B100% | D82% | 70 dBB77% | — | 08/2019 |
| 13″ rims | ||||||
| 155/80R13 | 79T | B99% | D82% | 70 dBB69% | — | 20/2016 |
| 165/70R13 | 83H | B99% | D72% | 71 dBB7% | — | 32/2014 |
| 165/80R13 | 83T | B99% | D71% | 70 dBB67% | — | 20/2016 |
| 175/70R13 | 86H | B98% | D63% | 71 dBB5% | — | 32/2014 |
| 185/70R13 | 86H | B99% | D61% | 70 dBB80% | — | 20/2016 |
| 14″ rims | ||||||
| 155/80R14 | 81T | B– | D– | 70 dBB– | — | 20/2016 |
| 165/70R14 | 81H | B95% | D60% | 70 dBB70% | — | 20/2016 |
| 175/70R14 | 88H | B97% | D51% | 70 dBB74% | — | 20/2016 |
| 185/70R14 | 88H | B98% | D44% | 70 dBB75% | — | 20/2016 |
| 185/80R14 | 91T | B100% | D76% | 70 dBB76% | — | 20/2016 |
| 195/70R14 | 91H | B97% | D45% | 71 dBB62% | — | 20/2016 |
| 205/70R14 | 95H | B99% | D37% | 71 dBB70% | — | 16/2015 |
| 15″ rims | ||||||
| 135R15 | 73T | B– | D– | 70 dBB– | — | 28/2018 |
| 145R15 | 77T | B– | D– | 70 dBB– | — | 24/2018 |
| 165/80R15 | 87T | B100% | D55% | 70 dBB50% | — | 20/2016 |
Best-labelled summer tyres in 175/70R14
Other tyres on sale in the same size, sorted by wet grip, then noise, then fuel efficiency.
All tyres in 175/70 R14, ranked by label →
- Autogreen SportChaser-SC2A D 66 dB
- Nexen N'blue HD PlusA B 67 dB
- Arivo Premio Eco 6A C 67 dB
- Doublestar Maximum DH08A C 67 dB
- Crossleader Maximum DH08A C 67 dB
- Envoy AternaA D 67 dB
Questions
Is the Nankang CX668 a quiet tyre?
Its declared rolling noise ranges from 70 dB to 71 dB (median 70 dB). In 36% of the sizes we could compare, it is at least as quiet as three quarters of same-size rivals.
How good is the Nankang CX668 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 Nankang CX668 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 Nankang CX668 launched?
It has been on the EU market since July 2014. The earliest production week in its registrations is 32/2014; the DOT code on the sidewall shows the week and year of your tyre.
More from Nankang
Source: EPREL, the European Commission’s product registry for energy labelling — 17 registrations, data as of 23 October 2026. Suppliers have updated 17 of these registrations since first publication. Label values are the supplier’s declaration.