2018 is setting up to be an excellent year for tyre testing, with the epic German publication Auto Bild already delivering three excellent tests. Of the three, this 20" tyre test is perhaps the most interesting of the trio.
For this investigation, Auto Bild have bought eight 245/30 R20 tyre patterns and placed them through the usual array of wet and dry tests using a Mercedes E Class.
While the internet favourite Michelin Pilot Sport 4S takes its traditional top spot, there is a strange result for the Continental Sport Contact 6, a great result for the ten year old Goodyear Eagle F1 Asymmetric 2 (not 3!), and Bridgestone make a return to tests with the old Potenza S001.
Read on for the full results!
Dry
In the dry the Michelin and Vredestein duke it out for the top spot. The Vredestein Ultrac Vorti R often proves to be an excellent dry weather tyre, with good grip and excellent feedback, and it proves that again here, fastest over dry handling and second best during dry braking. The Michelin has a 0.7 metre lead in dry braking, which is comparatively large when you consider only a metre covers the next four places.
The Nankang finishes last in both tests, a huge four metres behind the Michelin during dry braking, which when braking down from 62 mph would be the difference between stopping, and a 25 mph crash!
Dry Braking
Dry braking in meters
Lower is better ↓| Position / Tyre | Result | Gap to best |
|---|---|---|
| 35.9 m | Best | |
| 36.6 m | +0.70 m | |
| 36.8 m | +0.90 m | |
| 36.9 m | +1.00 m | |
| 37.6 m | +1.70 m | |
| 38 m | +2.10 m | |
| 38.7 m | +2.80 m | |
| 39.9 m | +4.00 m |
The difference between best and worst was 11.1% (4 m ≈ 0.9 Car Lengths).
Dry Handling
Dry Handling Average Speed
Higher is better ↑| Position / Tyre | Result | Gap to best |
|---|---|---|
| 89.6 km/h | Best | |
| 89.2 km/h | -0.40 km/h | |
| 89.2 km/h | -0.40 km/h | |
| 88.5 km/h | -1.10 km/h | |
| 87.7 km/h | -1.90 km/h | |
| 87.5 km/h | -2.10 km/h | |
| 85.5 km/h | -4.10 km/h | |
| 85.2 km/h | -4.40 km/h |
The difference between best and worst was 4.9% (4.4 Km/H).
Wet
The wet testing shows the strength of the Michelins all round ability, with the Pilot Sport 4 S winning both the wet braking and wet handling tests. Its dry weather rival, the Vorti R manages a strong wet lap, but slips in the wet braking testes to fifth. The Nankang again finishes both tests last.
Wet Braking
Wet braking in meters
Lower is better ↓| Position / Tyre | Result | Gap to best |
|---|---|---|
| 45.2 m | Best | |
| 46.7 m | +1.50 m | |
| 47.3 m | +2.10 m | |
| 48.6 m | +3.40 m | |
| 49.5 m | +4.30 m | |
| 51.4 m | +6.20 m | |
| 51.7 m | +6.50 m | |
| 56.4 m | +11.20 m |
The difference between best and worst was 24.8% (11.2 m ≈ 2.5 Car Lengths).
Wet Handling
Wet Handling Average Speed
Higher is better ↑| Position / Tyre | Result | Gap to best |
|---|---|---|
| 75.3 km/h | Best | |
| 74.7 km/h | -0.60 km/h | |
| 74.4 km/h | -0.90 km/h | |
| 74.3 km/h | -1.00 km/h | |
| 73.8 km/h | -1.50 km/h | |
| 71.1 km/h | -4.20 km/h | |
| 69.5 km/h | -5.80 km/h | |
| 66.6 km/h | -8.70 km/h |
The difference between best and worst was 11.6% (8.7 Km/H).
Aquaplaning testing as very different test, with the Nankang winning the test by a considerable margin, the Michelin only managing third place and the Vredestein finishing second to last.
Straight Aqua
Float Speed in Km/H
Higher is better ↑| Position / Tyre | Result | Gap to best |
|---|---|---|
| 75.5 km/h | Best | |
| 73.2 km/h | -2.30 km/h | |
| 70.3 km/h | -5.20 km/h | |
| 70.3 km/h | -5.20 km/h | |
| 69.7 km/h | -5.80 km/h | |
| 69 km/h | -6.50 km/h | |
| 68.3 km/h | -7.20 km/h | |
| 67.8 km/h | -7.70 km/h |
The difference between best and worst was 10.2% (7.7 Km/H).
Environmental
The Continental proved to be the quietest tyre on test, but it also used the most fuel. The Michelin Pilot Sport 4 S was the nosiest.
Rolling Resistance
Rolling resistance in kg t
Lower is better ↓| Position / Tyre | Result | Gap to best | Extra fuel / year |
|---|---|---|---|
| 9.38 kg/t | Best | £0 | |
| 9.58 kg/t | +0.20 kg/t | £9 | |
| 9.61 kg/t | +0.23 kg/t | £11 | |
| 9.79 kg/t | +0.41 kg/t | £19 | |
| 9.83 kg/t | +0.45 kg/t | £21 | |
| 9.88 kg/t | +0.50 kg/t | £23 | |
| 10.13 kg/t | +0.75 kg/t | £35 | |
| 10.64 kg/t | +1.26 kg/t | £59 |
The difference between best and worst was 13.4% (1.26 kg / t). Over 19,000 km a year at £1.45/L, the Continental Sport Contact 6 uses about 41 L (£59) more fuel than the Kumho Ecsta PS71.
Adjust the assumptions
Calculated estimates, not additional measurements. Use the controls to explore the assumptions.
Noise
External noise in dB
Lower is better ↓| Position / Tyre | Result | Gap to best |
|---|---|---|
| 73.3 dB | Best | |
| 73.4 dB | +0.10 dB | |
| 73.6 dB | +0.30 dB | |
| 73.8 dB | +0.50 dB | |
| 74.2 dB | +0.90 dB | |
| 74.2 dB | +0.90 dB | |
| 74.2 dB | +0.90 dB | |
| 74.5 dB | +1.20 dB |
All the tyres in the Noise test finished less than 3% apart.
Results
Full details below, and as always check out the Auto Bild website for all the glorious details (in German)
Michelin Pilot Sport 4 S
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 8 |
| Wet | 8 |
| Comfort | 5 |
| Rolling Resistance | 6 |
| Noise | 5 |
Total: 32
Goodyear Eagle F1 Asymmetric 2
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 7 |
| Wet | 7 |
| Comfort | 7 |
| Rolling Resistance | 6 |
| Noise | 6 |
Total: 33
Hankook Ventus S1 evo
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 7 |
| Wet | 6 |
| Comfort | 5 |
| Rolling Resistance | 6 |
| Noise | 6 |
Total: 30
Vredestein Ultrac Vorti R
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 8 |
| Wet | 6 |
| Comfort | 5 |
| Rolling Resistance | 6 |
| Noise | 7 |
Total: 32
Continental Sport Contact 6
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 7 |
| Wet | 6 |
| Comfort | 5 |
| Rolling Resistance | 4 |
| Noise | 7 |
Total: 29
Bridgestone Potenza S001
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 5 |
| Wet | 4 |
| Comfort | 6 |
| Rolling Resistance | 5 |
| Noise | 6 |
Total: 26
Kumho Ecsta PS71
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 5 |
| Wet | 3 |
| Comfort | 4 |
| Rolling Resistance | 7 |
| Noise | 6 |
Total: 25
Nankang Noble Sport NS20
245/30 R20All discipline results (5)
| Test | Result |
|---|---|
| Dry | 4 |
| Wet | 1 |
| Comfort | 4 |
| Rolling Resistance | 6 |
| Noise | 7 |
Total: 22

Hankook K107 or K117 ? :)
Edited - Balls, it was the Evo 2, I'll update the site now! Thank you :)
Nope, the 20 inch hankook was the k107. The k117 was the 19inch tyre.
I'm travelling a lot at the moment and missing a lot of sleep. I checked the wrong test to confirm. I'll edit it back :)