Cst ACP1
All-season tyre · type inferred
Cst ACP1 175/65 R14: braking distance on a wet road from 90 km/h is about 44 m (Hyundai i10 III (2019+), without reaction time; based on an independent test · Pidurdusmaa.ee)
On ice from 50 km/h about 132.1 m (based on an independent test)
Independent tests
Measured results. Rank = position in the same test on the same surface (1 = shortest braking distance).
| Test | Surface and speed | Result | Rank | Best |
|---|---|---|---|---|
| ADAC all-season tyre test 2025 | dry asphalt, 100→0 km/h | 44.7 m | 15 / 16 | 38.0 m |
| ADAC all-season tyre test 2025 | wet asphalt, 80→0 km/h | 36.6 m | 13 / 16 | 31.3 m |
| ADAC all-season tyre test 2025 | wet concrete, 80→0 km/h | 44.4 m | 13 / 16 | 38.4 m |
| ADAC all-season tyre test 2025 | snow, 30→0 km/h | 9.6 m | 11 / 16 | 9.0 m |
| ADAC all-season tyre test 2025 | ice, 20→0 km/h | 18.7 m | 16 / 16 | 14.2 m |
| ADAC all-season tyre test 2025 | aquaplaning speed (higher is better) | 75.4 km/h | – | – |
Test: 225/45 R17. The same tyre may perform slightly differently in another size.
Magazine tests
Published braking distances (Auto Bild, auto motor und sport, Auto Zeitung, ADAC, Za Rulem and others). Rank = position in the same test on the same surface (1 = shortest). The tests use different sizes, cars and conditions, so only compare numbers within the same test.
| Test | Size | Conditions | Result | Rank | Best |
|---|---|---|---|---|---|
| ADAC 2025 | 225/45 R17 | ice 20→0 km/h | 18.7 m | 16 / 16 | 14.2 m |
| ADAC 2025 | 225/45 R17 | dry asphalt 100→0 km/h | 44.7 m | 15 / 16 | 38.0 m |
| ADAC 2025 | 225/45 R17 | snow 30→0 km/h | 9.6 m | 11 / 16 | 9.0 m |
| ADAC 2025 | 225/45 R17 | wet asphalt 80→0 km/h | 36.6 m | 13 / 16 | 31.3 m |
| ADAC 2025 | 225/45 R17 | wet concrete 80→0 km/h | 44.4 m | 13 / 16 | 38.4 m |
| Auto Bild 2023 | 225/45 R17 | dry asphalt 100→0 km/h | 44.2 m | 31 / 35 | 37.7 m |
| Auto Bild 2023 | 225/45 R17 | wet asphalt 100→0 km/h | 54.4 m | 24 / 35 | 45.0 m |
| Auto Bild 2022 | 195/55 R16 | dry asphalt 100→0 km/h | 46.6 m | 27 / 35 | 39.9 m |
| Auto Bild 2022 | 195/55 R16 | wet asphalt 100→0 km/h | 53.0 m | 15 / 35 | 44.4 m |
| Auto Bild 2021 | 225/50 R17 | dry asphalt 100→0 km/h | 44.3 m | 28 / 32 | 37.6 m |
| Auto Bild 2021 | 225/50 R17 | wet asphalt 100→0 km/h | 57.5 m | 24 / 32 | 50.0 m |
The calculation on this page does not use these results: our check showed that a test in another size does not predict wet braking better than the EU label for your size. They are shown here as measured facts.
EU tyre label
Official data from the EU product register EPREL, by size. The class applies to each size separately. What do the classes mean?
| Size | Wet grip | Rolling resistance | Noise | Winter | Load / speed |
|---|---|---|---|---|---|
| 155/65 R13 | C | D | 71 dB (B) | snow symbol | 73 T |
| 155/65 R14 | C | D | 71 dB (B) | snow symbol | 75/79 T |
| 155/70 R13 | C | D | 71 dB (B) | snow symbol | 75 T |
| 155/80 R13 | C | C | 71 dB (B) | snow symbol | 83 T |
| 165/65 R14 | C | D | 71 dB (B) | snow symbol | 79/83 H/T |
| 165/65 R15 | C | D | 71 dB (B) | snow symbol | 81 H/T |
| 165/70 R13 | C | D | 71 dB (B) | snow symbol | 79 T |
| 165/70 R14 | C | D | 71 dB (B) | snow symbol | 81 T |
| 175/55 R15 | B | D | 71 dB (B) | snow symbol | 77 H |
| 175/60 R15 | B | D | 71 dB (B) | snow symbol | 81 H |
| 175/65 R14 | B | C | 71 dB (B) | snow symbol | 82 T |
| 175/65 R15 | B | D | 71 dB (B) | snow symbol | 88 H |
| 175/70 R14 | B | D | 71 dB (B) | snow symbol | 88 H/T |
| 185/50 R16 | B | D | 71 dB (B) | snow symbol | 81 V |
| 185/55 R15 | B | C | 71 dB (B) | snow symbol | 82 H |
| 185/60 R14 | B | D | 71 dB (B) | snow symbol | 82 H |
| 185/60 R16 | B | C | 71 dB (B) | snow symbol | 86 V |
| 185/65 R14 | B | D | 71 dB (B) | snow symbol | 86 H |
| 195/45 R16 | B | D | 71 dB (B) | snow symbol | 84 V |
| 195/50 R15 | B | D | 71 dB (B) | snow symbol | 86 V |
| 195/55 R15 | B | D | 71 dB (B) | snow symbol | 89 V |
| 195/55 R16 | B | C | 71 dB (B) | snow symbol | 91 V |
| 195/60 R15 | B | C | 71 dB (B) | snow symbol | 88 H |
| 205/45 R16 | B | D | 71 dB (B) | snow symbol | 87 V |
| 205/45 R17 | B | D | 71 dB (B) | snow symbol | 88 V/W |
| 205/50 R17 | B | D | 71 dB (B) | snow symbol | 93 V/W |
| 205/55 R17 | B | C | 71 dB (B) | snow symbol | 95 V |
| 215/45 R17 | B | D | 71 dB (B) | snow symbol | 91 V/W |
| 215/50 R17 | B | D | 71 dB (B) | snow symbol | 95 V/W |
| 215/55 R16 | B | C | 71 dB (B) | snow symbol | 97 V |
| 215/55 R17 | B | C | 71 dB (B) | snow symbol | 98 V/W |
| 215/55 R18 | B | C | 71 dB (B) | snow symbol | 99 V |
| 225/40 R18 | B | D | 71 dB (B) | snow symbol | 92 V/W |
| 225/45 R17 | B | C | 71 dB (B) | snow symbol | 94 V/W |
| 225/45 R18 | B | D | 71 dB (B) | snow symbol | 95 V/W |
| 225/50 R17 | B | C | 71 dB (B) | snow symbol | 98 V/W |
| 225/50 R18 | B | C | 71 dB (B) | snow symbol | 99 V/W |
| 225/55 R16 | B | D | 71 dB (B) | snow symbol | 99 V |
| 225/55 R17 | B | C | 71 dB (B) | snow symbol | 101 W |
| 225/55 R18 | B | C | 71 dB (B) | snow symbol | 102 W |
| 235/45 R18 | B | D | 71 dB (B) | snow symbol | 98 W |
| 235/50 R17 | B | C | 71 dB (B) | snow symbol | 100 V |
| 235/50 R18 | B | C | 71 dB (B) | snow symbol | 101 V/W |
| 235/55 R17 | B | C | 71 dB (B) | snow symbol | 103 V |
| 235/55 R18 | B | C | 71 dB (B) | snow symbol | 104 V/W |
| 235/55 R19 | B | C | 71 dB (B) | snow symbol | 105 V/W |
| 245/40 R18 | B | D | 71 dB (B) | snow symbol | 97 V/W |
| 245/40 R19 | B | C | 71 dB (B) | snow symbol | 98 W |
| 245/45 R18 | B | D | 71 dB (B) | snow symbol | 100 V/W |
| 245/45 R19 | B | C | 71 dB (B) | snow symbol | 102 W |
| 255/50 R19 | B | C | 71 dB (B) | snow symbol | 107 V/W |
Frequently asked questions
What is the wet grip class of the Cst ACP1?
On the EU tyre label, the Cst ACP1 has wet grip class B to C, depending on the size. A is the best and E the worst. The difference between class A and class E is about 18 m of braking distance from 90 km/h on a wet road.
How long is the braking distance of the Cst ACP1 on a wet road?
According to the Pidurdusmaa.ee calculation, the Cst ACP1 175/65 R14 stops from 90 km/h on a wet road in about 44 metres (Hyundai i10 III (2019+), without reaction time). The calculation is based on an independent test.
Is the Cst ACP1 suitable for an Estonian winter?
Better suited to city driving. The Cst ACP1 is an all-season tyre, a compromise between summer and winter. On ice and snow it needs a longer braking distance than a Nordic friction or studded tyre.
How long is the braking distance of the Cst ACP1 on ice?
Based on an independent test, the Cst ACP1 175/65 R14 stops from 50 km/h on ice in about 132.1 metres (Hyundai i10 III (2019+), without reaction time). Calculated by Pidurdusmaa.ee with the same model as the calculator. Use the calculator to see the result for your own car.
Has the Cst ACP1 been independently tested?
Yes. Source: Auto Bild 2022. The Cst ACP1 stopped on wet asphalt from 100 km/h in 53.0 m, ranking 15 of 35 tyres. All measured results are in the table above.
What sizes is the Cst ACP1 available in?
In the EU tyre register, our database has the Cst ACP1 in 51 sizes, for example 155/65 R13, 155/65 R14, 155/70 R13, 155/80 R13, 165/65 R14 and 165/65 R15. As a main factory size it fits cars such as the Audi A6 C9 (2025+), BYD Seal 6 (2025+) and Chery Tiggo 7 (2025+).
Compare within the same test
Tyres that were neighbours in the same test: same car, same day.