Westlake ZuperSnow Z 507 vs Semperit Speed Grip 5
In the 2 independent tests that ran both tires, the Semperit Speed Grip 5 finished ahead 2 times and the ZuperSnow Z 507 not once. The Speed Grip 5 was stronger in wet.
Every measurement, side by side
Averages of the figures both tires posted in the same tests. The gap is the average of each test's own gap, so figures from different cars and years are never mixed. Wins count the tests in which each tire did better.
| Measurement | ZuperSnow Z 507 | Gap | Speed Grip 5 | Wins |
|---|---|---|---|---|
| Wet Speed Grip 5 ahead | ||||
| Wet Braking ft | 140 | 13% | 122 | 0-2 |
Braking distances and lap times are better when lower; speeds, wear and grip figures when higher. A test's figures are its own: sizes, cars, surfaces and temperatures differ from one to the next, which is why the averages here are only ever of tests the two tires shared.
Head to head in 2 tests, 2023 to 2026
Each row is one published test in which both tires ran on the same car, in the same size, on the same day. The line is the whole field, winner on the left.
| Test | ZuperSnow Z 507 | Field | Speed Grip 5 |
|---|---|---|---|
| 2026 Winter Tire Braking Test - 50 Sets | P37 of 50 | P13 of 50 | |
| 2023 Winter Tire Test 54 Set Braking Test | P43 of 54 | P19 of 54 |
ZuperSnow Z 507 vs Speed Grip 5: your questions
Is the Westlake ZuperSnow Z 507 or the Semperit Speed Grip 5 the better tire?
In the 2 independent tests that ran both tires, the Semperit Speed Grip 5 finished ahead 2 times and the ZuperSnow Z 507 not once. On the Tire Reviews Score, which weighs every test and review we hold, the ZuperSnow Z 507 scores 6.6 and the Speed Grip 5 8.5 out of 10.
Which is better in the wet, the ZuperSnow Z 507 or the Speed Grip 5?
The Speed Grip 5 led 2 of the 2 wet measurements the shared tests recorded. On average it stopped 13% shorter in the wet across 2 tests.
Which is quieter and more comfortable?
Owners rate comfort 8/10 for the ZuperSnow Z 507 and 8.3/10 for the Speed Grip 5.
What do owners say?
Owners rate the ZuperSnow Z 507 66% from 1 reviews and the Speed Grip 5 92% from 3.
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Run either of these?
Your review is the part of this page no test can supply: how the tire wore, how it aged, what it was like in the rain in year three. It takes about five minutes.
Where this data comes from
Finishing positions and measurements are transcribed from each published test. A test only counts here when both tires ran in it, so every figure was recorded on the same car, size and day as the one it is compared to.
About the TR Score
The Tire Reviews Score rates each tire out of 10 from every independent test result and vetted owner review we hold, so two tires can be compared even before a test has run them together.
Who does the testing
Every test published as a Tire Reviews test is run by Jonathan Benson, who has been testing tires independently since 2007.