Giti GitiSynergyH2 vs Michelin Primacy 5
Ahead in each discipline
The Giti GitiSynergyH2 and the Michelin Primacy 5 have met in one independent test so far, and the Primacy 5 finished ahead. The GitiSynergyH2 was stronger in dry and value, the Primacy 5 in wet and comfort.
Performance profile
10 measurements from the one shared test, each tyre shown as its share of the better figure.
Where each is furthest ahead
GitiSynergyH2
Primacy 5
Point at or tap any spoke for both tyres' figures.
In each test the better of the two figures counts as 100% and the other as its share of it, so a 36 m stop against 34.2 m is 95%; each spoke averages the shared tests that recorded it. The scale stops at 90%: a point further in sits on the hub's edge, hollow.
Where each scores higher
GitiSynergyH2
Not ahead in any category
Primacy 5
Point at or tap any spoke for both tyres' figures.
Category scores are percentiles among tyres of the same season and class: 90 means this tyre out-performs 90% of them, measured across every test we hold, not only the ones it appeared in.
Where owners rate each higher
GitiSynergyH2
Not ahead in any category
Primacy 5
Point at or tap any spoke for both tyres' figures.
Owners rate the GitiSynergyH2 68% from 22 reviews and the Primacy 5 83% from 63. Each spoke is one question owners answer out of 10; reviews are vetted by hand before publication.
Every measurement, side by side
Both tyres' figures from the one test that ran them together, on the same car, in the same size, on the same day. The bar grows towards the tyre that did better.
| Measurement | GitiSynergyH2 | Gap | Primacy 5 |
|---|---|---|---|
| Dry GitiSynergyH2 ahead | |||
| Dry Braking m | 36.4 | 1.9% | 37.1 |
| Dry Handling km/h | 107.2 | 0.7% | 106.5 |
| Wet Primacy 5 ahead | |||
| Wet Braking m | 43.8 | 11.4% | 38.8 |
| Wet Handling km/h | 53 | 3.2% | 54.7 |
| Wet Circle m/s | 7.63 | 0.3% | 7.61 |
| Straight Aqua km/h | 84 | 9.6% | 92.1 |
| Curved Aquaplaning m/sec2 | 3.56 | 23.9% | 4.41 |
| Comfort Primacy 5 ahead | |||
| Noise dB | 69.5 | 0.5 dB | 69 |
| Value GitiSynergyH2 ahead | |||
| Rolling Resistance kg / t | 6.6 | 8.3% | 7.2 |
| Energy Consumption kWh/100km | 10.1 | 2.9% | 10.4 |
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 tyres shared.
Head to head in 1 test in 2026
Each row is one published test in which both tyres ran on the same car, in the same size, on the same day. The line is the whole field, winner on the left.
| Test | GitiSynergyH2 | Field | Primacy 5 |
|---|---|---|---|
| 2026 Summer ECO Tyre Test | P8 of 8 | P3 of 8 |
GitiSynergyH2 vs Primacy 5: your questions
Is the Giti GitiSynergyH2 or the Michelin Primacy 5 the better tyre?
The Giti GitiSynergyH2 and the Michelin Primacy 5 have met in one independent test so far, and the Primacy 5 finished ahead. On the Tyre Reviews Score, which weighs every test and review we hold, the GitiSynergyH2 scores 7.2 and the Primacy 5 8.8 out of 10.
Which is better in the wet, the GitiSynergyH2 or the Primacy 5?
The Primacy 5 led 4 of the 5 wet measurements the shared tests recorded.
Which is better in the dry?
The GitiSynergyH2 led 2 of the 2 dry measurements the shared tests recorded.
Which is quieter and more comfortable?
Owners rate comfort 7.1/10 for the GitiSynergyH2 and 8.4/10 for the Primacy 5.
What do owners say?
Owners rate the GitiSynergyH2 68% from 22 reviews and the Primacy 5 83% from 63. 50% of GitiSynergyH2 owners would buy it again, against 78% for the Primacy 5.
Are they available in the same sizes?
The GitiSynergyH2 is made in 50 sizes (14 to 20 inch) and the Primacy 5 in 88 (16 to 22 inch). 29 sizes are available in both. On the EU label the GitiSynergyH2 is graded A for wet grip and C for rolling resistance in most sizes; the Primacy 5 A and B.
Which is the newer tyre?
The Primacy 5 is the newer design: it reached the market in 2025, the GitiSynergyH2 in 2020. The GitiSynergyH2 replaced the Giti GitiPremium H1. The Primacy 5 replaced the Michelin Primacy 4+.
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Run either of these?
Your review is the part of this page no test can supply: how the tyre 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 tyres 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 Tyre Reviews Score rates each tyre out of 10 from every independent test result and vetted owner review we hold, so two tyres can be compared even before a test has run them together.
Who does the testing
Every test published as a Tyre Reviews test is run by Jonathan Benson, who has been testing tyres independently since 2007.