Michelin Primacy 4+ is a summer tyre made in total of 123 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/55 R18 is 40mm wider than the narrowest dimension (185) and 20mm narrower than the widest one (245). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (225mm), which results in 123.75mm sidewall height. In 225/55 R18, there is only one possible speed index for Michelin Primacy 4+ - "V", which is good for speeds up to 240 km/h. In 225/55 R18, Primacy 4+ usually competes against Turanza T005, which is a tyre from Bridgestone with a rating of 88%, compared to 76% of the Michelin in question.
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Relevant tyre tests in same or similiar dimension (225/55 R18)

| Name | |||||||
|---|---|---|---|---|---|---|---|
| Michelin Primacy 4+ | |||||||
| Show test details | |||||||

| Name | Points total | Wet | Dry | Rolling resistance | Noise | ||
|---|---|---|---|---|---|---|---|
| Best values in test | 214 | 47 | 92 | 13 | 5 | ||
| Michelin Primacy 4+ | 204 | 65 | 116 | 17 | 6 | ||
| Show test details | |||||||

| Name | |||||||
|---|---|---|---|---|---|---|---|
| Michelin Primacy 4+ | |||||||
| Show test details | |||||||

| Name | Wet | Dry | Rolling resistance | Noise | |||
|---|---|---|---|---|---|---|---|
| Best values in test | 1- | 2+ | 2+ | 2+ | |||
| Michelin Primacy 4+ | 2 | 2+ | 2 | 2 | |||
| Show test details | |||||||