Barum Polaris 6 is a winter tyre made in total of 78 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/40 R18 is 70mm wider than the narrowest dimension (155) and 30mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (225mm), which results in 90mm sidewall height. In 225/40 R18, there is only one possible speed index for Barum Polaris 6 - "V", which is good for speeds up to 240 km/h. In 225/40 R18, Polaris 6 usually competes against Speed-Grip 5, which is a tyre from Semperit with a rating of 78%, compared to 83% of the Barum in question. Latest test in 225/40 R18 was held by Autobild in 2025, where Polaris 6 received rating "Good" and finished on the 9. place. It was tested on a BMW M135i.
Relevant tyre tests in same or similiar dimension (225/40 R18)

| Name | Wet | Snow | |||||
|---|---|---|---|---|---|---|---|
| Best values in test | 32.6 | 27.1 | |||||
| Barum Polaris 6 | 35.1 | 28.2 | |||||
| Show test details | |||||||

| Name | Wet | Dry | Snow | Running costs | |||
|---|---|---|---|---|---|---|---|
| Best values in test | 2+ | 2+ | 1– | 1 | |||
| Barum Polaris 6 | 3 | 2– | 2+ | 2+ | |||
| Show test details | |||||||