Nokian Powerproof is a summer tyre made in total of 53 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/50 R18 is 40mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (245mm), which results in 122.5mm sidewall height. In 245/50 R18, there are 2 possible speed indexes for Nokian Powerproof - "W","Y", which are good for speeds up to 270, 300 km/h.
Relevant tyre tests in same or similiar dimension (245/50 R18)
AutoMotorSport Summer tyre test 2022 245/45 R19 good Ranked #6 of 10Securing the 6th place among 10 competitors, the Nokian Powerproof tire was recognized with a 'Good' rating, underlining its suitability for daily use across all summer weather conditions, with the only notable shortfalls arising during heavy rain. Testers praised the tire for its neutral to understeering behavior, which remained driver-active with reserves in wet conditions, making it spontaneous, precise, and easy to control in dry turns. However, they noted deficiencies in aquaplaning safety and reported a faint, singing noise during handling. A standout feature of the Nokian Powerproof was its dry steering response, where it performed exceptionally well, setting a benchmark in this discipline. This balance of characteristics makes it a commendable choice for a wide range of summer driving conditions, despite its vulnerabilities in extremely wet weather.