Vredestein ULTRAC is a summer tyre made in total of 81 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 80mm wider than the narrowest dimension (175) and 40mm narrower than the widest one (295). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height. In 255/55 R18, there is only one possible speed index for Vredestein ULTRAC - "Y", which is good for speeds up to 300 km/h. Latest test in 255/55 R18 was held by Autobild in 2025, where ULTRAC received rating "Exemplary" and finished on the 2. place. It was tested on a .
Relevant tyre tests in same or similiar dimension (255/55 R18)
Autobild Summer tyre test 2025 255/55 R18 exemplary Ranked #2 of 10Ranking an impressive second place in the test, the Vredestein Ultrac was awarded an "Exemplary" rating. The tire excelled with a perfectly balanced and secure driving performance on various surfaces, boasting strong safety margins in aquaplaning scenarios, short braking distances, good ride comfort, and a quiet noise level during drive-by. It notably topped the competition in sand traction, wet handling, wet braking, and rolling resistance, showcasing a well-rounded capability and superior design among its peers.