Vredestein Ultrac Satin is a summer tyre made in total of 69 sizes, ranging from R16 to R16 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 245/40 R17 is 40mm wider than the narrowest dimension (205) and -10mm narrower than the widest one (235). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R17, there is only one possible speed index for Vredestein Ultrac Satin - "Y", which is good for speeds up to 300 km/h. In 245/40 R17, Ultrac Satin usually competes against Bravuris 5 HM, which is a tyre from Barum with a rating of 39%, compared to 0% of the Vredestein in question.