Vredestein Ultrac Vorti is a summer tyre made in total of 72 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 245/35 R21 is 20mm wider than the narrowest dimension (225) and 50mm narrower than the widest one (295). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (245mm), which results in 85.75mm sidewall height. In 245/35 R21, there is only one possible speed index for Vredestein Ultrac Vorti - "Y", which is good for speeds up to 300 km/h.
