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225/45 R18 Continental UltraContact variants
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Continental UltraContact is a summer tyre made in total of 80 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/45 R18 is 70mm wider than the narrowest dimension (155) and -30mm narrower than the widest one (195). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (225mm), which results in 101.25mm sidewall height. In 225/45 R18, there is only one possible speed index for Continental UltraContact - "W", which is good for speeds up to 270 km/h.
Continental UltraContact is made in 80 sizes, starting from 155/70 R14 up to 195/55 R20.
