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175/55 R15 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 R15, which means it fits to a 15 inch/381mm diameter wheel. 175/55 R15 is 20mm wider than the narrowest dimension (155) and 20mm narrower than the widest one (195). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (175mm), which results in 96.25mm sidewall height. In 175/55 R15, there is only one possible speed index for Continental UltraContact - "T", which is good for speeds up to 190 km/h.
Continental UltraContact is made in 80 sizes, starting from 155/70 R14 up to 195/55 R20.