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Automotive - tire size

What is the difference between 195/55R16 and 205/50R17 tires?

Answer
+15.9
mm overall diameter
636.8 mm − 620.9 mm = 15.9 mm (2.56%)
How we got there
  1. 01195/55R16: sidewall 107.3 mm, total diameter 620.9 mm
  2. 02205/50R17: sidewall 102.5 mm, total diameter 636.8 mm
  3. 03Difference: 15.9 mm (2.56% — speedometer error in same direction)
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