According to the dealership official down-size for Honda Civic'17 is 205/65/R15 (stock tire size is 215/55/R16), but I have 195/65/R15 winters from a previous year Civic.
I understand that 195 tires will set off the speedometer slightly, since they are about 1/2'' shorter.
What I am wondering is if there chance of damaging the car with these slightly smaller tires, or can I get through the winter with light use (say 5,000k)?