GarageCalc What 195/65R15 means
195 is the section width in millimeters (7.7 in). 65 is the aspect ratio: the sidewall is 65 percent of the width, so 195 × 0.65 = 127 mm (5.0 in). R is radial construction, and 15 is the wheel diameter in inches (381 mm). Stack two sidewalls on the wheel and you get the overall diameter: 381 + 2 × 127 = 635 mm, or 25.0 in.
A full marking adds a load index and speed rating after the size, for example 195/65R15 91V. Those two codes set how much weight and speed the tire is certified for; look them up in the load index chart and the speed rating chart.
Plus and minus sizing from 195/65R15
Going up one wheel size, the closest match is 205/55R16 at -0.4% diameter with a 113 mm sidewall instead of 127 mm. Going down one size, 195/70R14 is -0.9% with a taller 137 mm sidewall for more comfort and pothole margin. Anything inside 3 percent keeps the speedometer, ABS and gearing effectively stock; the comparison calculator shows the full speedometer table for any pair.
Which cars come with 195/65R15
Typical factory fitments include Toyota Corolla (2003-2019), Honda Civic (2006-2011), VW Jetta and Golf base trims and Toyota Prius (2010-2015). Tire size changes with trim and wheel option, so confirm on the door-jamb placard before buying.
Frequently asked questions
How tall is a 195/65R15 tire?
25.0 inches (635 mm) in overall diameter: the 15-inch wheel (381 mm) plus two 127 mm sidewalls. Real tires land within about 1 to 2 percent of that depending on brand, tread depth and pressure.
What is 195/65R15 in inches?
25.0 x 7.7 R15: 25.0 inches tall, 7.7 inches wide, on a 15-inch wheel. The sidewall is 5.0 inches and the circumference is 78.5 inches, so the tire turns 807 times per mile.
What tire sizes are equivalent to 195/65R15?
Within 3 percent of the same diameter on the same 15-inch wheel: 215/60R15 (+0.7%), 205/60R15 (-1.2%), 185/65R15 (-2.0%); on a 16-inch wheel: 205/55R16 (-0.4%), 195/60R16 (+0.9%); on a 14-inch wheel: 195/70R14 (-0.9%), 205/70R14 (+1.3%). The percentage is the diameter change, which is also your speedometer error.
Can I use 205/60R15 instead of 195/65R15?
Dimensionally yes: 205/60R15 is 1.2% shorter (-8 mm) and 10 mm wider, and at a true 60 mph the speedometer would read 60.7 mph. The extra width needs about 0.20 in of clearance on each side of the tire and a rim width that suits 205 mm.