GarageCalc What 295/40R19 means
295 is the section width in millimeters (11.6 in). 40 is the aspect ratio: the sidewall is 40 percent of the width, so 295 × 0.40 = 118 mm (4.6 in). R is radial construction, and 19 is the wheel diameter in inches (483 mm). Stack two sidewalls on the wheel and you get the overall diameter: 483 + 2 × 118 = 719 mm, or 28.3 in.
A full marking adds a load index and speed rating after the size, for example 295/40R19 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 295/40R19
Similar diameter does not establish interchangeability. Follow the vehicle manufacturer's approved sizes; see Michelin's tire-size guidance.
Going up one wheel size, the closest match is 305/35R20 at +0.4% diameter with a 107 mm sidewall instead of 118 mm. No common 18-inch size stays within 3 percent either. The 3 percent cutoff is a comparison filter, not a fitment approval. Use vehicle-approved sizes and check rim width, load and speed ratings, and clearances. The comparison calculator shows the full speedometer table for any pair.
Frequently asked questions
How tall is a 295/40R19 tire?
28.3 inches (719 mm) in overall diameter: the 19-inch wheel (483 mm) plus two 118 mm sidewalls. Actual dimensions depend on the tire model, tread depth, pressure and load; check the tire manufacturer specifications.
What is 295/40R19 in inches?
28.3 x 11.6 R19: 28.3 inches tall, 11.6 inches wide, on a 19-inch wheel. The sidewall is 4.6 inches and the circumference is 88.9 inches, so the tire turns 713 times per mile.
What tire sizes are equivalent to 295/40R19?
Within 3 percent of the same diameter on the same 19-inch wheel: 285/40R19 (-1.1%), 275/45R19 (+1.6%), 275/40R19 (-2.2%); on a 20-inch wheel: 305/35R20 (+0.4%), 295/35R20 (-0.6%). The percentage is the diameter change, which is also your speedometer error.