TireSize and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 245 is the tire width in millimeters. The 2nd number 40 is used to calculate the sidewall height or "aspect ratio", by percentage. So, the sidewall height of a 245/40 R 18 tire is 60% of 245 = 192. Thecalculation results are presented in the form of visual infographics, on which tire with size 235/40 R18 is on top, and tire with size 235/45 R18 below. Both in the table and in the graph, the tires are compared according to the following indicators: overall diameter, section width, circumference, sidewall height and clearance. Sizesoften compared to the 255/35 R19 tire: 225/40 R19. 255/40 R19. 245/40 R18. 235/40 R19. 225/50 R17. 245/45 R19. The difference in sizes and parameters between the 245/40 R19 tire and 255/35 R19 tire. Detailed calculations and graphics. Inthe tire comparison table above, you can see a detailed calculation of the size difference between 225/40 R19 and 235/55 R19 tire. The calculation results are presented in the form of visual infographics, on which tire with size 225/40 R19 is on top, and tire with size 235/55 R19 below. Both in the table and in the graph, the tires are So the sidewall height of a 235/55 R 18 tire is 60% of 235 = 192. The 3rd number 18 (generally preceded by an "R") is Rim Diameter in inches. This is the diameter of the rims bead seat base, not the diameter of the outer rim edge. The rim edge, or lip, extends past the tire bead seat to hold the bead and stop the tire slipping off the rim. . 22540 R18: 2.2 bar or 32 psi: 2.0 bar or 29 psi: Yaris Cross: 205/65 R16: 2.3 bar or 33 psi: 225/45 R19: 2.3 bar or 33 psi: 2.3 bar or 33 psi: bZ4X: 235/60 R18: 2.6 bar or 38 psi: 2.6 bar or 38 psi: bZ4X: 235/45 R18: 2.4 bar or 35 psi: 2.4 bar or 35 psi: Prius: 195/65 R15: 2.5 bar or 36 psi: 2.4 bar or 35 psi: Prius: 40 18: 61.05 (2' 0.04") 191.8 (6' 3.51") -1%: 215: 45: 17: 60.77 (1' 11.93") 190.9 (6' 3.16") -1.4%: 225: 40: 18: 61.85 (2' 0.35") 194.3 (6' 4.5") 0.3%: 225: 45: 17: 61.56 (2' 0.24") 193.4 (6' 4.14") -0.2%: 225: 50: 16: 61.37 (2' Compare225/45 R18 vs 235/35 R19. Tire Size and Comparison Calculator calculate tire diameter from code and compare speedometer differences for tire sizes. The first number 225 is the tire width in millimeters. The 2nd number 45 is used to calculate the sidewall height or "aspect ratio", by percentage. Thedifference in sizes and parameters between the 245/40 R19 tire and 245/35 R19 tire. Detailed calculations and graphics. Tire calculator online . Top comparisons; 225/50 R17: 245/40 R18: 235/35 R19: 275/30 R19: Inthe tire comparison table above, you can see a detailed calculation of the size difference between 235/40 R19 and 235/35 R20 tire. The calculation results are presented in the form of visual infographics, on which tire with size 235/40 R19 is on top, and tire with size 235/35 R20 below. Both in the table and in the graph, the tires are

225 40 r18 vs 235 35 r19