Thedifference in sizes and parameters between the 235/40 R18 tire and 255/35 R18 tire. Detailed calculations and graphics. Tire calculator online . Top comparisons; 245/40 R18: 235/45 R18: 265/35 R18: Sizes often compared to the 255/35 R18 tire: 225/40 R18: 245/40 R18: 205/55 R16: 27540-R18 tires are 0.02 inches (0.5 mm) smaller in diameter than 245/45-R18 tires and the speedometer difference is 0.1%. 24545-R18 tires are 0.35 inches (9 mm) smaller in diameter than 255/45-R18 tires and the speedometer difference is 1.3%. Thedifference in sizes and parameters between the 225/40 R18 tire and 235/45 R18 tire. Detailed calculations and graphics. 24540-R18 tires are 0.96 inches (24.5 mm) larger in diameter than 245/35-R18 tires and the speedometer difference is 3.8%. . Inthe tire comparison table above, you can see a detailed calculation of the size difference between 215/45 R18 and 225/40 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with Inthe tire comparison table above, you can see a detailed calculation of the size difference between 275/40 R18 and 275/45 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 275/40 R18 is on top, and tire with size 275/45 R18 below. Both in the table and in the graph, the tires are A6/ S6 (C6 Platform) Discussion - 2005 Audi A6 245/40/r18 vs. 235/45/r18 - Hello, This is my first time owning a car so I had a few questions that I think may be simple? I recently had to change all my tires and the shop put on 235/45/r18 when I used to have 245/40/r18. Now my spare is still 245/40/r18 while the rest 24545-R17 tires are 0.28 inches (7.1 mm) larger in diameter than 235/40-R18 tires and the speedometer difference is 1.1% Thecalculation results are presented in the form of visual infographics, on which tire with size 225/45 R18 is on top, and tire with size 225/40 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.

235 45 r18 vs 245 40 r18