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. Also, the online application calculates the difference in real speed and speedometer readings if the difference between tire 245/40 R19 and tire 255/40 R19 is significant.
225/40-R19 tires are 0.89 inches (22.5 mm) smaller in diameter than 225/45-R19 tires and the speedometer difference is 3.3%.
The 40 series tires roll with less resistance than the 45 series tires because they have
Sidewall and Tire Aspect Ratio 45 vs 55. The ruling difference between 45 and 50 profile tires is in their sidewall. While it is true that the difference between the sidewall and aspect ratio of 45 and 50 profile tires is just 5%, 5% can make a lot of difference. Calculating the 5% percentage differences for a 195mm tire will give a 9.75mm.
235 tires offer less rolling resistance as compared to the 255 Tires. As a result, the 235 offer better gas mileage. Cars using the 235 tires can only carry a lighter load, while the 255 Tires can carry a much higher load. The 235 have a narrower width and are therefore less stable than the 255 tires with a wider width.
In the tire comparison table above, you can see a detailed calculation of the size difference between 245/45 R18 and 245/40 R18 tire. The calculation results are presented in the form of visual infographics, on which tire with size 245/45 R18 is on top, and tire with size 245/40 R18 below. Both in the table and in the graph, the tires are
235/45-R18 tires are 1.24 inches (31.5 mm) larger in diameter than 225/40-R18 tires and the speedometer difference is 4.7%.
278 posts · Joined 2015. #2 · Jun 2, 2016. The 245/40/18 will be just under 1" smaller is total diameter than stock. Meaning the distance from the axle centre line to the bottom of the tire would be just under 0.5" = 0.5" drop of the frame towards the ground. However, your 'fender' gap would also grow by 0.5". 235/55-R18 tires are 1.85 inches (47 mm) larger in diameter than 235/45-R18 tires and the speedometer difference is 6.6%. 235/50-R18 tires are 0.93 inches (23.5 mm) larger in diameter than 235/45-R18 tires and the speedometer difference is 3.4%. 305/45-R22 tires are 1.2 inches (30.5 mm) larger in diameter than 305/40-R22 tires and the speedometer difference is 3.7%. 265/45-R19 tires are 1.04 inches (26.5 mm) larger in diameter than 265/40-R19 tires and the speedometer difference is 3.7%. Yes, 245 and 255 tires are interchangeable. While the recommended rim width range for a 255 tire is typically 7.0 to 9.5 inches, it overlaps with the range of 7 to 8.5 inches for a 245 tire. This means that you can mount a 255 tire on a rim that’s within the 245 tire’s range without any issues. 225/40-R18 tires are 0.11 inches (2.9 mm) larger in diameter than 225/45-R17 tires and the speedometer difference is 0.4%.
275/50-R22 tires are 1.08 inches (27.5 mm) larger in diameter than 275/45-R22 tires and the speedometer difference is 3.3%.
The tires are worn out and I have decided to buy schwalbe marathon plus (since I often had flat tire due to broken glass on bicycle paths in my town) The original tires are Continental Contact 700×37c. Which size of the schwalbe should I choose : 37-622 28x1.40, 700x35C SmartGuard, or; 40-622 28x1.50, 700x38C SmartGuard

Choosing between 40 series and 45 series tires is a decision that should be based on your driving preferences, needs, and the conditions in which you’ll be driving. While 40 series tires offer enhanced performance and a sporty look, 45 series tires prioritize comfort, durability, and fuel efficiency.

275/45-R21 tires are 1.08 inches (27.5 mm) larger in diameter than 275/40-R21 tires and the speedometer difference is 3.5%. 5869. Better Fuel Economy Factory Ratios Increased Power. 245/45-R18 tires are 0.96 inches (24.5 mm) larger in diameter than 245/40-R18 tires and the speedometer difference is 3.6%. C0c3HBH.