2018Q7 20 inch replacement wheels. 1 1. Wheels & Tires Discussion - 245/45/18 on Audi A4? - Hi guys! I'm new to this forum. I'm going to replace the worn out tires (GoodYear Eagle F1 asymmetric 2, 245/40/18) on my Audi A4 B8.5, It's the original size for my car. I will buy the new Eagle F1 asymmetric 3. Thedifference in sizes and parameters between the 235/40 R18 tire and 235/45 R18 tire. Detailed calculations and graphics. Calculate the difference in inches. Tire calculator online . Top comparisons; 245/45 R18: 225/45 R18: 215/60 R16: 245/40 R18: 225/55 R17: 4282posts · Joined 2009. #7 · Mar 25, 2014. The 245/45s you remove from the rear can eventually be placed in the front. Therefore it's not really a waste of $400 to upgrade to the 275/40s for the rear. I say go for it. Our Challengers really should have come with a 275/40 rear from the factory IMO. BetterFuel Economy Factory Ratios Increased Power. vs 235/60-18. 255/55-R18 tires are 0.53 inches (13.5 mm) smaller in diameter than 245/60-R18 tires and the speedometer difference is 1.8%. Thecalculation results are presented in the form of visual infographics, on which tire with size 245/45 R17 is on top, and tire with size 245/40 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. TlQu0t. Matcheswell with the staggered setup of 245/40 R18 and 265/35 R18 on the E350. It may seem to be wearing a little fast for my liking due to a softer compound, but 24545-R18 tires are 1.06 inches (27 mm) larger in diameter than 215/45-R18 tires and the speedometer difference is 4.0%. 24545 R18 100W XL B: B (245/40 R18) on a combination of roads for 5,000 average miles These rear tyres make my normally stable Lexus is350 twitchy. This is really noticeable on adverse cambers, even slight e.g. on a motorway. Alignment is correct and pressure doesn't make much difference. 25535-R18 tires are 0.69 inches (17.5 mm) smaller in diameter than 245/40-R18 tires and the speedometer difference is 2.7%. 24545-R18 tires are 1.65 inches (42 mm) larger in diameter than 255/35-R18 tires and the speedometer difference is 6.2%.

245 45 r18 vs 245 40 r18