Tire size comparison 225/45 R17 vs 225/40 R18 Calculate CM INCHES If your speedometer reads: Real speed is: Size difference between 225/45 R17 and 225/40 R18 tires. In the tire comparison table above, you can see a detailed calculation of the size difference between 225/45 R17 and 225/40 R18 tire. Yokohama BluEarth-GT AE51 product description & features. Successor to BluEarth-GT AE50. Designed as Grand Touring tyre with excellent all-round performance. Improved fuel efficiency & wet grip. Specially designed asymmetrical tread pattern delivers a more comfortable ride. Unique compound prevents energy loss & uneven wear. The Barum Bravuris 5HM is an ultra-high performance tire that delivers responsive handling, strong grip and unbeatable value—available exclusively at Discount Tire. Barum is known for its ability to manufacture dynamic performance tires using methods that cut unnecessary costs, which it uses to pass savings on to enthusiasts. 235/45 R17 94W: 643mm--245/40 R17 95W: 628mm--245/45 R17 95Y: 636mm--18" 215/40 R18 89W: 629mm--215/45 R18 93W: 651mm--225/40 R18 92Y: 637mm--225/45 R18 95W 225/45-R17 tires are 1.53 inches (38.9 mm) smaller in diameter than 240/45-R18 tires and the speedometer difference is 5.8%. 3rd: 2018 Auto Review 225/45 R17 Tyre Test (225/45 R17) 5th: 2018 ADAC Summer Tyre Test - 205/55 R16 (205/55 R16) 5th: 2018 AZ Summer AND All Season Tyre Test (225/45 R17) 7th: 2018 Gute Fahrt Summer Tyre Test (205/55 R16) 2017 Tyre Tests; 2nd: 2017 Auto Bild Summer Tyre Shootout (225/50 R17) 4th: 2017 ACE SUV Summer Tyre Test (215/60 R17) KTRUhG0.

225 45 r17 vs 225 40 r18