285/50R18
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 285/50R18 tire size features an overall diameter of 29.22 inches, a section width of 11.2 inches (285mm), and rotates 690 times per mile. It is a standard factory tire fitment on 4+ vehicle models including Mercedes-Benz ML55.
Physical Dimensions & Specs
Overall Diameter
29.22"
742.2 mmSection Width
285 mm
11.22" wideSidewall Height
5.61"
142.5 mm (50% aspect)Revolutions / Mile
690
Circumference: 91.8"Rim Diameter
18"
Wheel sizeRecommended Rim Width
7.1" - 10"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 285/50R18 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)285/50R18
Overall Height:29.2"
Sidewall:5.6"
Revs/Mile:690
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+1.2%At 60 mph reading, actual speed is 60.7 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 20.2 mph | +0.2 mph |
| 30 mph | 30.4 mph | +0.4 mph |
| 45 mph | 45.5 mph | +0.5 mph |
| 60 mph | 60.7 mph | +0.7 mph |
| 75 mph | 75.9 mph | +0.9 mph |
| 90 mph | 91.1 mph | +1.1 mph |
Fender & Suspension Clearance
Fitment Status: MODERATE RISK
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Inner Strut Space:7.7mm LESS clearance
Outer Fender Push:Extends 17.7mm further out
Ride Height Delta:+0.18" ground clearance
Vehicles That Fit 285/50R18 (4+ Models)
Factory standard and optional vehicle fitments utilizing 285/50R18 tires: