245/75R18
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 245/75R18 tire size features an overall diameter of 32.47 inches, a section width of 9.6 inches (245mm), and rotates 621 times per mile. It is a standard factory tire fitment on 16+ vehicle models including Toyota Tundra.
Physical Dimensions & Specs
Overall Diameter
32.47"
824.7 mmSection Width
245 mm
9.65" wideSidewall Height
7.23"
183.6 mm (75% aspect)Revolutions / Mile
621
Circumference: 102"Rim Diameter
18"
Wheel sizeRecommended Rim Width
6.1" - 8.6"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 245/75R18 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)245/75R18
Overall Height:32.5"
Sidewall:7.2"
Revs/Mile:621
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
-8.9%At 60 mph reading, actual speed is 54.7 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 18.2 mph | -1.8 mph |
| 30 mph | 27.3 mph | -2.7 mph |
| 45 mph | 41.0 mph | -4.0 mph |
| 60 mph | 54.7 mph | -5.3 mph |
| 75 mph | 68.3 mph | -6.7 mph |
| 90 mph | 82.0 mph | -8.0 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:-1.45" lower ground clearance
Vehicles That Fit 245/75R18 (16+ Models)
Factory standard and optional vehicle fitments utilizing 245/75R18 tires: