245/45R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 245/45R21 tire size features an overall diameter of 29.68 inches, a section width of 9.6 inches (245mm), and rotates 679 times per mile. It is a standard factory tire fitment on 12+ vehicle models including Hyundai Santa Fe.
Physical Dimensions & Specs
Overall Diameter
29.68"
753.9 mmSection Width
245 mm
9.65" wideSidewall Height
4.34"
110.2 mm (45% aspect)Revolutions / Mile
679
Circumference: 93.25"Rim Diameter
21"
Wheel sizeRecommended Rim Width
6.1" - 8.6"
Optimal rim width rangeSpeedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 245/45R21 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)245/45R21
Overall Height:29.7"
Sidewall:4.3"
Revs/Mile:679
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
-0.4%At 60 mph reading, actual speed is 59.8 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 19.9 mph | -0.1 mph |
| 30 mph | 29.9 mph | -0.1 mph |
| 45 mph | 44.8 mph | -0.2 mph |
| 60 mph | 59.8 mph | -0.2 mph |
| 75 mph | 74.7 mph | -0.3 mph |
| 90 mph | 89.7 mph | -0.3 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:-0.05" lower ground clearance
Vehicles That Fit 245/45R21 (12+ Models)
Factory standard and optional vehicle fitments utilizing 245/45R21 tires: