315/35R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
The 315/35R21 tire size features an overall diameter of 29.68 inches, a section width of 12.4 inches (315mm), and rotates 679 times per mile. It is a standard factory tire fitment on 70+ vehicle models including BMW X5 M, BMW X6 M.
Physical Dimensions & Specs
Overall Diameter
29.68"
753.9 mmSection Width
315 mm
12.40" wideSidewall Height
4.34"
110.2 mm (35% aspect)Revolutions / Mile
679
Circumference: 93.25"Rim Diameter
21"
Wheel sizeRecommended Rim Width
7.9" - 11"
Optimal rim width rangeWhere to Buy & Install 315/35R21 Tires
Looking for 315/35R21 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:
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Speedometer & Alternate Size Calculator
Testing an alternate size for your vehicle? Compare 315/35R21 against any proposed tire size below:
Visual Tire & Wheel Comparison
Speedometer Variance
| 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
Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.
Vehicles That Fit 315/35R21 (70+ Models)
Factory standard and optional vehicle fitments utilizing 315/35R21 tires: