245/35R21
Standard MetricFactory Specs, Physical Dimensions & Compatible Vehicle Applications
Factory Spec Overview
The 245/35R21 tire size features an overall diameter of 27.75 inches, a section width of 9.6 inches (245mm), and rotates 727 times per mile. It is a standard factory tire fitment on 55+ vehicle models including BMW Alpina.
Physical Dimensions & Specs
Overall Diameter
27.75"
704.8 mmSection Width
245 mm
9.65" wideSidewall Height
3.38"
85.9 mm (35% aspect)Revolutions / Mile
727
Circumference: 87.19"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 245/35R21 against any proposed tire size below:
Popular Comparisons:
Tire 1 (Stock / Base)245/35R21
Overall Height:27.8"
Sidewall:3.4"
Revs/Mile:727
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682
Visual Tire & Wheel Comparison
Speedometer Variance
+6.6%At 60 mph reading, actual speed is 63.9 mph
| Indicated | Actual Speed | Diff |
|---|---|---|
| 20 mph | 21.3 mph | +1.3 mph |
| 30 mph | 32.0 mph | +2.0 mph |
| 45 mph | 48.0 mph | +3.0 mph |
| 60 mph | 63.9 mph | +3.9 mph |
| 75 mph | 79.9 mph | +4.9 mph |
| 90 mph | 95.9 mph | +5.9 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:+0.91" ground clearance
Vehicles That Fit 245/35R21 (55+ Models)
Factory standard and optional vehicle fitments utilizing 245/35R21 tires: