Tire size
185/70 R14
Full dimensions and a live comparison calculator for the 185/70 R14 tire size.
Overall diameter
614.6 mm
24.20″
Sidewall height
129.5 mm
Circumference
1.931 m
Revs / km
517.9
Section width
185 mm
Aspect ratio
70%
Rim diameter
14″
355.6 mm
Radius
307.3 mm
What does 185/70 R14 mean?
The 185 is the section width in millimetres, measured sidewall to sidewall. The 70 is the aspect ratio — sidewall height as a percentage of width, so the sidewall here is 129.5 mm. The R14 means a radial-construction tire designed for a 14-inch wheel rim. Together these give an overall diameter of 615 mm.
Compare 185/70 R14 with another size
Current Tire
New Tire
Ground line · scaled comparison
Slight Difference
Within ±5% — usable, recalibration recommended
Diameter change
+19.7 mm
3.21%
Speedometer at 100
103.2 km/h
+3.21% error
Ground clearance
+9.9 mm
ride height delta
Sidewall change
-28.3 mm
revs/km: 501.8
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/compare/185-70-r14-vs-225-45-r17Common alternatives to 185/70 R14
These sizes are within a few percent overall diameter — usually safe on the same vehicle from a speedometer-error standpoint.
Compare 185/70 R14 with popular upgrades
Plus-size upgrades from 185/70 R14
Fitment safety note
Overall diameter, speedometer error and circumference are only part of the picture. Physical clearance, wheel offset (ET), hub bore, suspension geometry, load index and your manufacturer's recommendation all decide whether a size is truly safe on your car. Always cross-check with the vehicle manual or a qualified fitter before changing tire size.