Tire size
145/70 R13
Full dimensions and a live comparison calculator for the 145/70 R13 tire size.
Overall diameter
533.2 mm
20.99″
Sidewall height
101.5 mm
Circumference
1.675 m
Revs / km
597.0
Section width
145 mm
Aspect ratio
70%
Rim diameter
13″
330.2 mm
Radius
266.6 mm
What does 145/70 R13 mean?
The 145 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 101.5 mm. The R13 means a radial-construction tire designed for a 13-inch wheel rim. Together these give an overall diameter of 533 mm.
Compare 145/70 R13 with another size
Current Tire
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Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
+101.1 mm
18.96%
Speedometer at 100
119.0 km/h
+18.96% error
Ground clearance
+50.5 mm
ride height delta
Sidewall change
-0.3 mm
revs/km: 501.8
Permalink for this comparison:
/compare/145-70-r13-vs-225-45-r17Common alternatives to 145/70 R13
These sizes are within a few percent overall diameter — usually safe on the same vehicle from a speedometer-error standpoint.
Compare 145/70 R13 with popular upgrades
Plus-size upgrades from 145/70 R13
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.