Tire size
165/55 R16
Full dimensions and a live comparison calculator for the 165/55 R16 tire size.
Overall diameter
587.9 mm
23.15″
Sidewall height
90.8 mm
Circumference
1.847 m
Revs / km
541.4
Section width
165 mm
Aspect ratio
55%
Rim diameter
16″
406.4 mm
Radius
293.9 mm
What does 165/55 R16 mean?
The 165 is the section width in millimetres, measured sidewall to sidewall. The 55 is the aspect ratio — sidewall height as a percentage of width, so the sidewall here is 90.8 mm. The R16 means a radial-construction tire designed for a 16-inch wheel rim. Together these give an overall diameter of 588 mm.
Compare 165/55 R16 with another size
Current Tire
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Ground line · scaled comparison
Not Recommended
Over 5% — speedometer & ABS may misread
Diameter change
+46.4 mm
7.89%
Speedometer at 100
107.9 km/h
+7.89% error
Ground clearance
+23.2 mm
ride height delta
Sidewall change
+10.5 mm
revs/km: 501.8
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/compare/165-55-r16-vs-225-45-r17Common alternatives to 165/55 R16
These sizes are within a few percent overall diameter — usually safe on the same vehicle from a speedometer-error standpoint.
Compare 165/55 R16 with popular upgrades
Plus-size upgrades from 165/55 R16
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.