Question 1

Which tire is taller, 175/70 R13 or 175/70 R14?

Accepted Answer

175/70 R14 is taller by 25.4 mm (4.42%) compared with 175/70 R13.

Question 2

What is the diameter difference between 175/70 R13 and 175/70 R14?

Accepted Answer

175/70 R13 measures 575 mm overall diameter, 175/70 R14 measures 601 mm — a difference of 25.4 mm (4.42%).

Question 3

How much speedometer error does this change create?

Accepted Answer

Switching from 175/70 R13 to 175/70 R14 changes the speedometer reading by +4.42%. At an indicated 100 km/h, your true speed becomes about 104.4 km/h.

Question 4

Is 175/70 R14 a safe replacement for 175/70 R13?

Accepted Answer

Between 3% and 5% diameter difference — speedometer drift is noticeable. Consider recalibration and confirm clearance with your vehicle's manufacturer specification.

Question 5

What else should I check before changing tire size?

Accepted Answer

Beyond diameter and speedometer error, verify wheel offset (ET), rim width, hub bore, load index, brake and suspension clearance, and your vehicle's manufacturer specification. Local regulations may also limit how far you can deviate from OEM.

Metric	175/70 R13	175/70 R14	Difference
Overall diameter	575.2 mm	600.6 mm	+25.4 mm (+4.42%)
Sidewall height	122.5 mm	122.5 mm	0.0 mm
Circumference	1.807 m	1.887 m	+79.8 mm
Revs / km	553.4	530.0	-23.4
Ground clearance	reference	+12.7 mm	+12.7 mm
Speedometer @ 100 km/h	100.0 km/h	104.4 km/h	+4.42 km/h

175/70 R13 vs 175/70 R14

Detailed comparison

Verdict: warning

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