OEM MOQ
WhatsApp
Motuon
Motuon

Tire Size Comparison Tool

TIRE

Compare old vs new tire specs → diameter difference / circumference change / speed deviation. Helps select replacement tires.

Old Tire (Current)

Tread Width (mm)205
Aspect Ratio (%)55
Rim (inch)16
Spec
205/55R16
OD 63.2cm

New Tire (Upgrade)

Tread Width (mm)225
Aspect Ratio (%)45
Rim (inch)17
Spec
225/45R17
OD 63.4cm

Comparison Result

✓ Compatible (within ±3%)Outer Diameter Difference +0.4%
Outer Diameter Difference
+0.4%
(0.2 cm)
Ground Clearance Change
+0.1 cm
One Side
Speedometer Deviation
Faster Speed deviation 0.4%
At 100km/h actual is 100 km/h
Tire Outer Diameter Comparison (Side View)
205/55R16
63.2 cm
225/45R17
63.4 cm
New is 0.4% larger

The outer diameter difference is within ±3%, so the replacement is safe. The speedometer and ABS systems will work within acceptable error margins.

How to Read Tire Specs

205/55R16 means: 205 = section width 205mm, 55 = aspect ratio 55% (sidewall height = 205×55% = 112.75mm), R = radial construction, 16 = fits 16-inch rims.

Outer diameter = (sidewall height × 2) + (rim diameter × 25.4). Sidewall height is calculated from section width × aspect ratio.

Tire Upgrade Considerations

Why ±3% Outer Diameter Difference Matters

Beyond this range: speedometer inaccuracies (5-10 km/h error), larger tires may rub wheel arches, smaller tires reduce ground clearance, ABS and VSC may malfunction.

Rim J-Value Matching

Wider tires require compatible rim J-values. For example, a 6.5J rim best fits 195-205mm widths, while 7.5J fits 215-235mm.

Need related parts?

Tires, rims, brake systems and upgrade parts — One-stop shopping

Browse Parts → →
Tire Size Comparison Tool - Tire Upgrade Calculator — Motuon