225/45 R17 vs 235/45 R17

235/45 R17 stays within the configured tolerance for 225/45 R17: +1.4% diameter and +1.4% speedometer effect.

Fitment verdict

235/45 R17 stays within the configured tolerance for 225/45 R17: +1.4% diameter and +1.4% speedometer effect.

Metric	This size: 225/45 R17	Alternative: 235/45 R17	Difference	Verdict
Overall diameter	24.97 in	25.33 in	+1.4%	Within tolerance
Section width	8.86 in	9.25 in	+0.39 in	Computed difference
Sidewall height	3.99 in	4.16 in	+0.18 in	Computed difference
Circumference	78.45 in	79.57 in	+1.4%	Within tolerance
Speedo	0.0%	+1.4%	+1.4%	Within tolerance

Current tireLooks valid

New tireLooks valid

Market

Units

✓ Within toleranceDiameter +1.4% (+0.35 in) · US (~3%)

Diameter+1.4%+0.35 in

Speedo @ 60+1.4%60 mph → 60.9 mph

Sidewall+0.18 inWidth +0.39 in

How this result is calculated

Computed from nominal tire-size geometry: diameter, circumference and speedometer error. It does not check wheel-arch, suspension or brake clearance.

225/45 R17 235/45 R17 · Within tolerance

Use this size when shopping: 235/45 R17

Geometric estimate. Always verify physical clearance (arches, suspension, brakes) before fitting.

Size	Diameter	Speedo @ 100
−1″ `285/40R16`	+0.0%	+0.0%
OE `225/45R17`	+0.0%	+0.0%
+1″ `295/30R18`	-0.0%	-0.0%
+2″ `305/25R19`	+0.1%	+0.1%

What changed

Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.