265/70 R17 vs 33x12.50 R15

33x12.50 R15 is outside the configured tolerance for 265/70 R17: +4.4% diameter and +4.4% speedometer effect.

Geometric comparison

33x12.50 R15 is outside the configured tolerance for 265/70 R17: +4.4% diameter and +4.4% speedometer effect.

Geometric comparison
Metric	This size: 265/70 R17	Alternative: 33x12.50 R15	Difference	Verdict
Overall diameter	31.61 in	33.00 in	+4.4%	Too tall
Section width	10.43 in	12.50 in	+2.07 in	Computed difference
Sidewall height	7.30 in	9.00 in	+1.70 in	Computed difference
Circumference	99.29 in	103.67 in	+4.4%	Too tall
Speedo	0.0%	+4.4%	+4.4%	Outside tolerance

Compare sizes

Current tireLooks valid

New tireLooks valid

Market

Units

Not recommendedOut of tolerance · Diameter +4.4% (+1.39 in) · US (~3%)

Not recommended · This rating covers tire geometry only, not vehicle compatibility.
Diameter +4.4% · Ride-height change +0.70 in.
Speedometer reads low · 60 mph → 62.6 mph.
Sidewall +1.70 in · Width +2.07 in.

Diameter+4.4%+1.39 in

Speedo @ 60+4.4%60 mph → 62.6 mph

Sidewall+1.70 inWidth +2.07 in

Ride-height change+0.70 inDiameter ÷ 2

How this result is calculated

Computed from nominal tire-size geometry: diameter, circumference and speedometer error. It does not check vehicle placard approval, load/speed rating, rim-width range, wheel-arch, suspension or brake clearance.

Methodology

Before fitting

Check the vehicle placard and owner’s manual first.
Match or exceed the required load index and speed rating.
Confirm rim-width range, bolt pattern, hub bore, offset and fasteners.
Inspect wheel-arch, suspension and brake clearance under real vehicle load.
Check TPMS, cold pressure and local roadworthiness rules.

Diameter: 31.61 in 33.00 in+1.39 in
Sidewall: 7.30 in 9.00 in+1.70 in
Width: 10.43 in 12.50 in+2.07 in
Circumference: 99.29 in 103.67 in+4.4%
Revs / mile: 638 611
Speedo @ 60: 60 mph 62.6 mph+4.4%
Ride-height change: 0.00 in +0.70 in
True distance per 100 indicated: 100 mi 104.4 mi+4.4%

Current — 265/70 R17
New — 33x12.50 R15
Grounded to the road: the axle rises +0.70 in.

Result report

265/70 R17 33x12.50 R15 · Not recommended · Out of tolerance

Copy/print uses this page state only; TireFitLab does not create an account or store a server-side report.

Embed or cite this result

HTML iframe

<iframe src="https://tirefitlab.com/embed/tire-comparison/?from=265%2F70+R17&to=33x12.50+R15&market=us" title="265/70 R17 vs 33x12.50 R15 Tire size comparison" loading="lazy" width="720" height="330" style="width:100%;max-width:720px;border:0" referrerpolicy="strict-origin-when-cross-origin"></iframe>

Markdown link

[265/70 R17 vs 33x12.50 R15 Tire size comparison](https://tirefitlab.com/tire-size-calculator/?from=265%2F70+R17&to=33x12.50+R15&market=us)

Open embed preview

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

In-tolerance alternative sizes

In-tolerance alternative sizes
Size	Diameter	Speedo @ 100	Use this
OE `265/70R17`	+0.0%	+0.0%

265/70 R17 · 33x12.50 R15 · Methodology

Technical check: 2026-06-28

What changed

Checked generated routes, metadata, sitemap inclusion and localized page rendering.

Methodology