33x12.50 R15 vs 35x12.50 R17

What changes when you change tire size?

35x12.50 R17 is outside the configured tolerance for 33x12.50 R15: +6.1% diameter and +6.1% speedometer effect.

Geometric comparison

Geometric comparison
Metric This size: 33x12.50 R15 Alternative: 35x12.50 R17 Difference Verdict
Overall diameter 33.00 in 35.00 in +6.1% Too tall
Section width 12.50 in 12.50 in 0.00 in Computed difference
Sidewall height 9.00 in 9.00 in 0.00 in Computed difference
Circumference 103.67 in 109.96 in +6.1% Too tall
Speedo 0.0% +6.1% +6.1% Outside tolerance

Compare sizes

Looks valid
Looks valid
Units
Editorial preset

These are TireFitLab editorial diameter-screening presets. Regional names choose a preset, not a national legal limit, ETRTO rule or vehicle approval. The AWD preset does not establish an allowable drivetrain mismatch. Use the exact vehicle and tyre manufacturer instructions; nominal geometry alone cannot approve fitment.

Not recommendedOut of tolerance · Diameter +6.1% (+2.00 in) · US preset (±3%)
  • Not recommended · This rating covers tire geometry only, not vehicle compatibility.
  • Diameter +6.1% · Ride-height change +1.00 in.
  • Speedometer reads low · 60 mph → 63.6 mph.
  • Sidewall +0.00 in · Width +0.00 in.
Diameter+6.1%+2.00 in
Speedo @ 60+6.1%60 mph → 63.6 mph
Sidewall+0.00 inWidth +0.00 in
Ride-height change+1.00 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
33.00 in 35.00 in+2.00 in
Sidewall
9.00 in 9.00 in+0.00 in
Width
12.50 in 12.50 in+0.00 in
Circumference
103.67 in 109.96 in+6.1%
Revs / mile
611 576
Speedo @ 60
60 mph 63.6 mph+6.1%
Ride-height change
0.00 in +1.00 in
True distance per 100 indicated
100 mi 106.1 mi+6.1%
Δ⌀ +2.00 inΔ↔ +0.00 in
  • Current — 33x12.50 R15
  • New — 35x12.50 R17
  • Grounded to the road: the axle rises +1.00 in.

Tires and wheels in one comparison

Result report

33x12.50 R15 35x12.50 R17 · Not recommended · Out of tolerance

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

In-tolerance alternative sizes

In-tolerance alternative sizes
SizeDiameterSpeedo @ 100Use this
−1″ 315/75R14-1.2%-1.2%
OE 325/70R15-0.3%-0.3%
+1″ 315/70R16+1.1%+1.1%
+2″ 315/65R17+0.4%+0.4%

33x12.50 R15 · 35x12.50 R17 · Methodology