TireFitLab

33x12.50 R15 vs 35x12.50 R17

33x12.50 R15 vs 35x12.50 R17

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

Fitment verdict

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

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
✕ Out of toleranceDiameter +6.1% (+2.00 in) · US (~3%)
  • Out of tolerance · Diameter +6.1%.
  • Speedo @ 60: 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
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.

Methodology
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%
Δ⌀ +50.8 mm
  • Current — 33x12.50 R15
  • New — 35x12.50 R17
  • Grounded to the road: the axle rises +1.00 in.

Result report

33x12.50 R15 35x12.50 R17 · Out of tolerance

Use this size when shopping: 35x12.50 R17

Use this size when shopping

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

Safe alternative sizes

SizeDiameterSpeedo @ 100Use this
−1″ 345/70R14+0.0%+0.0%
OE 305/75R15+0.0%+0.0%
+1″ 335/65R16+0.4%+0.4%
+2″ 255/80R17+0.2%+0.2%

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

Last reviewed: 2026-06-28
What changed
  • Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.