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Spec

Get computed geometry, population stats, and hints for a wheel/tire spec

Returns computed geometry (frontspace, backspace, weight estimate), database population statistics (offset distribution, percentiles, match estimates), and contextual hints for a given rim and/or tire specification.

Modes (auto-detected from parameters):

  • rim — rim_diameter + rim_width (optionally rim_offset)
  • tire — section_width + aspect_ratio + rim_diameter
  • hf_tire — overall_diameter + section_width + rim_diameter
  • package — rim + tire params combined

Use this endpoint before search or classified calls to understand whether a spec is common or unusual, what tolerances to use, and what to expect from results.

get/v2/spec/metadata/

Query parameters

rim_diameternumber double

Rim diameter in inches (e.g. 18)

rim_widthnumber double

Rim width in inches (e.g. 8.0)

rim_offsetnumber double

Offset ET in mm (e.g. 25). Enables geometry and match estimates.

bolt_patternstring

Bolt pattern (e.g. 5x114.3). Narrows population stats to matching vehicles.

cbnumber double

Centre bore diameter in mm (e.g. 71.6). Passed through to suggested_classified_params.

section_widthnumber double

Tire section width — dual-domain: integer mm for tire/package mode (e.g. 225, range 115-365), inches for hf_tire mode (e.g. 12.5, range 4.5-14, decided by overall_diameter presence).

aspect_ratiointeger

Tire aspect ratio (e.g. 45). For tire/package mode. Mutually exclusive with overall_diameter.

overall_diameternumber double

Overall tire diameter in inches (e.g. 33, range 27-38). Selects hf_tire mode. Mutually exclusive with aspect_ratio.

hintsboolean

Include human-readable hints in response (default false).

Response

modestring required

Detected mode: rim, tire, hf_tire, or package

Changes

No recorded changes to this endpoint across all 1 revision of this API.