Measured Clearance Tire Planner

This planner works by comparing each candidate tire's height rise and width with the space you measured on the vehicle. It labels each size Fits or Check.

1. Measure vertical space above the tire and side space to the nearest part.
2. Enter the size fitted now, for example 265/70R17.
3. Enter the limits, for example 1.25 in (32 mm) vertical and 11.8 in (300 mm) total width.
4. Read the result for each candidate.

The formula tests 2 conditions: Height Rise ≤ Vertical Space and Width ≤ Width Limit.

Worked example: 295/70R17 rises 0.83 in and is 11.61 in wide. Against 1.25 in and 11.8 in limits, it fits. A 315/70R17 rises 1.38 in and is 12.40 in wide, so it fails both tests.

The conversion table checks 8 candidates against example limits of 1.25 in vertical and 11.8 in width. Five candidates fit and 3 need a closer check.

The 305/65R17 passes height but fails width. Width limits often stop a size before height limits do.

The Measured Clearance Tire Planner is a tool that tests candidate tire sizes against the real space measured on your vehicle. It replaces guesswork with your own tape-measure numbers.

Generic fitment guides list sizes that fit most vehicles. Measured space accounts for your wheels, suspension and body.

This planner has 4 uses: upgrade screening, custom builds, fender-liner checks and pre-purchase checks.

• Screen upgrades: Remove sizes that will not fit.
• Plan custom builds: Size tires to a modified chassis.
• Check fender liners: Find sizes that clear the liner.
• Check before buying: Confirm fit before ordering.