TIRE PLUS SIZING CALCULATOR

Change wheel diameter while keeping the tire's overall size the same. Preserves speedometer accuracy, gearing, ABS calibration, and fender clearance.

01 — READ FROM THE SIDEWALL

YOUR CURRENT TIRE

NEW RIM DIAMETER

INCHES
SHOW RESULTS AS
Both stock rim and new rim can be 12" through 26".
02 — YOUR STOCK DIMENSIONS
OVERALL DIAMETER
–
–
SIDEWALL HEIGHT
–
–
CIRCUMFERENCE
–
–
REVS PER MILE
–
rotations
03 — MATCHING TIRE SIZES FOR – RIM
Standard sizes that best preserve your stock overall diameter.
NEW TIRE SIZE NEW OD CHANGE LIFT @ SPEEDO 60 SIDEWALL STATUS
IDEAL — under 1% off
GOOD — 1–2%
ACCEPTABLE — 2–3%
AVOID — over 3%
04 — REAL-WORLD IMPACT
05 — VISUAL COMPARISON
STOCK
–
▶
BEST MATCH
–
01 — ENTER BOTH TIRE SIZES

OEM / FACTORY TIRE

The size your speedometer and odometer were calibrated for. Often listed on the door jamb sticker.

CURRENTLY INSTALLED

The tires actually mounted on the vehicle right now.
02 — DIMENSIONAL COMPARISON
MEASUREMENT OEM CURRENT DIFFERENCE
03 — REAL-WORLD IMPACT
04 — VISUAL COMPARISON
OEM
–
▶
CURRENT
–