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380/85R24 tire size

Tractor drive tire, about 49.8 in (1,265 mm) tall.

What 380/85R24 means

380 mm nominal section width, 85 aspect ratio, R radial, for a 24-inch rim.

Dimensions

Overall diameter
49.8 in (1,265 mm)
Static loaded radius
21.9 in (557 mm)
Rolling circumference
147.0 in (3,735 mm)

Continental Agricultural Tires Technical Databook (measured values) and the Firestone Rolling Circumference Index chart.

Equivalent sizes

Same height and width, same 24" rim: 14.9R24.

340 mm (13.6")
340/85R24, 13.6R24
420 mm (16.9")
420/70R24
480 mm (18.4")
480/65R24

Same height, other width — keeps front axle lead/lag about the same; needs the right rim width.

Full conversion →

Sources: Continental Agricultural Tires Technical Databook, Firestone Ag RCI chart, Firestone hydroinflation tables. Checked October 2026. How we source data.

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