16.9R28 tire size

What 16.9R28 means

16.9-inch nominal section width, R radial, for a 28-inch rim. The bias-ply version is written 16.9-28. This is the older inch system; the metric equivalent is listed below.

Rolling circumference

168.0 in (4,267 mm)

RCI group

41 (about 56 in tall, rolling circumference ≈ 168 in)

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

Same height and width, same 28" rim: 420/85R28.

480 mm (18.4")

480/70R28

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

Full conversion →

Water, per tire

70.3 gal (266 L) = 586 lb (266 kg)

CaCl₂ 3½ lb/gal, per tire

713 lb (323 kg) total

CaCl₂ 5 lb/gal, per tire

758 lb (344 kg) total

Firestone hydroinflation tables, 15.0" rim. Other rims and tire counts →

• Tractor tire size conversion
• Lead/lag calculator
• Liquid ballast chart
• Axle load with implements