18x7x12-1-8 tire size

What 18x7x12 1/8 means

18 in overall diameter × 7 in width × 12 1/8 in inside diameter of the steel band, which is pressed onto the wheel.

Actual diameter, new

18.0 in (457 mm) – 18.1 in (460 mm)

Actual width

7.0 in (178 mm)

Replace at diameter

16.2 in (411 mm) – 16.3 in (414 mm)

Measure the diameter; when it reaches the replacement diameter, replace — both tires on the axle together.

Drive wheel, up to 6 mph

5,620 lb (2,549 kg)

Steer wheel, up to 6 mph

4,630 lb (2,100 kg)

Drive wheel, up to 10 mph

5,025 lb (2,279 kg)

Steer wheel, up to 10 mph

4,210 lb (1,910 kg)

Models in the data: Solideal PON 550, Solideal PON 555, Solideal PON 775.

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