Terrain code 1–3
1→1.0 firm, 2→1.1 moderate, 3→1.25 extreme.
Details
Raise the code when mud suction or grade will dominate.
Reference
Winch sizing reference
Terrain codes, worked GVWR examples, and class checks for common US ATV, UTV, and light-truck recoveries.
ATV 1,500 lb firm
1,500 × 1.5 × 1.0 = 2,250 → 4,500 lb class.
Details
Enter gvwr 1500, terrain 1.
UTV 3,000 lb moderate
3,000 × 1.5 × 1.1 = 4,950 → 6,000 lb class.
Details
Enter gvwr 3000, terrain 2.
Tacoma-class 5,600 lb firm
5,600 × 1.5 = 8,400 → 12,000 lb class.
Details
Matches the Warn-style worked example pattern.
HD 9,900 lb firm → NO_MATCH
9,900 × 1.5 = 14,850 exceeds the 12,000 lb ceiling.
Details
Do not force a 12k unit for this load.
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