The HD4 is the heavy-duty member of the Kimpex Commander family. The WSS4 is the wider, soft-snow-leaning sibling. They share enough hardware that inventory and parts ownership simplifies if you stick inside the Commander line — but they're tuned for different jobs.
Summary
- HD4: Heavy-duty 4-season Commander. Available in 4-hole and 5-hole wheel patterns. Built for work-load durability.
- WSS4: Wider footprint, shorter lug pitch. Built for soft-snow flotation. Weighs 91 lb (front) / 112 lb (rear).
Side-by-side
Attribute
Kimpex Commander HD4
Kimpex Commander WSS4
Positioning
Heavy-duty 4-season
Wide-stance soft-snow
Best use case
Heavy work / commercial
Deep snow / soft ground
Approx. price
$5,000 – $6,500
$4,800 – $6,000
Construction
Heavy-duty
Wide-stance
Wheel patterns
4-hole and 5-hole
Standard Commander
Hardware compatibility
Shares fasteners with WSS4
Shares fasteners with HD4
Deep snow flotation
Good
Excellent
Heavy-load durability
Excellent
Good
Trailer footprint impact
Standard
Wider
Best for
Working ops / year-round
Snow specialists
The Kimpex Commander family shares hardware. The differences are real but the parts pipeline overlaps.
Where the HD4 wins
- Heavy work loads. Plow, sprayer, sustained commercial use. The HD4 is purpose-built for the harder side of the duty cycle.
- Year-round operation. Better suited to mixed conditions year-round than the snow-leaning WSS4.
- 5-hole wheel patterns.If your machine's hub pattern is 5-hole, the HD4 is the in-Commander option.
- Hard-ground durability. Heavier-duty construction outlasts WSS4 on mixed hard surfaces.
Where the WSS4 wins
- Deep snow.Wider footprint and shorter lug pitch deliver measurably more flotation in 18"+ snow.
- Soft ground. Peat, saturated pasture, bog access.
- Slightly lower price point. Marginal.
What they share
Inventory simplification is part of why Kimpex designed these together. HD4 and WSS4 share:
- Fastener compatibility (most install hardware).
- Solid tubular steel frame architecture.
- 15" all-season sprocket.
- Dual-ball-bearing wheels with protective caps.
- Many service parts (idlers, slide guides).
What this means in practice: if you stay in the Commander family across multiple machines or seasons, parts and service ownership is simpler than mixing brands.
Decision framework
- Heavy work / commercial / year-round: HD4.
- Deep-snow specialist: WSS4.
- Mixed conditions, no specialization: WSS4 if soft-snow leaning, HD4 if work-leaning. Or step back to WS4 if neither dominates.
- 5-hole hub pattern UTV: HD4 (verify the availability for your machine).
- Already running WSS4 and looking to upgrade for work: HD4. Shared hardware makes the swap cleaner.
Key Takeaways
- HD4 is the heavy-duty Commander; WSS4 is the soft-snow specialist.
- They share fasteners and many service parts — Kimpex designed them as a family.
- Heavy work → HD4. Deep snow → WSS4. Light recreational → step back to WS4.
- 5-hole wheel pattern? HD4 is the in-Commander answer.
- Approximate spend: HD4 $5,000–$6,500; WSS4 $4,800–$6,000.