ARK Winch Post Cap – Blue Plastic Cover for 50mm x 50mm Trailer Winch Posts (SKU: WPC50)
$14.30
Keep small winch posts safe from dirt and rust with this bright blue plastic cap—built to fit 50mm x 50mm trailer posts snugly.
In stock
ARK Winch Post Cap – Blue Plastic Cover for 50mm x 50mm Trailer Winch Posts (SKU: WPC50)
The ARK WPC50 is the smallest post cap in the ARK winch post protector family—designed to snugly fit 50mm x 50mm steel trailer posts. It keeps moisture, dirt, and debris out of the tube while also covering sharp edges and creating a clean, finished look.
Protection for the Little Guys:
Ideal for lightweight trailers or compact setups, this cap gives your trailer a polished and functional finishing touch. Made from durable blue plastic, it resists cracking under harsh Aussie weather and won’t fade in the sun.
Key Features:
- Designed for 50mm x 50mm trailer winch posts
- Blocks out dirt, water, insects, and corrosion risks
- Eliminates sharp edges – safer for hands and gear
- UV-stabilised blue plastic construction
- Easy push-on fit – no tools required
- Matches other ARK trailer accessories
Small post, big protection—cap it right with ARK WPC50.
ARK Winch Family Series – Product Overview
| Product Name | SKU | Gear Ratio | Material | Rated Load | Hook Type | Size |
|---|---|---|---|---|---|---|
| ARK Boat Winch 275kg Webbing | W273W | 3:1 | Webbing | 275kg | S Hook | 50mm x 4.5m |
| ARK Boat Winch 650kg Webbing | W654W | 4:1 | Webbing | 650kg | Forged Hook | 50mm x 7.5m |
| ARK Boat Winch 900kg Webbing | W905W | 5:1 / 1:1 | Webbing | 900kg | Snap Hook | 50mm x 7.5m |
| ARK Boat Winch 1150kg Webbing | W115125W | 12:1 / 5:1 / 1:1 | Webbing | 1150kg | Snap Hook | 65mm x 7.5m |
| ARK Boat Winch 275kg Cable | W273C | 3:1 | Steel Cable | 275kg | S Hook | 4mm x 6m |
| Post Cap – Large | WPC100 | N/A | Plastic | N/A | N/A | 100mm x 50mm |
| Post Cap – Medium | WPC75 | N/A | Plastic | N/A | N/A | 75mm x 50mm |
| Post Cap – Small | WPC50 | N/A | Plastic | N/A | N/A | 50mm x 50mm |
| Snap-On Handle for XO750 | WH210B | N/A | Replacement Handle | N/A | N/A | Snap-On |
| Dyneema Rope 2300kg | DRF56B | N/A | Dyneema | 2300kg | Snap Hook | 5mm x 6m |
| Blue Winch Strap 1870kg | SS545B | N/A | Webbing | 1870kg | S Hook | 50mm x 4.5m |
| Dyneema Rope 1300kg | DRS46B | N/A | Dyneema | 1300kg | S Hook | 4mm x 6m |
| Dyneema Rope 3500kg | DRF675B | N/A | Dyneema | 3500kg | Snap Hook | 6mm x 7.5m |
| Winch Strap 6m Forged Hook | SF56B | N/A | Webbing | 1870kg | Forged Hook | 50mm x 6m |
| Winch Strap 7.5m x 65mm | SF6575B | N/A | Webbing | 2350kg | Forged Hook | 65mm x 7.5m |
Related
Frequently Asked Questions
Q: What size trailer post does this fit?
A: It’s made to fit 50mm x 50mm steel winch posts.
Q: Will it stay on during bumpy travel?
A: Yes, it fits snugly and won’t fall off during normal towing conditions.
Q: Can it prevent rust?
A: Definitely. By sealing off the post, it helps block out water and prevent internal corrosion.
Q: Is it UV and salt-resistant?
A: Yes, it’s made for Australian conditions—tough against sun, rain, and road grime.
Q: Is this part of a set?
A: It’s the smallest in ARK’s post cap range. See WPC75 and WPC100 for medium and large sizes.

2x ARK Trailer Hub Ford Pattern 5 Stud Wheel Lazy Hub Kit (Holden LM Bearings) Pair
Ark Pair Stainless Steel Bearing Protectors Buddies Dust Caps For Trailer UB
2x ARK Trailer Bearing Protector Buddies Boss Dust Cap Poly Economy 45mm UB 

0415343379