Trojan Trailer Marine Bearing Oil Seal 65mm Outer 45mm Inner PT10141
1 × $30.80 
Ark Pair Stainless Steel Bearing Protectors Buddies Dust Caps For Trailer UB
1 × $53.00 
2x ARK Trailer Bearing Protector Buddies Boss Dust Cap Poly Economy 45mm UB
1 × $33.00 Subtotal: $116.80
$13.00
Protect your trailer winch post from dirt, water, and sharp edges with this durable blue plastic cap designed to fit 100x50mm posts.
In stock
The ARK WPC100 is a practical finishing touch for your boat trailer’s winch post. This tough plastic cap fits snugly over 100mm x 50mm steel posts, protecting the top from water, dirt, and potential damage while covering any exposed sharp edges.
Don’t leave your post top open to the elements. The WPC100 prevents rust and keeps your trailer setup safer and cleaner—with a vibrant blue colour that makes it easy to spot and adds a touch of style.
Small part, big job—protect your trailer from the top down with ARK’s winch post cap.
| 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 |
A: It’s designed for winch posts that measure 100mm x 50mm.
A: It’s made from tough, weather-resistant plastic.
A: To keep out moisture, prevent internal rust, and cover any sharp metal edges at the top of the post.
A: Yes, it simply presses into place—no tools required.
A: Yes, it’s designed for outdoor use on marine trailers and resists fading and cracking.
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