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4.5" Red PU Parallel Keel Roller – Flat Roller 115mm x 72mm x 17mm Bore for Fibreglass Boats (SKU: PRRP115X72X17)
1 × $20.00
Subtotal: $20.00
Sale!
Boat Trailer Black Rubber Vee Keel Roller – 8″ Long, 68mm Diameter, 21mm Bore, 85 Duro (SKU: VRBK200X21)
$7.00 $13.31
8″ V-type black rubber keel roller with 21mm bore (loose fit for 19mm shafts). Built tough with 85 Duro hardness for V-hull boats. Ideal for heavy-duty marine trailers.
Out of stock
ITEM SPECIFICS
8″ Vee Keel Roller – High-Density Rubber for V-Hull Boats
The VRBK200X21 is an 8-inch Vee-style black rubber keel roller, built to snugly support and guide V-shaped hulls on your boat trailer. With a 198mm total length and a 68mm diameter, this roller offers secure hull centering and tough shock absorption on ramps or rough roads.
Crafted from marine-grade rubber at 85 Duro hardness, it’s designed for heavy loads and high-impact use. The 21mm bore makes it ideal for 19–20mm spindles (loose fit on 19mm shafts), where it is intended to rotate freely on the shaft.
Perfect for fibreglass and aluminium V-hull boats that need reliable keel contact and guidance in tough conditions.
Product Specifications
(Scroll to view more on mobile)
| Item | Details |
|---|---|
| Model | VRBK200X21 |
| Type | Vee Roller |
| Length | 198mm (8″) |
| Diameter | 68mm |
| Bore Size | 21mm (Loose fit on 19mm) |
| Rubber Hardness | 85 Duro |
| Material | Black Rubber – Non-marking |
| Weight | 0.67kg |
Ideal Applications:
- Fibreglass or aluminium V-hull boats
- Heavy-duty marine trailers
- R
faq
Frequently Asked Questions (FAQ)
- Q: Can I use this on a 19mm shaft?
A: Yes, it’s a loose fit on 19mm, and is designed to rotate directly on the shaft. - Q: What kind of hull is this roller best for?
A: It’s ideal for V-shaped fibreglass or aluminium hulls due to its guiding shape. - Q: Is the rubber hard or soft?
A: It’s made from 85 Duro black rubber – firm and built for heavy use without deformation. - Q: Does this roller include hardware?
A: No, this product is for the roller only. Shafts and brackets must be purchased separately.
Additional information
| Weight | 0.8 kg |
|---|---|
| Dimensions | 20 × 20 × 5 cm |
| Location | A-5-5 |
| Brand | |
| Manufacturer Part Number | |
| Featured Refinements |
Guide-Recommendation
Usage Guide
Installing your VRBK200X21 roller:
- Slide it onto a 19mm or 20mm spindle (loose fit on 19mm).
- Secure with locking pins, end caps or washers as required.
- Make sure it aligns with the V of your boat’s keel for best centering.
- Rinse regularly to reduce salt buildup and wear.
Evaluation & Recommendation
This roller is made for folks who don’t mess around – you’ve got a proper V-hull and you want it to stay where it belongs on the trailer.
✅ Recommended If You:
- Have a V-hull boat needing centered, stable keel support
- Use a 19–21mm shaft configuration
- Operate in tough marine or saltwater environments
- Need high hardness (85 Duro) for strength and durability
❌ Not Ideal If You:
- Have a flat-bottom or shallow V boat (consider keel roller instead)
- Require a soft contact point for ultra-lightweight boats
- Want a roller kit with all hardware included
Don’t roll sideways – stay on track with this tough little Vee warrior.
🛞 Scroll sideways on mobile • Tap to expand product category
🔳 Parallel Keel Rollers
| Product | Length | Width | Bore | Material | Hardness | Use | Advantages | Link |
|---|---|---|---|---|---|---|---|---|
| 12″ Parallel 26mm | 298mm | 75mm | 26mm | Black Rubber | 85 Duro | Large boats | Heavy-duty load support | View |
| 12″ Parallel 18mm | 298mm | 75mm | 18mm | Black Rubber | 85 Duro | Medium trailers | Balanced support | View |
| 8″ Parallel 26mm | 204mm | 75mm | 26mm | Black Rubber | 85 Duro | Mid-size trailers | Non-marking, stable | View |
| 8″ Parallel 20mm | 204mm | 75mm | 20mm | Black Rubber | 85 Duro | General trailer | UV stable, easy install | View |
| 8″ Parallel 17mm | 204mm | 75mm | 17mm | Black Rubber | 85 Duro | Fibreglass boats | Non-marking, UV-proof | View |
🐾 Dog Bone Rollers
| Product | Length | Width | Bore | Material | Hardness | Use | Advantages | Link |
|---|---|---|---|---|---|---|---|---|
| 12″ Dog Bone 26mm | 297mm | 82mm | 26mm | Black Rubber | 85 Duro | Large hulls | Centres boat naturally | View |
| 8″ Dog Bone 16mm | 200mm | 70mm | 16mm | Black Rubber | – | Light trailers | Compact & tapered | View |
🍬 Cotton Reel / Round Type
| Product | Length | Width | Bore | Material | Hardness | Use | Advantages | Link |
|---|---|---|---|---|---|---|---|---|
| 8″ Cotton Reel 20mm | 192mm | 75mm | 20mm | Black Rubber | 85 Duro | General trailer | Firm grip, compact | View |
| 2.5″ Round Cap 17mm | 78mm | – | 17mm | Black Rubber | 85 Duro | End bumpers | Lightweight edge guard | View |
🪒 Vee & Bow Rollers
| Product | Length | Width | Bore | Material | Hardness | Use | Advantages | Link |
|---|---|---|---|---|---|---|---|---|
| 8″ Vee Roller 19.5mm | 198mm | 68mm | 19.5mm | Black Rubber | 85 Duro | Hull centering | Natural alignment | View |
| 4″ Jet Ski Bow 14mm | 100mm | 70/55mm | 14mm | Black Rubber | 85 Duro | Jet Ski | Small bow cradle | View |
🌟 Special Materials (PVC / Short Sizes)
| Product | Length | Width | Bore | Material | Hardness | Use | Advantages | Link |
|---|---|---|---|---|---|---|---|---|
| KNOTT PVC Roller | 298mm | 95/61mm | 17mm | PVC + Aluminium core | – | Non-marking pro | Perfect for white hulls | View |
| Short Rubber 102mm | 102mm | 59.5mm | 16.5mm | Black Rubber | – | Mini trailers | Non-marking & compact | View |
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