8″ Ark Boat Trailer Black Rubber Keel Roller – 203mm Wide, UV-Stable, 17mm Bore for Fibreglass Boats (SKU: 1241)
$6.20 $12
Premium 8-inch Ark keel roller with 203mm width and 17mm bore. Built from UV-stable black rubber for fibreglass boats. Non-marking, shock-absorbing, and perfect for harsh marine conditions.
Out of stock
8-Inch Ark Black Rubber Keel Roller – Marine-Grade, UV-Stable
The Ark 1241 is a premium 8-inch black rubber keel roller designed for fibreglass boat trailers. Built from high-quality, UV-stable rubber, it provides 203mm of soft support to help cradle your hull during launch, retrieval, or transport.
With a 17mm bore to suit standard 16mm spindles, it’s an easy replacement part that adds real durability to your trailer setup. Whether you’re restoring an older trailer or upgrading worn-out rollers, this Ark roller delivers strength, flexibility, and long-lasting performance.
The roller is non-marking, making it ideal for lighter-coloured fibreglass boats. It absorbs minor shocks while guiding your boat securely, making launching and loading smooth and scratch-free.
Key Specifications
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| Item | Details |
|---|---|
| Model | 1241 |
| Brand | Ark |
| Roller Width | 203mm (8″) |
| Bore Size | 17mm (fits 16mm spindle) |
| Material | Non-marking Black Rubber |
| UV Resistance | Yes |
| Best For | Fibreglass Boats, Marine Trailers |
Why Choose Ark?
- Australian-designed, proven quality
- Known for durability in salt and sun
- Trusted by pros and DIY trailer builders
Dependable, UV-tough and hull-friendly – this is the roller your trailer deserves.
Frequently Asked Questions (FAQ)
- Q: Does it come with a bracket or spindle?
A: No, this is for the roller only. Brackets and spindles are sold separately. - Q: Will this work with a 16mm spindle?
A: Yes, the 17mm bore is made to fit standard 16mm spindles. - Q: Is it good for aluminium boats?
A: It’s ideal for fibreglass boats. If your aluminium boat has a smooth keel, it may still work. - Q: Will the rubber leave marks on my hull?
A: No, the black rubber is non-marking and safe for lighter gelcoat finishes.
| Weight | 0.5 kg |
|---|---|
| Dimensions | 20 × 7 × 7 cm |
| Location | A-3-8 |
| Manufacturer Part Number | |
| Brand | |
| Featured Refinements |
Usage Guide
Installation is straightforward:
- Slide the roller onto a 16mm spindle (not included).
- Mount between your trailer brackets, using locking pins or nuts.
- Ensure alignment with your boat’s keel for best support.
- Wash off salt and grit after use to extend its life.
Evaluation & Recommendation
This is a quality roller for users who want dependable support without overcomplicating things. Built to last, made to roll smooth.
✅ Recommended If You:
- Use a fibreglass boat trailer
- Need a wide 8″ roller with soft support
- Want long-term durability with UV protection
- Use a 16mm spindle system
❌ Not Ideal If You:
- Have a metal boat with a sharp or flat keel
- Need a full roller kit with bracket and spindle included
- Are looking for a narrow roller for small tinnies
Go with Ark if you want Aussie-designed toughness with peace of mind on every launch.
🛞 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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