KNOX Universal 4 Bow Bimini Enclosure Only
U40A
Product details
Cruise without compromise with KNOX's superior 4-Bow Bimini Enclosure, an enclosure-only upgrade exceptionally crafted to fit your existing 4-bow Bimini frame. Featuring 900D solution-dyed marine fabric, clear TPU visibility panels, and a roll-up 4-side design, this enclosure delivers complete cockpit protection without replacing the frame you already own. Escape the limits of an open Bimini and embark on adventures across every season. (Frame not included.)
| UV Protection | UPF 50+ |
| Waterproof | PU Coating |
| Color Fastness Rating | 5 |
| Warranty | 1 Year |
Sizing & Fit
Your KNOX Bimini Enclosure is sized to fit standard 3-bow or 4-bow Bimini frames. To find your size, you'll need two measurements from your existing Bimini top: mounting width (A) and canvas width (B). Then match your bow count and length to the chart below.
- Bow Count: count the number of frame bows on your existing Bimini top (3 or 4).
- Length: measure your Bimini top from the front bow to the rear bow along the frame (6 ft for 3-bow, 8 ft for 4-bow).
- A – Mounting Width: measure across your boat from gunwale to gunwale at the Bimini mounting points. This is the distance between your existing Bimini's deck hinges.
- B – Canvas Width: the width of the enclosure canvas itself, measured across the top.
- Designed to fit standard 3-bow and 4-bow Bimini frames with matching length and width
- Frame, support poles, and pole hardware are NOT included
- If your mounting width falls right at the edge of two ranges, size up for easier installation
- Approximate setup time: 10 minutes
Size Chart
| Bow Count | Length | A – Mounting Width (in / cm) | B – Canvas Width (in / cm) |
|---|---|---|---|
| 3 Bow | 6 ft (72" / 183) | 54"–60" / 137–152 | 54" / 137 |
| 3 Bow | 6 ft (72" / 183) | 61"–66" / 155–168 | 61" / 155 |
| 3 Bow | 6 ft (72" / 183) | 67"–72" / 170–183 | 67" / 170 |
| 3 Bow | 6 ft (72" / 183) | 73"–78" / 185–198 | 73" / 185 |
| 3 Bow | 6 ft (72" / 183) | 79"–84" / 201–213 | 79" / 201 |
| 3 Bow | 6 ft (72" / 183) | 85"–90" / 216–229 | 85" / 216 |
| 3 Bow | 6 ft (72" / 183) | 91"–96" / 231–244 | 91" / 231 |
| 4 Bow | 8 ft (96" / 244) | 54"–60" / 137–152 | 54" / 137 |
| 4 Bow | 8 ft (96" / 244) | 61"–66" / 155–168 | 61" / 155 |
| 4 Bow | 8 ft (96" / 244) | 67"–72" / 170–183 | 67" / 170 |
| 4 Bow | 8 ft (96" / 244) | 73"–78" / 185–198 | 73" / 185 |
| 4 Bow | 8 ft (96" / 244) | 79"–84" / 201–213 | 79" / 201 |
| 4 Bow | 8 ft (96" / 244) | 85"–90" / 216–229 | 85" / 216 |
| 4 Bow | 8 ft (96" / 244) | 91"–96" / 231–244 | 91" / 231 |
Why Buy from KNOX.
Decide how much of your boat you want to be covered by the Bimini top. Ensure there is enough space on your boat to install the Bimini top without obstructing other equipment.
Happy Customers
Changing lives, on every adventure
Speedy Delivery
Order by 2 pm EST for same day shipping
30-Days Returns
Risk free outdoor adventure guaranteed
Roll up. Zip down. Your call.
Built to take the weather.
Clear views. Full coverage.
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Frequently Asked Questions.
Didn't find the answer you're looking for?
What's the story behind the KNOX name?
Our brand name is inspired by Fort Knox-known historically as one of the world's most secure vaults. An iconic symbol that proudly proclaims fortress-like protection and unwavering dedication to safeguarding what matters most.
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We currently ship to anywhere in the United States and Canada.
We offer shipping via UPS, FedEx, Domestic or Priority Mail. Our system ensures that your order is shipped through the most appropriate carrier. Tracking numbers are provided with the shipment.
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Yes, knoxcovers.com is a secure site that uses SSL technology. This guarantees the confidentiality of your information and allows you to shop with peace of mind.
I have questions about my order. Who do I contact?
If you have any questions about your order, shipping status, changes, or issues, our support team is here to help.
You can reach us by emailing support@knoxcovers.com and including your order number in the message so we can assist you as quickly as possible.
How do I track my order?
Once your order ships, you’ll receive a shipping confirmation email with your tracking number and a link to track your package in real time.
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