Rothbilt 21 RB Specifications
- Length Overall (LOA): ~21'0"
- Beam: ~7'6"
- Dry Weight: ~2,500 lbs
- Engine: Single outboard, 135 HP max
- Fuel Capacity: N/A
- Draft: N/A
- Hull Type: Modified-V fiberglass center console
Cover Features
- Fabric Options: 9oz solution-dyed marine fabric or premium Sunbrella acrylic
- Coverage Type: Center console cover fully encloses hull, cockpit, and outboard motor
- Construction: Reinforced stitching, hem cord at rubrail, adjustable tie-down straps
- Durability: Solution-dyed fabric (5-7 years); Sunbrella acrylic (8-10 years)
- Fit: Custom-fitted to approximately 21'0" Rothbilt 21 RB center console specifications
- Protection: UV-resistant, water-repellent, weatherproof
Additional information
Choose Your Cover Fabric
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
| Weight | 31 lbs |
|---|---|
| Fabric | 9oz Polyester |
Install
Please watch the video below for installation instructions!
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Frequently Asked Questions
The Rothbilt 21 RB center console cover is available in 9oz solution-dyed marine fabric for reliable 5-7 year protection, or premium Sunbrella acrylic for 8-10 years of UV and weather resistance. A lighter 7oz option is also available. All fabrics are solution-dyed through the fiber for lasting colorfastness.
The cover creates a single tent-like shape that peaks at the center console and slopes down to the gunwales in all directions. It fully encloses the cockpit, console, and outboard motor beneath one continuous cover — no part of the boat is left exposed below the rubrail.
Installation takes one person under five minutes. Drape the cover over the center console so it peaks at the top, pull the fabric forward over the bow and aft past the transom and outboard, then secure the adjustable strap-and-buckle tie-downs along the gunwale. No tools required.
Yes. The Rothbilt 21 RB center console cover features reinforced stitching and a hem cord system designed for highway-speed trailering. The adjustable straps hold the cover tight against the hull at speed, preventing billowing or flapping during transport.
Yes. The center console cover fully encloses the entire boat including the outboard motor, helm console, gauges, and all cockpit surfaces. The tent-like shape peaks at the console and drapes down over the transom, completely covering the engine from UV, rain, and salt exposure.
Every Rothbilt 21 RB center console cover includes a 2-year manufacturer warranty covering defects in materials and workmanship. The solution-dyed fabrics are engineered for 5-7 years of service life, and the Sunbrella option extends that to 8-10 years under normal conditions.
The cover is water-resistant with a DWR (durable water repellent) finish that causes rain and spray to bead and roll off the fabric surface. The cover is also breathable, allowing trapped moisture and condensation to escape rather than pooling underneath — which prevents mildew growth.
Yes. This cover is designed to fit all standard production years of the Rothbilt 21 RB center console. Since the hull dimensions and console placement remained consistent across production, the cover fits all model years without modification.
The 9oz solution-dyed marine fabric is available in Navy, Black, and Charcoal. The premium Sunbrella acrylic line offers an expanded selection of colors. All colors are solution-dyed through the fiber for lasting colorfastness that resists fading in harsh marine environments.
Shipping is a flat rate per cover for delivery anywhere in the continental United States. Orders typically ship within 1-2 business days and arrive via standard ground carrier.
Rothbilt 21 RB Center Console Boat Cover — No-Nonsense Inshore Protection
The Rothbilt 21 RB is an approximately 21’0″ center console with an estimated 7’6″ beam, weighing approximately 2,500 pounds dry and rated for up to 135 horsepower. Built by Rothbilt — a smaller boat manufacturer that focused on functional, no-frills center console fishing platforms — the 21 RB was designed for anglers who wanted a straightforward inshore boat without unnecessary complexity. The 135-horsepower rating keeps the rig efficient and manageable, while the 21-foot length provides enough deck space for serious fishing in bays, rivers, and protected coastal waters. This custom-fitted center console cover creates a single tent-like shape that peaks at the center console and slopes down to the gunwales in all directions, fully enclosing the cockpit, console, and outboard motor. Anglers who also run hardtop-equipped boats can explore our full line of T-Top boat covers for those rigs.
Tailored to the 21 RB’s Simple Fishing Layout
The Rothbilt 21 RB features a center console helm station, open cockpit with rod holders, and a single transom-mounted outboard — a clean, functional layout built for getting on the water and catching fish. This cover is pattern-cut to peak at the console and drape smoothly over the hull, fully enclosing the outboard motor within the cover’s footprint. The adjustable strap-and-buckle tie-down system along the gunwale and a hem cord at the rubrail ensure a tight, secure fit even in windy conditions. Installation takes one person under five minutes, and the reinforced construction is rated for highway-speed trailering. Anglers running a similar-sized bay fishing platform will find the same full-enclosure fit quality on the Sea Boss 23 Bay center console cover.
Protection That Matches Rothbilt Quality
Fabric options include 9oz solution-dyed marine fabric rated for five to seven years of UV and weather resistance, or premium Sunbrella acrylic that extends coverage life to eight to ten years. Both fabrics are water-repellent, mildew-resistant, and breathable to prevent condensation buildup beneath the cover. Double-stitched seams reinforce every stress point, and the full-enclosure design means the outboard, helm gauges, and all cockpit surfaces stay shielded from sun, rain, and salt. Every cover ships with a 2-year manufacturer warranty — the same dependable construction found on comparable inshore platforms like the Century 2200 center console cover.
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