Double Cab Bed Cap Dimensions: A Comprehensive Guide

Double Cab Bed Cap Dimensions: A Comprehensive Guide cars.truckstrend.com

The double cab pickup truck has become a ubiquitous vehicle, balancing passenger comfort with practical utility. For many owners, maximizing that utility means adding a bed cap – also known as a truck cap, camper shell, or topper. This enclosed shell transforms the open bed into a secure, weather-protected cargo area, vastly expanding the truck’s capabilities. However, the success of this transformation hinges entirely on one critical factor: Double Cab Bed Cap Dimensions.

Understanding and accurately measuring these dimensions is not merely a technicality; it’s the difference between a perfectly integrated, functional addition and an ill-fitting, problematic eyesore. An incorrectly sized bed cap can lead to a host of issues, from compromised security and water leaks to poor aesthetics and even damage to the truck itself. This comprehensive guide will delve into every aspect of Double Cab Bed Cap Dimensions, ensuring you have all the knowledge needed to make an informed decision.

Double Cab Bed Cap Dimensions: A Comprehensive Guide

Understanding the Double Cab Truck Bed

Before diving into cap dimensions, it’s crucial to understand the characteristics of a double cab truck bed. Double cab trucks are defined by their four full-sized doors, offering ample passenger space in the rear. This increased cabin space typically comes at the expense of bed length. While single and extended cabs might offer 8-foot or 6.5-foot beds, double cabs are most commonly paired with shorter bed lengths, often ranging from 5.5 feet (e.g., Ford F-150, Ram 1500, Chevy Silverado) to 6 feet (e.g., Toyota Tundra, some Tacoma configurations). Some specific models might have slightly different lengths, but the general principle remains: passenger capacity dictates a more compact bed.

This shorter bed length is the primary differentiator when it comes to bed cap selection. A cap designed for an 8-foot bed simply won’t fit a 5.5-foot double cab bed, and vice-versa.

The Crucial Role of Accurate Bed Cap Dimensions

The dimensions of your double cab bed cap are paramount for several reasons:

1. Perfect Fit and Aesthetics: A cap that perfectly matches the contours and dimensions of your truck bed looks factory-installed, enhancing the vehicle’s overall appearance. An ill-fitting cap, with gaps or overhangs, detracts significantly.
2. Security: A properly sealed cap prevents unauthorized access to your cargo. Gaps leave vulnerabilities.



3. Weather Protection: The primary function of a bed cap is to shield contents from rain, snow, dust, and UV rays. Correct dimensions ensure a tight seal, preventing leaks that can damage sensitive equipment or goods.
4. Functionality: An accurately sized cap ensures the tailgate can open and close freely, and that any side windows or doors operate without obstruction.
5. Aerodynamics: While subtle, a well-fitted, cab-height cap can contribute to better aerodynamics and potentially minor fuel economy improvements compared to an open bed.
6. Safety: A cap that shifts or isn’t properly secured due to incorrect dimensions can be a safety hazard, especially at highway speeds.

Key Dimensions to Measure for Your Double Cab Bed Cap

Accurate measurement is the cornerstone of selecting the right bed cap. Do NOT rely solely on online specifications or general model year data, as slight variations can occur even within the same truck model. Always measure your specific truck.

Here are the critical dimensions you’ll need:

1. Bed Length (Top Rail Measurement):

   • How to Measure: Use a steel tape measure. Start at the bulkhead (the front wall of your truck bed, closest to the cab) and measure along the top edge of the bed rail all the way to the very end of the tailgate when it’s closed. This is crucial as caps are designed to sit flush with the closed tailgate.
   • Common Double Cab Lengths: Expect measurements around 64-67 inches (approx. 5.5 feet) or 73-76 inches (approx. 6 feet).

2. Bed Width (Top Rail Measurement):

   • How to Measure: Truck beds are rarely perfectly rectangular; they often taper slightly from front to back. Measure the width of the bed rails at three points:
     • At the front (near the cab).
     • In the middle of the bed.
     • At the rear (near the tailgate).
   • What to Look For: Most bed caps are designed to accommodate minor tapering. However, noting these measurements helps ensure a snug fit. Use the widest measurement or an average if the taper is significant. Typical widths can range from 60-70 inches, depending on the truck model.

3. Bed Rail Height/Thickness:

   • How to Measure: Measure the thickness of your truck’s bed rails where the cap will sit. This is important for the clamping system of the cap.
   • Consideration: Some aftermarket bed rail protectors or spray-in bed liners can slightly alter this dimension. Ensure the cap’s clamps will have sufficient purchase.

4. Cab Height (for Cab-High Caps):

   • How to Measure: If you desire a cab-high cap (one that matches the height of your truck’s cab roofline for a streamlined look), measure from the top of your truck’s bed rail straight up to the highest point of your cab roof.
   • Importance: This ensures the cap flows seamlessly with your truck’s design.

5. Overall Cap Height (for Mid-Rise/Over-Cab Caps):

   • Consideration: If you need more cargo volume, you might opt for a mid-rise or over-cab cap. These are taller than the cab. While you don’t "measure" for these in the same way, knowing your cab height helps visualize how much taller the cap will be.

Tips for Accurate Measurement:

• Use a helper: Having someone hold the end of the tape measure can ensure accuracy.
• Measure multiple times: Double-check your figures.
• Be precise: Even a half-inch can make a difference in fit.
• Note your truck’s exact year, make, and model: This information is crucial for cap manufacturers.

Common Double Cab Bed Length Examples

While exact dimensions vary, here are common bed lengths you’ll encounter for popular double cab trucks:

• Ford F-150/F-250/F-350 Double Cab: Most commonly 5.5-foot beds (approx. 67 inches), with some configurations offering 6.5-foot beds.
• Ram 1500/2500/3500 Double Cab: Typically 5.7-foot beds (approx. 69 inches) or 6.4-foot beds.
• Chevrolet Silverado/GMC Sierra 1500/2500/3500 Double Cab: Often 5.8-foot beds (approx. 70 inches) or 6.5-foot beds.
• Toyota Tundra Double Cab: Frequently found with 5.5-foot (approx. 66.7 inches) or 6.5-foot beds.
• Toyota Tacoma Double Cab: Common with 5-foot beds (approx. 60.5 inches) or 6-foot beds (approx. 73.7 inches).
• Nissan Frontier Double Cab: Usually comes with a 5-foot bed (approx. 59.5 inches) or 6-foot bed.

Note: These are general figures. Always measure your specific vehicle.

Types of Double Cab Bed Caps Based on Design and Dimensions

Bed caps aren’t one-size-fits-all in terms of design:

1. Cab-High Caps: These are designed to sit flush with the top of your truck’s cab, offering a sleek, integrated look and minimal aerodynamic impact. Ideal for general cargo protection.
2. Mid-Rise Caps: Slightly taller than the truck’s cab, typically adding 2-6 inches of additional internal height. This provides more cargo volume, making them popular for camping gear or taller items.
3. Over-Cab / High-Rise Caps: Significantly taller than the cab, maximizing cargo space. Often favored by contractors or those needing to transport large, bulky items. They offer the most utility but can impact aesthetics and aerodynamics more.
4. Commercial / Work Caps: Designed for heavy-duty use, often made of aluminum with reinforced frames, side access doors, and internal shelving options. Dimensions prioritize durability and function over aesthetics.
5. Sport / Lifestyle Caps: Often feature unique styling, large windows, and sometimes roof racks integrated into the design. Dimensions are still truck-specific, but the emphasis is on adventurous or recreational use.

Challenges and Solutions

Even with careful measuring, some challenges can arise:

• Bed Liner Interference: Drop-in bed liners can sometimes extend over the bed rails, interfering with the cap’s seating or clamping mechanism.
  • Solution: Most installers can trim the liner, or you might need to remove sections where the cap clamps. Spray-in liners typically pose no issue.
• Model Year Variations: Truck manufacturers sometimes make minor bed dimension changes between model years without a full redesign.
  • Solution: Always specify the exact year, make, and model when purchasing a cap. If buying used, bring your truck to test fit.
• Aftermarket Bed Accessories: Things like bed rail covers, stake pocket covers, or certain tie-down points might interfere.
  • Solution: Inspect your bed rails thoroughly before measuring and purchasing. Be prepared to remove or modify accessories.
• Sealing Issues: Even a perfect fit can leak if the weather stripping isn’t applied correctly or if there are imperfections in the bed rails.
  • Solution: Use high-quality weather stripping (often included with the cap). Professional installation is highly recommended for proper sealing.

Benefits of a Properly Sized Double Cab Bed Cap

When you get the dimensions right, the benefits are immense:

• Enhanced Security: Your gear is locked away, out of sight and out of reach.
• Superior Weather Protection: Contents remain dry and clean, regardless of external conditions.
• Increased Storage Volume: The entire bed area becomes usable, protected space.
• Improved Organization: Many caps allow for interior lighting, shelving, and tie-down points.
• Versatility: Transforms your truck into a capable camping vehicle, a secure workhorse, or a family adventure rig.
• Potential Resale Value: A well-maintained truck with a perfectly fitted, high-quality bed cap can command a higher resale price.

Double Cab Bed Cap Estimated Price Table

Prices for bed caps vary significantly based on material (fiberglass, aluminum), features (windows, locks, lighting, headliner, roof racks), and manufacturer. The table below provides general estimated price ranges for new caps, excluding installation costs which can range from $100-$300.

Cap Type/Material	Key Features	Estimated Price Range (USD)	Notes
Basic Aluminum	Lightweight, durable, utilitarian, side doors/windows	$1,000 – $2,000	Often for work trucks, less aesthetic focus.
Fiberglass (Cab-High)	Smooth finish, color-matched, side/rear windows, lock	$2,000 – $3,500	Most popular choice, good aesthetics.
Fiberglass (Mid-Rise)	Same as cab-high but 2-6" taller for more volume	$2,200 – $3,800	Good balance of looks and utility.
Fiberglass (High-Rise)	Max internal volume, often with large rear door	$2,500 – $4,000+	Best for maximum cargo, can look bulky.
Commercial Grade (Aluminum/Fiberglass)	Reinforced, heavy-duty, multiple access points, toolboxes	$3,000 – $5,000+	Built for demanding work, highly customizable.
Premium Features Add-ons	Interior carpet, LED lighting, roof rack system, remote lock, pet screens, ventilation, custom paint	+$200 – +$1,000+ per feature	Adds to base price significantly.

Note: These prices are estimates and can fluctuate based on brand, region, dealer promotions, and specific customization options. Always get a direct quote.

Frequently Asked Questions (FAQ) about Double Cab Bed Cap Dimensions

Q1: Can I use a bed cap from a different truck model or year on my double cab?
A1: It’s highly unlikely to get a perfect fit. Even if the length is similar, the width, bed rail contours, and tailgate opening dimensions will almost certainly differ, leading to gaps, leaks, and a poor aesthetic. It’s strongly advised to buy a cap specifically designed for your truck’s exact make, model, and year.

Q2: How do I know if a used bed cap will fit my double cab truck?
A2: The best way is to physically test fit it. If that’s not possible, meticulously compare your truck’s measurements (length, width at multiple points, cab height) with the exact dimensions of the used cap. Ask the seller for the cap’s original application (e.g., "came off a 2018 Ford F-150 Double Cab, 5.5 ft bed"). Be wary if the seller doesn’t know.

Q3: Do bed caps actually improve fuel economy?
A3: While a properly designed, cab-high bed cap can slightly improve aerodynamics by reducing drag in the open bed, the fuel economy benefits are generally minor (often less than 1 MPG). Heavier caps, or those that are significantly taller than the cab, might even slightly decrease fuel economy.

Q4: What material is best for a double cab bed cap?
A4:

• Fiberglass: Most popular, offers a smooth, paintable finish that can match your truck’s color, good insulation, and generally good aesthetics. Can be heavier and more prone to cracking from impact.
• Aluminum: Lighter, very durable, often more utilitarian in appearance, resistant to dents. Can be noisier and less aesthetically refined than fiberglass.
• ABS Plastic: Lighter and more affordable than fiberglass, but generally less durable and limited in finish options.

The "best" depends on your priorities (aesthetics, durability, weight, budget).

Q5: Is professional installation necessary for a bed cap?
A5: While some handy individuals might attempt DIY installation, professional installation is highly recommended. Installers ensure proper alignment, secure clamping, and, most importantly, a watertight seal using appropriate weather stripping. This prevents leaks and ensures the cap remains secure at all speeds.

Q6: Do I need to remove my drop-in bed liner before installing a cap?
A6: Often, yes, at least partially. Many drop-in liners extend over the top of the bed rails, which can prevent the bed cap from seating properly or interfere with the clamping mechanism. Sections of the liner may need to be trimmed or removed where the cap makes contact or where clamps attach. Spray-in bed liners do not typically pose this issue.

Conclusion

The addition of a bed cap can profoundly transform the utility and versatility of your double cab truck. However, the success of this upgrade hinges entirely on understanding and accurately measuring Double Cab Bed Cap Dimensions. From the precise length and width of your truck’s bed to the desired height of the cap, every measurement plays a critical role in ensuring a perfect fit, optimal functionality, and lasting satisfaction.

Invest the time in meticulous measurement, consider your specific needs, and don’t hesitate to consult with reputable bed cap dealers. By doing so, you’ll ensure your double cab receives a cap that not only looks great but also provides secure, weatherproof storage for years to come, truly maximizing your truck’s potential.