What Size Crossbars for a Subaru Crosstrek?

Choosing the correct size crossbars for your Subaru Crosstrek ensures a secure, aerodynamic, and noise-free roof rack experience. This guide covers everything from factory specifications and aftermarket options to installation tips and weight limits, helping you make the best choice for your adventure needs.

So, you’ve got a Subaru Crosstrek—congratulations! It’s one of the most versatile compact SUVs on the road, perfect for weekend camping trips, mountain biking excursions, or just hauling extra gear without sacrificing fuel efficiency. But if you’re like most Crosstrek owners, you’ve probably looked up at those sleek roof rails and wondered: “What size crossbars do I actually need?”

You’re not alone. The question of crossbar size is one of the most common—and important—decisions when outfitting your Crosstrek for adventure. Getting it right means better aerodynamics, less wind noise, safer cargo transport, and peace of mind knowing your gear won’t fly off on the highway. Get it wrong, and you could end up with rattling bars, damaged roof rails, or even a failed load that puts you and others at risk.

The good news? It’s simpler than it seems—once you know what to look for. In this guide, we’ll walk you through everything you need to understand about crossbar sizing for your Subaru Crosstrek, from factory specs to aftermarket upgrades, load limits, installation tips, and how to choose the best option for your lifestyle. Whether you’re hauling kayaks, bikes, or a rooftop tent, we’ve got you covered.

Key Takeaways

• Factory crossbars are typically 46–48 inches long: These are designed specifically for the Crosstrek’s roof rails and provide optimal fit and performance.
• Aftermarket crossbars vary by brand and model: Yakima, Thule, and Rhino-Rack offer compatible options with different lengths, weights, and features.
• Load capacity matters more than length: Most Crosstrek crossbars support 75–100 lbs dynamic weight; never exceed your vehicle’s roof load limit.
• Proper spacing prevents damage: Crossbars should be spaced 24–30 inches apart to evenly distribute weight and avoid roof deformation.
• Aerodynamic designs reduce wind noise: Look for tapered or teardrop-shaped bars if quiet highway driving is a priority.
• Check compatibility by model year: 2013–2017 and 2018–2023 Crosstreks have slightly different roof rail designs—verify fit before buying.
• DIY installation is easy but double-check torque: Always follow manufacturer instructions and re-tighten after initial use.

Understanding Your Subaru Crosstrek’s Roof Rails

Before you even think about crossbar length, it’s essential to understand the foundation they attach to: your Crosstrek’s roof rails. These aren’t just decorative—they’re engineered structural components that distribute weight across the vehicle’s roof.

Subaru equips every Crosstrek with raised roof rails that run front to back along the sides of the roof. These rails are typically made of durable aluminum or steel and are bolted directly into the vehicle’s frame for strength. They’re designed to accept crossbars that clamp onto them, creating a stable platform for cargo carriers.

There are two key generations to be aware of:
– **2013–2017 Subaru Crosstrek**: Features a slightly narrower rail profile with a more rounded top edge.
– **2018–2023 (and newer) Subaru Crosstrek**: Updated with a flatter, wider rail design that improves compatibility with modern aftermarket crossbars.

Both generations use the same basic clamping mechanism, but the subtle differences in rail shape mean that not all crossbars fit both models perfectly. Always check compatibility by year when shopping.

Another important detail: the distance between the front and rear roof rail attachment points (also called the “track length”) is approximately 43 inches on most Crosstreks. This measurement helps determine how far apart your crossbars should be spaced—a critical factor for load distribution and safety.

Factory vs. Aftermarket Crossbars: What’s the Difference?

When it comes to crossbars, you have two main options: stick with Subaru’s factory-installed or dealer-offered crossbars, or go with an aftermarket brand like Yakima, Thule, or Rhino-Rack. Each has pros and cons.

Factory Subaru Crossbars

Subaru offers genuine OEM crossbars specifically designed for the Crosstrek. These are typically sold as an accessory and installed at the dealership or by the owner.

– **Length**: Around 46 to 48 inches (117–122 cm)
– **Material**: Aluminum with a black powder-coated finish
– **Weight Capacity**: Usually rated for 75–100 lbs dynamic (in motion) load
– **Aerodynamics**: Moderately aerodynamic, but not as refined as premium aftermarket options
– **Noise Level**: Can produce noticeable wind noise at highway speeds, especially without fairings

The biggest advantage of factory crossbars is guaranteed compatibility. They’re engineered to fit your exact model year and rail configuration, so there’s no guesswork. They also maintain your vehicle’s warranty and often come with a Subaru-backed warranty themselves.

However, they tend to be more expensive than aftermarket alternatives and may lack advanced features like integrated locks, tool-free installation, or ultra-quiet designs.

Aftermarket Crossbars

Aftermarket crossbars are made by third-party companies that specialize in roof rack systems. Brands like Yakima, Thule, Rhino-Rack, and Malone are popular among outdoor enthusiasts for their innovation, durability, and performance.

– **Length Options**: Vary widely—common sizes include 44″, 47″, 50″, and 53″
– **Materials**: High-grade aluminum or composite materials
– **Weight Capacity**: Typically 75–165 lbs, depending on the model
– **Aerodynamics**: Many feature teardrop or wing-shaped profiles to cut through wind
– **Noise Reduction**: Advanced designs include internal dampening and noise-reducing fairings

One major benefit of aftermarket crossbars is customization. You can choose a system that matches your specific needs—whether that’s ultra-quiet highway driving, heavy-duty hauling, or sleek aesthetics.

But compatibility is key. Not all aftermarket crossbars fit all Crosstreks. Always verify fit using the manufacturer’s fit guide or vehicle selector tool. For example:
– **Yakima JetStream Crossbars** (47″ or 50″) work well with 2018+ Crosstreks using the Baseline Tower system.
– **Thule WingBar Evo** (47″ or 50″) is a top pick for its quiet performance and easy installation.
– **Rhino-Rack Vortex SX Black** (47″) offers excellent value and durability.

How to Determine the Right Crossbar Length

Now for the million-dollar question: How long should your crossbars be?

The answer isn’t one-size-fits-all. While many people assume “longer is better,” that’s not always true. In fact, excessively long crossbars can overhang the roof rails, creating drag, noise, and potential damage in tight spaces like garages or drive-thrus.

Here’s how to find the ideal length for your Subaru Crosstrek:

Measure the Distance Between Roof Rails

Start by measuring the distance between the inner edges of your front and rear roof rails. On most Crosstreks, this is about 43 inches. Your crossbars should be slightly longer than this to provide adequate clamping surface—but not so long that they extend too far beyond the rails.

A good rule of thumb: choose crossbars that are **3 to 6 inches longer** than the rail-to-rail distance. That means:
– For a 43-inch rail span, aim for **46″ to 49″ crossbars**.

This ensures the bars sit securely on the rails without excessive overhang.

Consider Your Cargo Needs

Think about what you’ll be carrying:
– **Bikes**: Require wider bars (48″+) for stable fork mounts.
– **Kayaks or canoes**: Need full-width support—longer bars (50″+) help distribute weight.
– **Roof boxes or cargo bags**: Can work with shorter bars (46″–48″), but ensure the carrier fits within the bar span.

If you plan to use multiple accessories (e.g., a bike rack and a cargo box), longer crossbars give you more flexibility in positioning.

Check Manufacturer Recommendations

Always consult the crossbar manufacturer’s fit guide. For example:
– Yakima recommends 47″ JetStream bars for most 2018+ Crosstreks.
– Thule suggests 47″ or 50″ WingBar Evo depending on the carrier used.
– Subaru’s own crossbars are 48″ long—a safe default if you’re unsure.

Avoid Overhang Beyond the Roof

While a little overhang is normal, bars that extend more than 2–3 inches beyond the roof rails can:
– Increase wind resistance and noise
– Risk hitting low-hanging branches or garage doors
– Look unbalanced or unprofessional

If you need more width for cargo, consider a wider roof box or extended bike mounts instead of oversized crossbars.

Load Capacity and Safety Considerations

Length matters, but **load capacity** is even more critical. Exceeding your crossbars’ weight limit—or your vehicle’s roof load limit—can lead to catastrophic failure.

Dynamic vs. Static Weight

There are two types of weight ratings to understand:
– **Dynamic weight**: The maximum load while the vehicle is in motion (e.g., driving down the highway). This is the number you’ll see on crossbar specs.
– **Static weight**: The maximum load when the vehicle is stationary (e.g., parked with a rooftop tent).

Most Subaru Crosstreks have a **roof load limit of 150 lbs dynamic** and up to **300–400 lbs static**, but always check your owner’s manual for exact numbers.

Crossbars themselves typically support 75–100 lbs dynamic. That means your cargo—plus the weight of the carrier—must stay under that limit.

For example:
– A 20-lb roof box + 50 lbs of gear = 70 lbs total → Safe
– A 30-lb bike rack + 2 bikes (40 lbs) = 70 lbs → Safe
– A 40-lb kayak + 20-lb carrier = 60 lbs → Safe

But add a second kayak or extra gear, and you could exceed the limit.

Even Weight Distribution

Never load all your weight on one side or at one end of the crossbars. Distribute cargo evenly across both bars and centered over the roof. This prevents twisting forces that can damage the roof rails or cause the bars to shift.

Regular Inspection and Maintenance

– Check clamp tightness every 500 miles or after long trips.
– Inspect for cracks, rust, or loose hardware.
– Clean bars and rails to prevent dirt buildup that can weaken the grip.

Installation Tips for a Secure Fit

Installing crossbars on your Crosstrek is usually a straightforward process—but a few best practices ensure a safe, quiet, and long-lasting setup.

Step-by-Step Installation

1. **Clean the roof rails**: Remove dirt, snow, or debris to ensure a solid grip.
2. **Position the crossbars**: Place them on the rails, aligning with the recommended spacing (usually 24–30 inches apart).
3. **Attach the clamps**: Most systems use a lever or knob mechanism. Tighten by hand first.
4. **Torque to spec**: Use a torque wrench if possible (typically 5–8 ft-lbs). Over-tightening can damage rails; under-tightening causes rattling.
5. **Test the fit**: Shake the bars gently. They should not move or twist.
6. **Re-check after driving**: Vibration can loosen clamps. Re-tighten after the first 50 miles.

Use Anti-Theft Locks

Many aftermarket crossbars come with lock cores to secure the bars to the rails. This is essential if you park in public areas or leave gear on the roof overnight.

Avoid Common Mistakes

– Don’t install bars upside down or backward.
– Don’t mix brands or models unless confirmed compatible.
– Don’t ignore wind noise—it could signal poor fit or imbalance.

Top Crossbar Recommendations for the Subaru Crosstrek

Based on fit, performance, and user reviews, here are some of the best crossbar options for your Crosstrek:

1. Subaru OEM Crossbars (48″)

– Best for: Owners who want factory-matched fit and simplicity
– Pros: Guaranteed compatibility, clean look, easy installation
– Cons: Higher price, moderate noise, limited upgrades

2. Yakima JetStream Crossbars (47″ or 50″)

– Best for: Quiet highway driving and outdoor enthusiasts
– Pros: Excellent aerodynamics, low noise, durable construction
– Cons: Requires Baseline Towers (sold separately)

3. Thule WingBar Evo (47″ or 50″)

– Best for: Premium performance and sleek design
– Pros: Ultra-quiet, tool-free installation, strong load capacity
– Cons: Higher cost

4. Rhino-Rack Vortex SX Black (47″)

– Best for: Budget-conscious buyers who want quality
– Pros: Great value, solid build, good noise reduction
– Cons: Slightly heavier than competitors

5. Malone AirFlow 2 (48″)

– Best for: Occasional users and light-duty hauling
– Pros: Affordable, easy to install, decent performance
– Cons: Less refined than premium brands

Always pair your crossbars with compatible towers or feet that match your Crosstrek’s rail type.

Final Thoughts: Making the Right Choice

Choosing the right size crossbars for your Subaru Crosstrek doesn’t have to be complicated. Start with your vehicle’s specifications, consider your typical cargo, and prioritize safety and fit over flashy features.

Remember: a 46″ to 49″ crossbar is the sweet spot for most Crosstreks, offering the right balance of support, aerodynamics, and aesthetics. Whether you go factory or aftermarket, ensure the bars are properly spaced, securely installed, and never overloaded.

Investing in quality crossbars not only protects your gear and vehicle—it enhances your entire outdoor experience. With the right setup, your Crosstrek becomes more than just a car. It becomes a true adventure machine, ready for whatever the road (or trail) throws your way.

So measure twice, buy once, and get out there. The mountains, lakes, and open skies are waiting.

Frequently Asked Questions

What size crossbars fit a 2020 Subaru Crosstrek?

Most 2020 Subaru Crosstreks work best with 47″ to 48″ crossbars. Factory Subaru bars are 48″, while popular aftermarket options like Yakima JetStream and Thule WingBar Evo offer 47″ or 50″ versions that fit well with the correct mounting hardware.

Can I use longer crossbars on my Crosstrek?

Yes, but avoid excessive overhang. Bars up to 50″ can work if they don’t extend more than 2–3 inches beyond the roof rails. Longer bars may increase wind noise and risk damage in low-clearance areas.

Do I need special tools to install crossbars?

No—most crossbars install with hand-tightened knobs or levers. However, using a torque wrench ensures proper tightness and prevents over-tightening, which can damage roof rails.

Are aftermarket crossbars safe for my Crosstrek?

Yes, as long as they’re compatible with your model year and properly installed. Reputable brands like Yakima, Thule, and Rhino-Rack design their systems to meet or exceed OEM safety standards.

How much weight can Subaru Crosstrek crossbars hold?

Most crossbars support 75–100 lbs of dynamic (in-motion) weight. However, your vehicle’s total roof load limit is typically 150 lbs, so always stay under both the bar and vehicle limits.

Will crossbars damage my Crosstrek’s roof?

When installed correctly, crossbars won’t damage the roof. Ensure clamps are clean, evenly tightened, and not over-torqued. Avoid dragging heavy items directly onto the bars without padding or carriers.