Sherpa Topper Rack Guide: Mounting Gear to Your Truck Cap

Running a truck cap or camper shell gives you a weatherproof, lockable storage space in your bed. This is great for many but now you are left with a bunch of potentially usable space on top. A topper rack puts that real estate to work, offering the ability to mount and haul gear on top of your shell without giving up your enclosed bed. It also allows you to mount items that would be sloshing around in your truck bed on the topper rack providing the camper shell space for other gear. We have heard the stories of people needing to climb all the way into the truck bed to get some recovery gear. With a topper rack you can keep that crucial gear in a place that is easily accessible. For truck owners who want the best of both worlds, a quality topper rack is one of the most practical upgrades you can make.

The Sherpa Crow's Nest is our top pick for topper rack setups. It brings the same aircraft-grade aluminum construction and stainless hardware that defines Sherpa's PEAK Series roof racks, but is engineered specifically to mount on top of a truck cap or camper shell. Whether you own a mid-size Tacoma or a full-size F-250, the Crow's Nest is sized and adjusted to fit your rig. For a broader look at everything Sherpa builds, start with our Sherpa Equipment Guide.

What Is a Topper Rack?

A topper rack is a rack system that mounts to the top of a truck cap or camper shell, turning the shell's roof into a usable cargo platform. Unlike a bed rack which sits in the open bed, a topper rack works only when your truck is has a shell. The shell itself provides the enclosed storage, while the rack handles everything on top.

Most topper racks mount using the track system that comes standard on most camper shells. Instead of drilling through the cap, you use T-track nuts that slide into existing channels along the shell's sides or roof rails. This keeps the installation clean and reversible. When you take the rack off, your shell looks exactly the same as before.

The Crow's Nest goes a step further. Its adjustable feet let you fine-tune the height and contour at each corner so the rack sits level and flush against virtually any topper profile. That adjustability makes it one of the few truly universal topper racks on the market. If you're weighing the topper rack route against a standalone bed rack, check out our comparison section below. 

Crow's Nest Overview

The Sherpa Crow's Nest is built to the same standard as the rest of Sherpa's lineup and there is a good reason why Sherpa has some of the strongest and most functional products on the market. The side plates are 1/4-inch thick aircraft-grade aluminum and all hardware is stainless steel. Not every rack brand can make those claims. The side plates are finished with a black powder coat. Black anodized crossbars and black oxide stainless hardware give the whole rack a clean, consistent look on top of almost any shell color.

While you should first check the capacity of your specific shell, load capacity is 300 lbs dynamic and 600 lbs static on the Sherpa Crows Nest. That's plenty of capacity for a rooftop tent, a cargo box, solar panels, recovery gear or perhaps a combination of all of the above. Weight comes in between 35 and 50 lbs depending on which bed size configuration you order which in the grand scheme of things is very minimal for a full size rack featuring beefy 1/4 inch side plates.

Installation is drill-free. The Crow's Nest requires 8 track nuts and a track system on your shell. Standard mounting bolts are M6. Sherpa's adjustable feet are the key feature that makes universal fitment work with each corner can be set independently for height and angle, so the rack contours properly to curved or stepped shell roofs without shimming or guesswork.

The Crow's Nest does not include a cab rack section, but if desired that can be purchased separately. It covers the shell only, running from just behind the cab window to the rear of the topper. Every purchase includes two side plates, the full set of crossbars for your shell size, and all mounting brackets. The rack comes backed by Sherpa's limited lifetime warranty even though you will likely not need it. You can browse available configurations at our Sherpa Topper Racks collection.

Crow's Nest Specs at a Glance

• Side Plate Material: 1/4-inch aircraft-grade aluminum
• Hardware: Stainless steel with black oxide coating
• Crossbars: Black anodized T-channel aluminum extrusion
• Finish: Black textured powder coat side plates
• Load Rating: 300 lb dynamic / 600 lb static
• Weight: 35–50 lbs depending on bed size configuration
• Installation: Drill-free, requires 8 track nuts and existing track system
• Mounting Hardware: M6
• Warranty: Limited lifetime

Sizing and Crossbar Guide

Sizing the Crow's Nest correctly is the most important step in the ordering process. Two dimensions matter: the length of the rack (determined by your bed length, which sets the number of crossbars) and the width of the crossbars (determined by your specific truck). Getting both right means the rack drops into place with no modifications.

Crossbar Count and Rack Length by Bed Size

Sherpa offers the Crow's Nest in five bed-length configurations. The rack length in inches reflects the full span of the side plates from front to rear:

• 5-foot bed: 5 crossbars — 52-inch rack length
• 5.5-foot bed: 7 crossbars — 60-inch rack length
• 6-foot bed: 6 crossbars — 64-inch rack length
• 6.5-foot bed: 8 crossbars — 76-inch rack length
• 8-foot bed: 9 crossbars — 94-inch rack length

Match your bed length to the configuration above. If you're unsure of your bed length, measure from the back of the cab to the inside of the tailgate. Standard compact truck beds are 5 or 5.5 feet. Most mid-size trucks fall in the 5 to 6-foot range, and full-size trucks typically run 5.5 to 8 feet depending on cab style.

Recommended Crossbar Widths by Truck

Crossbar width is measured from outside edge to outside edge. You want the crossbars to span the full width of your shell without hanging off the sides or leaving a gap. The crossbars need to be ad least a couple inches wider (per side) than the tracks it will be mounting to. Sherpa recommends the following widths based on your truck:

• Toyota Tacoma (2nd/3rd/4th Gen): 48 inches
• Toyota Tacoma (1st Gen): 43 inches
• Toyota Tundra (1st Gen): 47 inches
• Toyota Tundra (2nd/3rd Gen): 53 inches
• Ford F-Series: 56 inches
• Chevy/GMC: 56 inches
• RAM: 55 inches

These widths are based on standard truck cap dimensions. If you're running an RSI SmartCap, the SmartCap sits slightly narrower than most aftermarket toppers. Sherpa recommends choosing crossbars that are 5 inches shorter than the width listed above for your truck when ordering for an RSI SmartCap. So a Tacoma owner with a SmartCap would order 43-inch crossbars instead of 48-inch. If your shell is an unusual width, measure directly across the top of your shell from one side to the other to confirm your crossbar size before ordering.

Compatible Trucks and Toppers

The Crow's Nest is designed as a universal rack, meaning it isn't limited to specific vehicle-year combinations the way Sherpa roof racks are. As long as your shell has a T-track or similar channel system that accepts 8 track nuts, the Crow's Nest can work on your truck. That opens compatibility to a wide range of trucks and shells across every major brand. If you are not sure if it will work on your setup reach out and we can get you squared away.

Toyota Tacoma

The Tacoma is one of the most common platforms for the Crow's Nest. 2nd, 3rd, and 4th Gen Tacomas (2005–present) pair best with 48-inch crossbars on most aftermarket shells. 1st Gen Tacomas are narrower and use 43-inch crossbars. The Tacoma's 5-foot bed is the most popular configuration and will come with 5 cross bars.

Toyota Tundra

Tundra owners running a 5.5-foot or 6.5-foot bed will find configurations that work well for their trucks. 1st Gen Tundras use 47-inch crossbars while the wider 2nd and 3rd Gen Tundras step up to 53 inches. If you're running a full-length 8-foot bed on a 1st Gen Tundra, the 9-crossbar configuration at 94 inches covers the shell completely.

Ford F-Series

Ford F-150, F-250 and F-350 owners running caps should order 56-inch crossbars. The 5.5-foot and 6.5-foot bed sizes are the most common Ford configurations for Crow's Nest setups, giving you 7 or 8 crossbars respectively. For more on Sherpa's dedicated Ford roof rack options, see our Sherpa Racks guide.

RAM Trucks

RAM 1500, 2500 and 3500 owners use 55-inch crossbars on the Crow's Nest. RAM's 5.7-foot and 6.4-foot bed options fit nicely in the 6-foot or 6.5-foot rack configurations. The Crow's Nest gives RAM owners full rack functionality without sacrificing the enclosed storage their shell provides.

Chevy and GMC

Silverado and Sierra owners order 56-inch crossbars. Standard 5.8-foot and 6.5-foot beds are the most common pairings. The 6.5-foot configuration with 8 crossbars gives Chevy and GMC owners a full platform rack across the entire top of their shell.

Shell and Cap Compatibility

The Crow's Nest works with any truck cap or camper shell that has a compatible T-track channel system. Most aftermarket shells from brands like ARE, Leer, Snugtop, Century and similar include factory-installed T-tracks specifically for rack and accessory mounting. If your shell has these tracks, the Crow's Nest will work. The 8 track nut requirement is a standard installation with most shells having more than enough track length to accommodate them.

RSI SmartCap owners should note the crossbar sizing adjustment described above (5 inches shorter than the truck-specific recommendation). The SmartCap has its own dedicated load bar system as well, which is covered in our Sherpa Load Bars guide. The Crow's Nest is the heavier-duty option for SmartCap owners who want full rack functionality and the higher 300 lb dynamic / 600 lb static load rating. This is ideal for those carrying more gear that might be heavier.

If your shell does not currently have T-track channels, you may be able to add those after the fact, but check with your shell manufacturer about available track kits before ordering the rack. Drilling through the shell is not a great option and something we wouldn't recommend.

Installation

Installing the Crow's Nest doesn't require drilling into your shell or your truck. That is helpful because we would the risk of damage that would cause would seem to not be worth it. The entire rack mounts through the existing track system on your topper. With basic hand tools and a helper, most owners complete the install in a couple of hours.

What You Need

• 8 track nuts compatible with your shell's T-track size (M6 standard or M8 optional)
• Basic hand tools: wrench, socket set, measuring tape
• A second person to help align and hold the side plates during assembly

Installation Steps

1. Slide 8 track nuts into the T-track channels on your shell — typically 4 per side, positioned front to rear
2. Attach the mounting brackets to the track nuts using M6 (or M8) bolts, leaving them loose enough to adjust
3. Set the adjustable feet to your shell's contour — raise or lower each corner independently so the rack will sit level
4. Place the side plates onto the mounting brackets and thread all fasteners loosely
5. Measure front-to-back and side-to-side to confirm the rack is centered and square on your shell
6. Torque all hardware to final specification once position is confirmed
7. Drop the crossbars into the side plates — they slide into the extrusion channels and lock in place

The adjustable feet are the most important part of the setup process. Take the time to dial in each corner before you torque anything. A rack that isn't sitting flat will stress the mounting points and may shift under load. Once all four corners are set and the rack is level, torque the hardware and you're done.

Crossbars can be repositioned along the side plates after installation if you want to spread them differently for a specific load. The T-channel extrusion also accepts drop-in T-nuts at any point, so you can add accessories anywhere along a crossbar without removing anything from the shell. This is the same crossbar system found on Sherpa's PEAK Series roof racks, which means the same accessory ecosystem works here. Learn more about available add-ons in our Sherpa Roof Rack Accessories guide.

What You Can Mount on the Crow's Nest

The Crow's Nest crossbars are 2x1-inch extruded aluminum T-channel extrusions. Each crossbar has continuous slots on multiple faces that accept drop-in T-nuts, which means you can bolt almost anything to almost any position on the rack without the need to drill. That versatility is one of the biggest reasons truck owners choose the Crow's Nest over simpler crossbar-only systems.

Rooftop Tents

The Crow's Nest's 300 lb dynamic load rating and size easily handles most rooftop tents. The T-channel crossbars accept standard RTT mounting hardware, and the 5-crossbar minimum on a 5-foot bed gives you enough points spread out for a stable mount. For larger or heavier tents, the longer configurations with 7 to 9 crossbars provide even more support and mounting options. Use Sherpa-compatible tent mount brackets for the cleanest install as they drop directly into the crossbar T-slots with no modification.

Cargo Boxes

Hard cargo boxes and waterproof cases bolt directly to the T-channel crossbars using standard hardware or Roam Case Mounts which offer a secure mounting solution. The 600 lb static rating gives plenty of headroom for a loaded cargo box without worrying about flex or fatigue over time. Position the box toward the front of the rack for better weight distribution and aerodynamics.

Recovery Gear

Traction board mounts, Hi-Lift jack mounts and QuickFist-style clamps all work on the Crow's Nest crossbars the same way they work on Sherpa roof racks. Run your MaxTrax flat on top and then add a Rotopax fuel container to extend your trip. A full Sherpa accessories collection is available to build out your recovery setup.

Solar Panels

Flexible solar panels are growing more and more popular. They can lay flat between crossbars and bolt directly to the extrusions. Rigid panel frames also mount cleanly using T-nuts and panel brackets. The Crow's Nest's wider crossbar spread compared to most factory roof rack options makes it ideal for maximizing panel surface area on top of your shell.

Bikes, Kayaks and Boards

Standard aftermarket bike mounts, kayak saddles and surfboard/paddleboard cradles all work with the T-channel crossbars using their included hardware or drop-in T-nuts. Because the Crow's Nest crossbars span the full width of your shell, you have the full rack width to work with which means more usable space than most vehicle-specific roof racks that are constrained by the cab's narrower roofline.

Ladders and Long Cargo

Contractors and tradesman running shells on work trucks use the Crow's Nest to carry ladders, lumber and long cargo that would otherwise take up the full bed. The 600 lb static rating and multiple crossbar contact points distribute the load well. Use ratchet straps through or around the crossbars, or mount ladder-specific tie-down brackets to the T-channels for a more secure solution.

Topper Rack vs Bed Rack: Which One Do You Need?

If you own a truck, you've probably considered both a topper rack and a bed rack at some point. They serve different purposes, and the right choice depends entirely on how you use your truck and whether you run a shell.

Choose a Topper Rack If:

• You already run or plan to run a truck cap or camper shell
• You want enclosed, weatherproof storage in the bed at all times
• You want to carry gear on top without committing to an open bed rack
• You want a reversible setup — the rack and shell can both come off without any permanent modification
• Your primary cargo needs are rooftop tents, bikes, kayaks or moderate loads on top of the shell

Choose a Bed Rack If:

• You run an open bed and want a rack spanning the full bed width
• You want maximum load capacity — Sherpa's PAK System carries 1,000 lbs static versus 600 lbs on the Crow's Nest
• You want side-mounted gear like traction boards, Rotopax or tool panels accessible from outside the bed
• You want to mount a rooftop tent over an open bed for a more campsite-ready setup
• You prefer the visual profile of a bed rack without the height of a shell underneath

Running a Shell and a Bed Rack Together

Some truck owners ask if they can run a Sherpa bed rack inside a shell. The bed rack towers are typically too tall to fit under a standard shell, and the combination isn't designed to work together. The Crow's Nest is purpose-built for shell setups. For more detail on how Sherpa's bed rack system works and what it's capable of, read our Sherpa Bed Rack Guide. If you're still deciding between a shell-and-topper-rack setup versus an open bed rack, the Sherpa Racks Explained guide breaks down the full comparison.

Frequently Asked Questions

What size Crow's Nest do I need for my Tacoma?

Most 2nd, 3rd, and 4th Gen Tacomas run a 5-foot bed, which uses the 5-crossbar configuration at 52 inches of rack length. Pair that with 48-inch crossbars for a standard aftermarket shell, or 43-inch crossbars if you're on an RSI SmartCap. 1st Gen Tacomas use 43-inch crossbars across all configurations.

Does the Crow's Nest work with any truck cap?

It works with any shell that has a T-track or compatible track channel system built into the roof or rail. Most major aftermarket cap brands such as ARE, Leer, Snugtop and Century include T-tracks from the factory. If your shell doesn't have tracks, the Crow's Nest won't mount to it without significant modification.

Do I need to drill into my shell to install the Crow's Nest?

No. The Crow's Nest is completely drill-free. Everything mounts through the existing T-track channels using 8 track nuts and the included brackets. When you remove the rack, your shell is completely unmodified.

Can I mount a rooftop tent on the Crow's Nest?

Yes. The Crow's Nest has a 300 lb dynamic load rating, which is sufficient for most rooftop tents. Use multiple crossbar contact points to spread the tent's mounting feet across the rack. Standard RTT hardware is compatible with the T-channel crossbars using drop-in T-nuts.

How does the Crow's Nest handle an RSI SmartCap?

The Crow's Nest is compatible with the RSI SmartCap, but Sherpa recommends ordering crossbars that are 5 inches shorter than the standard recommendation for your truck. A 2nd Gen Tacoma owner would order 43-inch crossbars instead of the usual 48-inch. Sherpa also makes its own SmartCap Load Bar System if you want a lighter-duty option with a lower profile — our Sherpa Load Bars guide covers that system in detail.

What accessories are compatible with the Crow's Nest crossbars?

Because the Crow's Nest uses the same T-channel crossbar extrusion as Sherpa roof racks, most Sherpa accessories designed for roof rack crossbars will work on the Crow's Nest as well. This includes tent mounts, awning mounts, traction board mounts, Rotopax mounts, cargo tie-down brackets and more. The Sherpa Roof Rack Accessories guide walks through the full selection.

Does Sherpa offer a warranty on the Crow's Nest?

Yes. Like every Sherpa product, the Crow's Nest is backed by a limited lifetime warranty, but we don't think you will need it. Sherpa is also known for continuous product improvement and if an issue were to arise, their customer support team stands behind what they make and will get is addressed ASAP.