ASSEMBLE & INSTALL BASE RACK
FOR STANDARD U-CLAMP & DECK RAIL CLAMPS
TONNEAU COVER & BOLT ON INSTALLATION
IF YOU HAVE A TONNEAU COVER OR WOULD LIKE TO BOLT THE RACK TO YOUR TRUCK BED, FOLLOW THESE STEPS. OTHERWISE, SKIP THIS STEP. (VIDEO COMING 6/20/25. CALL US FOR ASSISTANCE)
Bike Mount Assembly
Deck Rail Installation
Head Ache Rack Assembly
3rd Moto Mount Kit Walk Through
INSTALL MOUNTS
All mounts install the same and can be positioned up to your discretion. Follow this video guide for how to set them up.
Note: Certain mounts require lock washers, some do not. The following REQUIRE Lock Washers:
- Ramp Mount
- Tie Down Point
- Light Bar Mount
- Ski/Snowboard
- CHMSL (3rd Brake Light)
LOAD/UNLOAD BIKES
FULL SIZE TRUCKS: 6 BIKES
MIDSIZE TRUCKS: 5 BIKES
FORD MAVERICK: 4 BIKES
LOAD/UNLOAD DIRTBIKES
FULL SIZE: UP TO 4 DIRT BIKES
MID SIZE: UP TO 3 DIRT BIKES
FORD MAVERICK: UP TO 2 DIRT BIKES
INSTALLATION INSTRUCTIONS
Some manuals may say "Boundry" or "Trailbreaker". They use the same process as Big Days Chase Rack.
BIG DAYS FREQUENTLY ASKED QUESTIONS
Fits (All Model Years):
- Chevrolet Silverado 1500, 2500, 3500
- GMC Sierra 1500, 2500, 3500
- RAM 1500, 2500, 3500
- Toyota Tundra, Tacoma*, T100
- Nissan Titan, Frontier*
- Ford F-150, F-250, F-350, F-450
- Jeep Gladiator*
- Chevrolet Colorado*
- Ford Ranger*
- GMC Canyon*
- Toyota Hilux*
- Ford Maverick**
*Dirtbikes will have to be positioned slightly sideways to close the tailgate
**Select Maverick-specific rack at checkout
Does NOT Fit:
- Any Ram with the RamBox
- Honda Ridgeline
- Trucks with Rigid Tonneau covers
- Rivian R1T
- Hyundai Santa Cruz
- Subaru Brat/Baja
- Tesla Cybertruck (is it a truck?)
- El Camino/Ranchero
Toyota and Nissan (and occasionally other brands) sometimes use a system called “Deck Rail”. This is a system that has a channel on the underside of the bed rail that accessories can slide within. You will typically see handles or Tie Down Points in the rail from the factory. If you have this, you will need to order the Deck Rail clamp.
Yes, there are multiple options for using a Tonneau cover.
- T-Track Covers: Yes
- Soft Roll Covers: Yes, with exceptions
- 3 or 4 Fold Hard Covers: No
- Hard Roll Covers: Yes, with exceptions
T-Track-equipped covers are the easiest. They feature integrated tracks that allow for easy attachment of the Big Days rack using optional T-Track mounting hardware.
Soft-shell tonneau covers can work as well if they don't have a T-Track function. The rack will likely need to be bolted directly to the truck, which means drilling a hole in the top of the top of the bed, outboard of the cover. This method requires at least 3 inches of flat bed rail outboard of the cover for the risers to rest on. If the tonneau cover extends all the way to the outside of the bed, it will not be compatible.
Not compatible:
-Hard-body tonneau covers – These sit flush with the bed rails and prevent the rack from mounting.
-Tri-fold tonneau covers – Most tri-fold covers interfere with the rack’s mounting system and bike clearance. We have had some customers drill into them and mount the rack dirtecly to them, but this isn't a tested option.
Note that MTB hauling uses our lower crossbar, which sits in the bed. It will conflict with a tonneau cover and need to be removed when closing the cover. We've added a simple design to make for quick lower bar removal (under 30 seconds)
Check out this article for more details.
The Bolt-On option requires drilling into the bed of your truck. You will need to drill 4 - ⅜” size holes into the top of your truck bed side rails for the rack to work.
A 4mm allen wrench is included with each rack. Aside from that you will need a 13mm wrench (socket is preferred), and if you are doing the drill in option, a drill with a ⅜” bit. For the hitch rack, a 19mm wrench will be needed to secure the hitch lock into place. A second person is also very useful and can provide good comedic entertainment if you pick the right person.
You’ll notice that we don’t have a specific spot for the rear wheel to stay on the lower bar on both the TrailBreaker and TrailHead racks. We’ve done this for a very specific reason. Every bike is a different size and length, so when the rear wheel is restricted to a single position, the rack manufacturers must allow for wiggle room to make the varying bike sizes work. Wiggle room means one thing: WIGGLE. When there is independent movement in the bikes, you get bikes touching each other, leading to damage to your bikes. By not restricting where the rear wheel goes, it allows the bikes on the rack to sit in the best possible position for each bike, making for a more secure ride. That way, when you hit extreme bumps or holes, the bikes will move together, not independently.
The lower cross beam can be easily removed to allow for 100% truck bed usability. What have we found through driver feedback? That bar does way more than people ever thought it would, so maybe you won’t want to take it out as much as you think you will...
Option 1: Ramp Load - Using the optional ramp, lightly throttle the bike up and into the Moto Mount. The bike will be Then, once loaded, scoot the bike off of the ramp, remove the ramp, and scoot the bike back into place.
Option 2: Two Person Load - Once the bike is in the bed of the truck, each person grabs the lowers of each side of the fork, and lifts the bike up into the mount, making sure to not bump the one towards the outside of the truck out of the truck.
Option 3: One Person Load - Get the bike into the bed, then lift the bike onto a middle ground surface, IE the lower bar, a cooler, etc. Then, get underneath the bike, and lift straight up and into the tray.
For more information, go to our moto page for videos on how to load dirt bikes.
T-Tracks aren’t something new; the T-Track system has been used in construction for years. It’s built for durability and strength, two things that are the core of our business, so it was a no brainer to go this route for us. The way it works is fairly straightforward: there is a specifically shaped channel within the different cross bars. These channels have 1, 2, or 3 hole nuts that are built to slide within these channels.
The DIY brackets are designed to hold anything, in any way. From fridges to loads from the hardware store, they can be adapted to carry anything you think. WIth our T-Track system, the L Brackets attach at a point and then are able to be loosened so they can slide to fit the size of the load you need to carry. Once in position, simply tighten them down, then use a tie down strap or a bungee cord to secure your load.

