Most Bronco builds start with wheels and tires, then a lift or a coilover setup. That order makes sense visually and it is exactly how you end up with parts breaking, because the components connecting all of it were engineered for a truck on factory rubber at factory height.
RPG Offroad has already done the engineering work on the parts that matter once you change that. Here is the full lineup for the 2021+ Bronco and, more usefully, why each piece exists.
Tie Rods: The Failure Point
You have seen the photos: a new Bronco with its front wheels pointed in two different directions. That is a tie rod failure, and it happens for a handful of reasons, but look closely at those trucks and a pattern shows up. A lot of them are Sasquatch packages.
Sasquatch means bigger wheels and tires from the factory, which means more stress on the tie rods from day one, before an owner has modified anything. Add trail abuse or a hard climb and eventually something gives. When it does, you have two independent pieces and a truck that is not driving home.
RPG's answer starts with material and process. They begin with solid hex bar, which minimizes how much material has to be machined away for wrench flats, because every slot you cut is a place the part gets weaker. The pins are 17-4 stainless rather than the industry-standard 4130N chromoly. Chromoly is strong enough for the load, but its failure characteristic is cracking on impact, which is precisely the load case a trail rig sees. Everything is Teflon-lined, and they come in orange, blue, black, red, and clear.
Two versions, depending on how far you want to go.
Solid hex bar construction
17-4 stainless pins
Teflon-lined, five colors
For anyone thrashing the truck
Noticeably thicker than OEM
OEM boots often tear on removal
Cheap insurance mid-install
Upper Control Arms
We have not seen documented upper control arm failures on the Bronco yet. We have seen them on plenty of previous platforms, always amplified by exactly what Bronco owners are doing: bigger wheels, bigger tires, more lift.
RPG takes the OEM design further with 17-4 stainless pins instead of chromoly, FK 7/8" rod ends, and 1" spherical bearings. Two details make these worth the money beyond strength: they are fully adjustable on the vehicle, so caster and camber changes do not mean pulling parts off, and RPG kept them close to OEM sizing, so they work with both stock and aftermarket coilovers and both stock and aftermarket wheel packages.
17-4 stainless pins
Caster and camber adjustable on the truck
Near OEM sizing, anodized
The Rear Links
RPG builds both the upper and lower rear links, and they do two jobs at once: strengthen the rear end, and correct the suspension geometry that a lift throws out.
Both are 6061 billet aluminum with new spherical bearings and wobble stoppers, made in the USA from USA-sourced material. The lower link is fixed length deliberately, trading adjustability for strength and stability at a position that does not need to move. The upper link has provisions for everything from factory height up to a 4-inch lift, which covers essentially any coilover setup you would put under this truck.
Adjustable from stock height to 4" lift
Spherical bearings with wobble stoppers
Made in the USA
New spherical bearings, wobble stoppers
Includes replacement Grade 8 bolt
Made in the USA
We installed this exact rear setup on our own Bronco alongside Eibach Pro-Truck coilovers. Torque specs, socket sizes, and the fuel tank decision are all in the install guide.
Complete RPG Stage Kits
If you are buying most of the above anyway, the stage kits are the cheaper and better-engineered route. Stage 3 is the full package with Fox Performance Elite Series 2.5 coilovers, arms, links, tie rods, and a panhard bar, and it clears 37s.
Strength where it matters first
More than Stage 1, less than Stage 3
Arms, links, tie rods, panhard bar
Clears 37" tires
2-door version also available
Frequently Asked Questions
Why do Ford Bronco tie rods break?
Multiple reasons, but the pattern skews toward Sasquatch package trucks, which come with larger wheels and tires from the factory and therefore load the tie rods harder from day one. Trail abuse or a hard climb finishes the job.
Do I need upgraded tie rods on a stock Bronco?
If you have a Sasquatch, RPG considers these a must even on an otherwise stock truck. If you are running larger than factory wheels and tires, same answer.
What is the difference between the RPG 1/2 tie rod kit and the full kit?
The 1/2 kit is a step above OEM for owners who want more margin. The full kit covers every steering component, for anyone who intends to actually thrash the truck.
Why does RPG use 17-4 stainless instead of chromoly?
Chromoly is strong enough for the load but tends to crack on impact, which is exactly the load case off-road. 17-4 stainless handles impact better.
Are the RPG upper control arms adjustable?
Yes, and adjustable while installed on the vehicle, so you can set caster and camber without disassembly.
Will RPG control arms work with stock coilovers?
Yes. RPG kept them near OEM sizing so they work with both stock and aftermarket coilovers, and with both OEM and aftermarket wheel and tire packages.
Do I have to drop the gas tank to install the RPG rear lower links?
Not necessarily. RPG notes you will need to cut the OEM bolt at the driver's side front mount unless you drop the tank, and they include a new Grade 8 bolt to replace it. Either path works.
How much lift do the RPG rear upper links support?
Factory height up to a 4-inch lift, which covers effectively any coilover package for this truck.
Keep Reading
Don't Wait for the Tie Rod to Tell You
Solid hex bar, 17-4 stainless, and a full lineup for the 2021+ Bronco. Built by people who already broke the factory parts.
