Hard landings, curb hits, cartwheels, jumps, and rough off-road driving can put a huge amount of stress on an RC vehicle. After enough abuse, you may start seeing bent chassis plates, cracked braces, damaged bulkheads, broken shock towers, or suspension parts that fail repeatedly.
The solution is not necessarily replacing every plastic component with aluminum.
The most effective RC car chassis upgrades strengthen important structural areas while still allowing selected components to absorb impact. A properly upgraded RC car should be stronger without becoming so rigid that crash forces simply move to a more expensive part.
If your RC car parts keep breaking, the best approach is to identify the actual failure point, reinforce it intelligently, and keep the rest of the vehicle balanced.
Quick Answer: What Are the Best RC Chassis Upgrades?
For most bashers, the best RC chassis upgrades include:
- Stronger chassis braces or stiffeners
- Front and rear skid plates
- A stronger chassis plate when recurring bending proves it is necessary
- Reinforced bulkheads and shock tower supports
- Strategic aluminum upgrades while keeping useful plastic flex points
The right combination depends on where your RC vehicle is actually failing. Upgrade the weak point instead of automatically replacing every stock component.
1. Upgrade the Chassis Braces and Stiffeners
If you regularly launch your RC truck from ramps or drive aggressively over rough terrain, an RC car chassis brace can be one of the most useful durability upgrades.
Chassis braces connect major areas of the vehicle and help control how much the chassis flexes during hard acceleration, impacts, jumps, and landings.
Some flex can be useful, but excessive flex can eventually lead to:
- Bent chassis plates
- Damaged drivetrain alignment
- Loose components
- Cracked mounting areas
- Uneven suspension behavior
Manufacturers use chassis braces for this exact purpose. Losi's aluminum front chassis brace for the Tenacity platform is described as increasing durability, stiffening the chassis, and improving handling.
Traxxas explains in the Sledge owner's manual that the truck combines a ribbed aluminum chassis, reinforced shock tower supports, and a long T-brace running through the chassis to create additional rigidity.
Is a chassis brace worth it?
If your vehicle is known for chassis flex or you regularly experience hard landings, a quality RC chassis brace upgrade can be worthwhile.
However, stronger is not always better. Excessive stiffness can transfer impact loads to bulkheads, suspension mounts, or other components. The goal should be controlled flex, not zero flex.
Plateau RC & Hobby's current RC truck selection includes bashers, crawlers, and large-scale trucks with very different chassis designs. That is a good reminder that brace recommendations should be model-specific. Plateau says its team tests, races, and repairs what it sells, so a useful first step is to identify whether the repeated failure is actually the brace, the chassis plate, a mount, or a surrounding component before buying metal parts.
Do you automatically need a 7075 aluminum chassis?
No.
A stronger aluminum RC chassis makes the most sense when you have identified actual chassis bending as a recurring problem.
Before upgrading, check whether bending is being caused by:
- Excessively large jumps
- Poor landing technique
- Oversized tires
- Added vehicle weight
- Missing chassis braces
- Loose mounting hardware
- Previous chassis damage
- Incorrect aftermarket components
Sometimes correcting the setup is more effective than simply installing a heavier-duty plate.
A good real-world comparison is the ARRMA BIG ROCK 223S currently listed by Plateau RC & Hobby. It uses a strong composite chassis with extended side guards, protected electronics, heavy-duty metal gear differentials, and oil-filled suspension. For many drivers, that factory design means the smart move is to drive the truck first and reinforce only the area that actually starts failing rather than replacing the chassis simply because aluminum sounds stronger.
4. Strengthen Bulkheads and Shock Tower Areas
The chassis itself is only one part of the structural system.
Bulkheads, shock towers, suspension mounts, and upper chassis plates connect the suspension and drivetrain to the main frame. During a hard impact, these areas can experience significant force.
A bulkhead upgrade may be useful if you repeatedly crack bulkheads, loosen suspension mounts, or damage differential mounting areas. Similarly, a shock tower upgrade may help drivers who frequently bend or break towers during rollovers and hard landings.
Some RC designs use aluminum upper plates to create stronger mounting points for suspension arms, steering posts, and chassis braces. ARRMA's aluminum top plate, for example, is designed to provide strong mounting positions for the upper suspension arms, steering posts, and front chassis brace.
Check the surrounding parts first
Before installing a stronger bulkhead or shock tower, inspect what will happen during the next crash.
If the upgraded part becomes significantly stronger than everything connected to it, another component may become the new failure point. Durability upgrades work best when the vehicle remains balanced.
This is another place where bringing the exact vehicle or model number to Plateau can save trial and error. The store's showroom includes hundreds of hobby products and a wide range of RC platforms, while its Bonney Lake team also supports repairs, replacement parts, and custom orders. That makes it easier to compare the stock structure with the upgrade you are considering before committing to a part that may simply move the failure somewhere else.
5. Choose Aluminum and Plastic Parts Strategically
One of the biggest mistakes in RC car durability upgrades is assuming aluminum should replace every plastic part.
It should not.
Plastic has an important advantage in RC vehicles: it can flex. That flexibility allows some components to absorb energy during crashes instead of transferring all of that force directly into the chassis.
Parts that may benefit from aluminum
Depending on the vehicle and how it is used, aluminum can make sense for:
- Chassis braces
- Motor mounts
- Certain bulkhead supports
- Shock towers
- Steering racks
- Upper chassis plates
- Chassis plates
Parts where plastic can be useful
Plastic can often remain a smart choice for:
- Suspension arms
- Bumpers
- Some body mounts
- Certain braces
- Other impact-absorbing components
This is especially important when comparing aluminum vs. plastic RC suspension arms.
An aluminum suspension arm may resist bending, but during a severe impact it can transfer more force into the hinge pins, bulkheads, chassis mounts, or differential housing. A flexible plastic arm may break first, but replacing an inexpensive suspension arm can be preferable to damaging the chassis.
For many RC basher upgrades, the better strategy is to reinforce the structural center of the vehicle while keeping selected outer components capable of absorbing impacts.
How to Stop an RC Chassis From Bending
If you are trying to figure out how to stop an RC chassis from bending, follow this sequence before buying upgrades:
- Inspect the chassis for existing bends or cracks.
- Check whether all braces and mounting screws are installed correctly.
- Identify exactly where the chassis bends.
- Inspect bulkheads and brace mounts for damage.
- Check whether oversized tires or heavy accessories are increasing stress.
- Add appropriate chassis reinforcement if available.
- Install skid protection in areas receiving repeated impacts.
- Consider a stronger chassis only if bending continues.
- Improve jump and landing technique.
- Recheck the vehicle after several driving sessions.
This method can save money because you are addressing the actual cause instead of randomly buying upgrade parts.
Should You Upgrade Before Anything Breaks?
Not always.
If your RC vehicle is already performing well and you are not breaking parts, there may be no reason to replace stock components. Driving the vehicle first helps you understand its genuine weak points.
Plateau's current inventory shows why one upgrade recipe does not fit every RC. The BIG ROCK 223S uses a composite chassis designed for bashing, while the Axial SCX10 III 1987 Toyota SR5 uses a steel C-channel chassis specifically designed to reduce flex and improve suspension precision.
Those two vehicles solve different problems in different ways. A high-speed basher needs impact resistance and serviceability, while a crawler benefits from predictable chassis behavior and suspension control. The correct upgrade depends on the platform, terrain, and type of failure you are actually seeing.
How to Make an RC Car More Durable Without Adding Too Much Weight
If your goal is to make an RC car more durable, focus on strengthening the areas that repeatedly fail while keeping the vehicle as light as practical.
Excess weight can create new problems. A heavier vehicle carries more energy during a crash, which can increase stress on:
- Suspension arms
- Shock towers
- Bearings
- Driveshafts
- Differentials
- Tires
- Chassis mounts
This means installing every available metal upgrade can sometimes make the vehicle less forgiving.
For RC car upgrades for bashing, prioritize protection and structural support rather than simply adding metal. A skid plate, the correct chassis brace, or a stronger mount can sometimes solve the problem with less added mass than replacing multiple stock components.
Build a Stronger RC Vehicle With Plateau RC & Hobby
The best RC car chassis upgrades are the ones that fix an actual weakness.
Start with chassis braces if excessive flex is the problem. Add skid plates where the underside takes repeated abuse. Consider a stronger chassis when bending becomes a recurring issue. Reinforce bulkheads or shock towers when those mounting areas repeatedly fail, and use aluminum selectively instead of replacing every plastic component.
Most importantly, think about the RC vehicle as a complete system.
Plateau RC & Hobby in Bonney Lake carries RC trucks, crawlers, and bashers, along with replacement parts, batteries, tires, chargers, upgrades, repairs, and custom-order support. Its team describes itself as hobbyists who test, race, and repair the products they sell, which is especially useful when a durability problem could have more than one cause.
Need Help Choosing the Right Chassis Upgrade?
Browse Plateau's RC truck selection to compare current platforms, then visit the Bonney Lake store at 21107 State Route 410 E with your vehicle or model number. Because online checkout is currently disabled, the website is best used to research products before purchasing in-store.
If you are unsure whether you need a brace, skid plate, stronger chassis, bulkhead support, or simply a replacement stock part, contact Plateau RC & Hobby for fitment and compatibility help before buying. Matching the upgrade to the actual failure point can save money and prevent the next crash from damaging a more expensive component.
Frequently Asked Questions
What is the best upgrade to stop an RC chassis from bending?
A properly designed RC car chassis brace is often the first upgrade to consider when excessive chassis flex is causing bending. If the chassis itself remains a recurring failure point, a stronger chassis plate may also be appropriate.
Are aluminum RC parts stronger than plastic?
Aluminum parts are generally more rigid and can be stronger in certain applications, but plastic can absorb impacts through flex. The best material depends on the part and how the vehicle is used.
Should RC suspension arms be aluminum?
Not necessarily. Plastic suspension arms can act as useful impact-absorbing components. Aluminum arms may transfer crash forces into bulkheads, hinge pins, or chassis mounting areas.
Are skid plates worth installing on an RC car?
Yes, especially if you regularly drive on gravel, rocks, pavement, or rough terrain. An RC chassis skid plate can protect the chassis from scraping, dents, and repeated underside impacts.
Is a 7075 aluminum chassis better?
A 7075 aluminum RC chassis can provide greater strength and stiffness for demanding applications, but it is not necessary for every driver. Upgrade when chassis bending is an actual recurring problem.
Why does my RC car keep breaking parts?
Repeated breakage may be caused by hard impacts, worn components, excessive vehicle weight, incorrect upgrades, oversized tires, loose hardware, or stress being transferred from stronger aftermarket parts into weaker surrounding components.
What should I upgrade first for RC bashing?
Start by identifying what actually fails. Chassis braces, skid protection, bumpers, and strategic structural reinforcement are usually more useful than replacing every stock component with aluminum.
