Protection of the side parts of the body is one of the priority areas in tuning and maintenance of a modern car, especially given the aggressive operating conditions on the roads of the post-Soviet space. Universal thresholds for cars They are not just decorative elements designed to improve the aerodynamics or appearance of the machine, but also a serious barrier against mechanical damage from the wheels of stones, sand and road reagents.
Unlike factory counterparts, which are often made of thin plastic and quickly lose their presentation, aftermarket solutions offer enhanced design and more sophisticated geometry. Choosing the right set allows the owner to significantly extend the service life of the lower part of the body, preventing the appearance of chips and subsequent corrosion, which can cause expensive body repairs in the future.
The modern market offers many variations of execution, from classic overlays to complex systems with integrated LED-lighting, requiring a professional approach to installation. It is important to understand that universality in this context does not mean “fits all”, but implies the presence of adjustable mounts or the ability to fit the specific profile of the bottom of various models of cars.
Manufacturing materials and their impact on durability
The first thing to consider when choosing protection is the material from which the product is made. It is the physicochemical properties of raw materials that determine how long the product will retain its original appearance and perform protective functions in conditions of constant temperature changes and mechanical loads.
The most common option is the products from ABS plastic. This material is characterized by high impact resistance and the ability to restore shape after minor deformations. Plastic is not corrosive, easily dyed in any color and generally has less weight compared to metal counterparts, which is important for the overall weight of the car.
⚠️ Caution: Cheap plastic options can be fragile in the cold. When buying, be sure to check the labeling of the material and the availability of certificates confirming resistance to low temperatures.
The alternative to plastic is aluminum and his alloys. Such thresholds have exceptional strength and often have a corrugated surface to prevent slipping. Aluminum does not rust, but when damaged, the protective lacquer layer can oxidize, losing its shine. Metal structures are heavier, which theoretically may have a slight effect on fuel consumption, but their ability to withstand serious stone impacts is incomparable with plastic.
There are also composite materials and fiberglass, which are more often used to create complex aerodynamic shapes in sports tuning. They are light and durable, but require very careful installation, since with a strong point impact they can crack, rather than deform.
- 🛡️ ABS plastic: It is optimal for urban driving, easy to paint, not afraid of reagents.
- 🔩 Aluminum: choice for SUVs and harsh conditions, maximum strength, stylish look.
- 🎨 Fiberglass: It is used for complex shapes of body kits, requires careful attitude.
The choice of material is also dictated by the way the vehicle is operated. If the car is for trips on the highway and the city, high-quality plastic will be enough. For regular trips to the primer or to regions with a lot of gravel on the roads, it is preferable to use metal solutions.
Design features and types of fastenings
Universal thresholds can differ significantly in the method of installation, which directly affects the complexity of the installation and the reliability of fixation. Understanding these differences will help you avoid mistakes when buying and choosing an installation center.
The most common type is doorstepwhich are attached directly to the official place or on top of the factory protection. They can be fixed using double-sided tape (often in combination with screws) or special brackets that go under the car. Mounting on scotch requires a perfectly clean and low-fat surface, otherwise backlashes and creaks may appear over time.
Scotch editing secrets
For reliable fixation on double-sided tape, it is critically important to warm up the surface of the body and the adhesive tape itself with a building hair dryer to a temperature of 60-70 degrees. This activates the glue and provides a monolithic clutch that will withstand high-pressure washers.
A more complicated option. slit-throat. They require partial dismantling of the standard elements or even small incisions in the bumper plastic for perfect docking. Such designs often have internal brackets that are screwed to the power elements of the body or spars, providing maximum rigidity.
It is worth mentioning the thresholds of the light-in. In addition to mechanical protection, they perform the function of lighting the landing zone, which is convenient in the dark. Installation of such products requires wiring, connection to position lights or a separate button, as well as careful sealing of the places of entry of wires.
Advantages of Installing Additional Protection
Installing high-quality threshold linings gives the owner of the car a number of undeniable advantages that go far beyond simple aesthetics. This is an investment in preserving the market value of the car and reducing the cost of its maintenance in the long term.
First of all, it's defense (painting coating). The lower part of the doors and sills is the zone of the greatest abrasive effect. Sand flying out from under the wheels works like sandpaper, quickly erasing the varnish and paint to metal. The threshold takes that blow.
Second, it's improving. aerodynamics. Properly designed linings help direct airflow along the side, reducing drag and, as a result, fuel consumption at high speeds. In addition, they prevent dirt from hitting windows and doors, leaving the body cleaner after a trip on a wet road.
Thirdly, this comfort. Many models of thresholds have an increased foot area, which is especially important for owners of crossovers, SUVs and minibuses with high clearance. This makes it easier to enter and exit the cabin, reducing the load on clothes and shoes.
The main purpose of installing thresholds is not so much beauty as the preservation of the factory metal of the body from rotting caused by chipping and moisture.
Comparative Analysis: Factory vs. Universal Thresholds
Often owners ask themselves: should we change the standard elements to universal? To make an informed decision, it is necessary to objectively compare the characteristics of both options.
Factory thresholds are usually designed with an emphasis on minimizing production costs and reducing weight. They are often made of thin plastic that easily scratches and fades out in the sun over time. Their shape may not be the most convenient for rubbing your feet or landing.
Universal analogues from specialized brands are created taking into account the experience of operation. They are thicker, stronger, often have an anti-slip coating and a more aggressive design. Unlike factory ones, however, they take time to install and fit.
| Characteristics | Factory thresholds | Universal (Aftermarket) |
|---|---|---|
| Materials | Thin plastic, composite | Aluminum, thick ABS, steel |
| Impact protection | Low (mud only) | Tall (holding stones) |
| Design | Standard, blends with the body. | Aggressive, standout |
| Installation | Simple, regular seats. | It takes time, it can be fit. |
| Price. | High (at the dealer) | Medium/Affordable |
Thus, if the car is used in mild conditions and is important only factory appearance, you can leave the standard elements. If protection and individuality are the priority, the substitution is obvious.
Installation instructions and necessary tools
The process of mounting universal thresholds requires accuracy and the presence of a certain set of tools. Poor installation can lead to the fall off of the element on the go or, worse, to damage to the body.
To work, you will need: a drill or screwdriver, a set of drills (including metal drills and possibly crowns), a degreaser, double-sided car scotch (3M), screws (usually come with a kit), a silicone sealant and a construction hair dryer. Also, don’t forget to use paint scotch for marking.
☑️ Preparation for threshold setting
Start by thoroughly washing and drying the installation area. Degrease the surface with a special composition. Attach a threshold, check the gaps with bumpers and arches. If everything fits together, stick double-sided tape on the inside of the pad. Carefully remove the protective film from the tape (it is better to do this gradually, as you glue) and press the threshold to the body.
Then comes the drilling phase. Through the technological holes in the threshold (or pre-marked places) drill the body. It is important to use a drill of the correct diameter so that the screw sits tightly, but not too tight. After drilling, be sure to treat the edges of the hole with anticort or paint over to prevent corrosion.
⚠️ Note: When drilling the body, use a depth limiter on the drill or control the process visually so as not to damage the wiring or cabin elements behind the skin.
Lock the threshold with screws, putting rubber or plastic washers under the hats (if included) to protect against moisture. In conclusion, walk along the joints with a transparent sealant to exclude water from entering between the threshold and the body.
Before the final puff of screws, warm up the established threshold with a hairdryer for 2-3 minutes. This will soften the double-sided scotch and provide maximum adhesion after cooling.
Care and maintenance during the winter
Winter is the most severe test for any body elements, and the rapids are at the epicenter of the impact. Snow porridge, salt and ice crusts can cause a lot of problems if you do not follow simple rules of care.
The main problem is the freezing of the door to the threshold or the inability to open the door due to the ice crust at the junction. Do not attempt to forcely tear off the door or hit the threshold with your foot. This can lead to breakage of plastic fasteners or deformation of the metal.
Use lock and glass defrosting devices to treat joints. Wash the rapids regularly at the self-service wash, flushing salt from under the linings. The accumulation of salt under the threshold is a guaranteed way to the rapid rotting of the hidden cavities of the body.
- ❄️ Regularly lubricate rubber door seals with silicone so that they do not freeze to the threshold.
- 🚿 Use the high pressure washer with caution, not directing the jet at a 90 degree angle close to the joints.
- 🧊 Before washing in the cold, be sure to warm up the car so that the ice at the joints melts.
If you notice that the threshold began to “walk” or creak, do not postpone the repair. The water that gets inside will quickly do its black work. It is better to remove the element, dry, treat with anticory and install it again than then cook the body.
Frequent Questions and Answers (FAQ)
Do I need to remove the thresholds for the inspection?
As a rule, the installation of thresholds is not a design change that requires registration, if they do not protrude beyond the dimensions of the car and do not have sharp edges that are dangerous to pedestrians. However, if the thresholds greatly change the ground clearance or track width, formally it may raise questions. In practice, universal overlays rarely cause a refusal to inspect.
Can universal thresholds be painted in body color?
Yes, most plastic sills (from ABS) are designed to be painted. Before that, they must be primed with a special adhesive soil for plastic. Aluminum sills usually have anodized coating or imitation of carbon, and their painting requires complex preparation and specialized paints.
Will rust appear under the threshold after installation?
Rust will appear only if the installation was violated technology: not defatted surface, not treated drilling holes or used poor-quality sealant. With proper installation, the threshold, on the contrary, protects the standard metal from corrosion.
Do the thresholds affect fuel consumption?
In theory, any extra elements increase the mass and can change the aerodynamics. However, the weight of the set of thresholds (3-5 kg) is negligible for a tangible impact on the flow rate in the urban cycle. Aerodynamic rapids can even reduce the flow rate on the track slightly by improving flow.