Every car owner sooner or later faces the issue of additional body protection. This problem becomes especially acute before the onset of the cold season, when the roads are covered with reagents and dirt. Many drivers wonder whether mud flaps are really necessary on a car or if they are just a marketing ploy by accessory manufacturers.
In reality, the situation is ambiguous, since functionality of these elements depends on many factors. This includes the driving style, the climatic conditions of the region, and the design features of the car. Some drivers consider them mandatory, others dismantle them immediately after purchase, complaining about the deterioration of dynamics.
Technical nuances and the physics of machine movement will help you understand the need for installation. We will look at how exactly these details affect the safety of the paintwork and whether the gamble is worth the candle in your particular case.
The main purpose of automobile mud flaps
The primary function of this element is to protect the lower part of the body from abrasive effects. While driving, the wheels lift sand, small stones and dirt from the road surface, which hit the thresholds and doors with force. Mudguards take this blow upon themselves, maintaining the integrity of the factory paint.
In addition, they act as a barrier to chemical reagents. In winter, roads are generously sprinkled with salt, which is the main catalyst for corrosion. Without protection, the aggressive mixture quickly settles on arches and hidden cavities, triggering irreversible metal rusting processes.
⚠️ Attention: Even small chips on the thresholds caused by flying gravel over time turn into pockets of corrosion that are difficult to eliminate without professional painting.
It is also worth mentioning the safety of other road users. Dirt flying from under the wheels can cover the windshield of the car behind you, creating an emergency situation. Availability protective aprons minimizes this risk.
Benefits of installing wheel arch protection
Installing mud flaps provides a number of tangible benefits, especially for those who often drive on the highway or in poor road conditions. First of all, this is to extend the service life of the paintwork on the bottom of the doors.
The second important aspect is the cleanliness of the body. A car with installed aprons gets dirty much slower. This allows you to visit the car wash less often and save money on chemicals and cleaning services.
- 🛡️ Reducing the risk of chips and scratches on the sills and rear bumper.
- 🧼 Less dirt falling on the windows and optics of oncoming cars.
- ❄️ Additional protection against snow and ice sticking to wheel arches in winter.
- 💰 Preserving the presentation of the car, which is important for subsequent resale.
Many modern models already have regular mudguards are standard, which indicates their effectiveness. However, owners of premium brands often note that even factory elements do not always cope with the volume of dirt at speeds above 110 km/h.
When choosing mud flaps, pay attention to their height: models that are too short may be ineffective when installing a car with increased ground clearance.
Disadvantages and impact on aerodynamics
Despite the obvious benefits, mud flaps also have their opponents. The main argument against it is the deterioration of the aerodynamic properties of the car. Any protruding part of the body creates additional air resistance, which theoretically can increase fuel consumption.
However, in reality the impact on consumption minimal and noticeable only during long driving on the highway at high speeds. In the urban cycle, the difference in fuel consumption will not be noticeable to the driver, but the additional weight and windage will not go away.
Another problem is the accumulation of snow and dirt. In winter, wet snow can accumulate between the mudguard and the body, which, when frozen, turns into an ice block. This can lead to deformation of the apron itself or even damage to the fastenings with a sharp jerk.
⚠️ Attention: Regularly check the space behind the mudguards in winter. Ice accumulated there can damage the paintwork if it melts or moves.
In addition, cheap plastic models lose elasticity and crack over time. A mudguard that comes off at speed can become a dangerous projectile for those driving behind or damage the wiring of your own car.
Effect on fuel consumption
Research shows that installing four mud flaps increases the drag coefficient (Cx) only slightly. The real increase in consumption is less than 0.1-0.2 liters per 100 km at a speed of 120 km/h. For city driving this parameter is negligible.
Comparison of materials: plastic, rubber or polyurethane
The choice of material plays a key role in the durability of the accessory. There are three main types on the market, each of which has its own operating and installation features.
Plastic models are most often full-time or close to them. They are tough, hold their shape well, but become brittle in the cold. Rubber options are more elastic, but over time they can become deformed and look untidy.
| Material | Service life | Elasticity | Impact resistance |
|---|---|---|---|
| Plastic (ABS) | 3-5 years | Low | Average |
| Rubber | 2-4 years | High | High |
| Polyurethane | 5-7 years | Average | Very high |
| Thermoplastic | 4-6 years | High | High |
The most modern are products from polyurethane and thermoplastic. They combine the rigidity of plastic and the flexibility of rubber. Such mudguards do not crack even in severe frosts and are able to withstand impacts from stones without destruction.
Polyurethane mud flaps are the optimal choice for Russian conditions: they do not harden in the cold and last twice as long as regular rubber.
Instructions for installation and selection of fasteners
The installation process depends on the car model and the type of mud flaps selected. In some cases, it is enough to simply insert them into the standard holes; in others, drilling or the use of special clips will be required.
It is important to choose the right fasteners. Using self-tapping screws that are too long can damage the wiring or arch, and short ones simply will not hold the part. Before starting work, it is recommended to study the manual or watch video instructions for your car model.
☑️ Preparation for installing mudguards
If there are no standard holes or they do not match the new mudguard, you will have to drill. In this case, the places where the metal is cut must be treated with an anti-corrosion agent to prevent the development of corrosion under the screw head.
For reliable fixation, a combined method is often used: mechanical fasteners plus a special sealant. This allows you to avoid squeaks and moisture getting into the gap between the body and the mudguard.
Are mudguards needed in winter: expert opinion
Winter is a real test for a car body. A mixture of snow, water and reagents creates an extremely aggressive environment. Experts agree that in winter the presence of protection critical.
During the cold season, splash guards help prevent doors from freezing to the threshold. Dirt flying from under the wheels settles on the seals and freezes, blocking the door from opening. Aprons divert the main flow of dirt downwards, keeping doorways clean.
However, it is worth considering that during periods of heavy snowfall, “pockets” of snow may form behind the mudguards. Therefore, regular washing and cleaning of the arches remains a mandatory procedure to keep the body in perfect condition.
⚠️ Attention: Do not use sharp objects or ice picks to clean mudguards and arches - there is a high risk of damaging the protective coating and the body itself.
Thus, in winter, the benefits of mud flaps outweigh the possible disadvantages associated with aerodynamics. They are becoming an important element of anti-corrosion protection, especially in megacities.
The myth about interior protection
There is an opinion that mud flaps save the interior from dirt. This is only partly true. They protect the sills, but most of the dirt enters the interior through shoes. To protect the interior, high-quality floor mats with high sides are more important.
Frequently asked questions (FAQ)
Do mud flaps affect the cross-country ability of an SUV?
Yes, they can influence. Mud flaps that are too long or too hard can reduce cross-country ability by clinging to obstacles off-road. For SUVs, it is better to choose short, elastic models made of rubber or polyurethane that bend easily.
Do I need to remove mudguards for the summer?
This is not strictly necessary unless you have ideal aerodynamics for racing. In summer, the roads are cleaner and the risk of corrosion is lower, but protection from sand and small stones is still important. They should only be removed if they are damaged.
Can black mudguards be painted to match the body color?
Technically this is possible, but requires special preparation of the plastic (primer on plastic). However, on the lower part of the body the paint will quickly deteriorate due to abrasive effects, so most often they are left black.
Is it true that mud flaps increase noise in the cabin?
When installed correctly and tightly fitted to the arch, the mud flaps should not create additional noise. On the contrary, they can slightly reduce aerodynamic noise from the wheel arches. A whistle or hum only occurs when the installation is poor.