Owners Skoda Octavia A5 They often try to change the appearance of their car, making it more aggressive and sporty. One of the most effective and popular modifications is the installation of arch expanders. This element not only visually increases the track of the machine, but also allows you to install wheels of larger diameter without friction against the body at full load.
Many motorists mistakenly believe that this is only a cosmetic revision, but the correct selection and installation play a critical role in maintaining the integrity of the paint coating. Incorrect geometry can damage the paint during movement over irregularities, which will eventually turn into expensive repairs.
Why do we need expanders and what types exist?
Main function arch extensions - increase in the width of the body at the places of installation of wheels. This gives you the option to install wider wheels and tires, which improves the stability of the car on the track and when cornering. For the model Octavia A5 This is especially true, as regular arches often limit the choice of rubber for sports equipment.
There are several types of linings on the market, differing in material and method of fastening. The most common option is polyurethane expanders, which have high elasticity and resistance to shocks. They do not crack in the cold and are able to withstand the constant vibrations characteristic of our roads.
There are also plastic products, but they are less durable and can break if hit hard. Metal linings, although they look brutal, are susceptible to corrosion and require careful corrosion-resistant treatment before installation. The choice of material directly affects the service life of the modification and the appearance of the car after several years of operation.
- ๐ Polyurethane: Ideal for aggressive driving and bad roads, flexible and durable.
- ๐ก๏ธ ABS plasticCheaper, but requires careful handling and is afraid of low temperatures.
- ๐ฉ Metal: the most durable option, but heavy and prone to rust without coating.
โ ๏ธ Attention: Do not buy expanders that do not match the geometry of the body specifically for facelift or pre-facelift. Octavia A5. An error in the shape will lead to the formation of cracks, where dirt and water will clog, causing rotting of the wing from the inside.
Manufacturer selection and geometry compliance
When selecting the extensions for Skoda Octavia A5 It is important to pay attention to the manufacturer. Counterfeit products often have inaccurate geometry, making installation almost impossible without major refinement. Quality overlays from proven brands are adjusted according to the template, providing a tight fit to the body without gaps.
Some owners prefer products that can be painted in body color, while others leave them in black to create contrast. If you are planning to paint, make sure that the material of the lining is well coupled to the car enamel. Polyurethane requires a special primer, otherwise the paint can peel off at the first wash.
It is also important to consider the width of the expander. Too narrow pads will not give the desired effect of visual expansion, and excessively wide can interfere with the suspension or look unnatural. The ideal option is when the edge of the wheel slightly protrudes behind the body line, creating the effect of a โsport landingโ.
- Narrow (up to 2 cm)
- Medium (3-4 cm)
- Wide (over 5 cm)
- I haven't decided yet
Preparation work before installation
Before starting the installation, it is necessary to carefully prepare the car. Surface cleaning is the most important step on which the reliability of the attachment depends. Use special degreasers to remove bitumen stains, wax and remnants of old mastic in the area of the expansioner installation.
If you plan to drill holes for mounting, make sure you know exactly where the wing amplifiers are going and where they arenโt. The error can lead to a violation of the rigidity of the structure or damage to the inner cavity of the wing. Metal thickness check In the place of drilling will help to avoid penetration through.
It is also necessary to prepare the tool: a set of screwdrivers, screwdriver, marker for marking, drill with a set of drills and a high-quality sealant. Having quality materials will save you time and nerves, as reworking the work often costs more than buying the right tools right away.
โ๏ธ Preparation for the installation of expanders
Technology of installation of arch expanders
The installation process begins with fitting. Apply the markings on the wing with paint tape to see how the pad will look in reality. Do not rush to apply glue or drill holes at once - it is better to check the symmetry on the other side of the car several times.
There are two main ways of fastening: on bilateral tape and using screws. For Skoda Octavia A5 Often a combination method is recommended that provides maximum reliability. First, a layer of polyurethane sealant is applied, then tape is glued, and only after that screws are fixed.
When drilling holes, be sure to use metal drill with a depth limiter. After drilling the edge of the hole must be treated with an anti-corrosion composition to prevent rusting. The sealant is applied both on the lining itself and on the hats of screws to exclude moisture from entering inside.
What to do if the coating is not glued?
If the surface was not defatted or there was a layer of wax on it, the glue will not catch. In this case, you need to remove the lining, re-clean the place with alcohol or degreasing and apply a fresh layer of sealant glue.
Nuances of work with suspension and wheels
Installation of expanders is often accompanied by the replacement of wheels with wider ones. It is important to check whether the tire will touch the suspension elements with full compression of shock absorbers. To do this, you can simulate the maximum load by putting passengers in the back seat and driving over irregularities.
If you use spacers or change the collapse-convergence, consider that this can affect the geometry of the arch. Extensors must compensate for this displacement. Sometimes a small modification of the wing itself is required so that the wheel rotates freely without friction against the edge of the metal.
Pay attention to the distance between the tire and the expander. It should be sufficient to allow the passage of dirt and water. If the gap is too small, the spray will constantly hit the patch, gradually destroying the material and clogging the space between the lining and the wing with dirt.
Properly selected expanders not only improve the appearance, but also protect the wings from chipped and dirt, acting as an additional buffer when hit by stones.
Post-installation care and operation
After installing the expanders, they must be properly taken care of. When washing a car, try not to direct a jet of water under high pressure directly into the joint between the lining and the body. This can wash the sealant and lead to the element being peeled off.
Regularly inspect the condition of the fastener and sealant, especially after the winter period. Temperature changes and reagents can weaken fixation. If you notice that the lining has begun to move away, glue it immediately to avoid water getting under the plastic.
To preserve the appearance of polyurethane expanders, use special polishes that make the material black and shiny. This not only improves the aesthetics, but also creates a protective layer that repels dirt and prevents fading in the sun.
| Expander type | Material | Service life | Difficulty of installation |
|---|---|---|---|
| Polyurethane | Soft polyurethane | 5-7 years | Average |
| Plastic | ABS plastic | 3-4 years | Low |
| Metal | Steel/Aluminum | 10+ years | High |
| Composite | Fiberglass | 5-6 years | High |
โ ๏ธ Attention: Never install expanders on dirty or wet surfaces, as this is guaranteed to detach the adhesive and corrosion the metal under the lining.
Conclusion and final recommendations
Installing arch extensions on Skoda Octavia A5 It is a great way to personalize the car and give it a sportier feel. However, the success of this modification depends on the quality of materials and accuracy of the work. Do not skimp on buying components and sealants.
Remember that the right installation takes time and attention to detail. If you are not confident in your abilities, it is better to entrust the work to professionals who have experience with similar body elements. This will save you money on possible repairs.
In the end, well-installed arch expanders will not just be a decorative element, but a functional part of your car, which will last for many years, protecting the body and improving the appearance.
Do I need to paint the expanders in body color?
It depends on your taste. Black flares create contrast and look sporty, while body-colored ones make the car look more solid and expensive. Polyurethane is highly paintable if you use the right primer.
Can extenders be installed without drilling holes?
Yes, you can only use high-quality double-sided tape and polyurethane sealant. However for Skoda Octavia A5 during active use, the combined method (adhesive tape + self-tapping screws) is considered more reliable.
Does installing extensions affect the vehicle's cross-country ability?
No, fender flares do not increase ground clearance. They only allow the installation of wider wheels, which can improve traction, but the geometric cross-country ability remains the same.
How long does the sealant take to dry before traveling?
It is recommended to wait at least 24 hours after installation before actively operating the vehicle. This will ensure complete polymerization of the sealant and reliable adhesion to the body.
Before purchasing flares, measure the width of your wheels and see if they will fit in the arch without the flares to get an idea of how wide the wheel trim you actually need to buy.
โ ๏ธ Attention: Avoid installing spreaders with sharp edges as they can damage pedestrians' clothing on contact and create a risk of injury in the event of an accident.