FAQ - Frequently asked questions (K-Sport Germany)
Please use our return form for all types of returns. It allows us to quickly assign your request and speeds up the response to your request.
Please note the information on the form.
Return form: Download HERE
Some of our products require the modification of one or more original vehicle parts. To ensure that the required parts are sent in correctly, please use the following form to send in the parts to be modified.
If you have any questions regarding the modification, please contact our support team directly by telephone. (Mon - Fri 8 - 17 o'clock, +49 (0)34205 426 690)
Submission form for custom-made products and modifications: Download HERE
general installation instructions for K-Sport brake systems: Download HERE
1. difference between perforated and slotted brake discs
Are perforated brakes more expensive than slotted discs?
Perforated and slotted discs make no difference in price.
Do perforated / slotted brakes dissipate heat better?
Whether perforated or slotted - the additional channels have hardly any influence on heat dissipation. The brake disc ventilation and cooling takes place through the cooling air ducts inside the K-Sport brake disc.
Do perforated / slotted discs have more grip?
Due to the more open surface, perforated and slotted brakes increase the friction coefficient of the disc. This allows a faster reaction when the brake is actuated. Especially in wet conditions, the wet film can be broken through more quickly. The evaporating water is also removed more quickly. Thus no water vapour cushion can form between brake lining and brake disc, which would delay the brake force development.
What are the slots / holes for?
The slots or holes in the friction rings serve exclusively to clean the linings. Gases and particles produced during braking are discharged through the recesses or holes. This ensures better contact between the brake lining and disc.
Do perforated / slotted brakes produce more noise?
Due to the fine edges on the holes and slots, sports brake discs have a higher coefficient of friction. Therefore sports brakes are often louder than normal brake discs. Perforated discs also usually run somewhat quieter than slotted brake discs. Due to the slotted channels, which run across the entire width of the disc, any noise is more strongly directed to the outside. However, this is very rarely perceived as disturbing.
What should I bear in mind when choosing perforated brake discs?
Due to the perforated discs, perforated brake discs have a greater tendency to crack. Under high loads, fine cracks may form from the bores. If cracks are visible, the friction rings should be replaced.
2. master brake cylinder
Does the brake booster have to be changed when installing a K-Sport brake?
No, the original brake booster can still be used. Our brake calipers are designed so that the total piston area corresponds approximately to that of the standard caliper. This ensures that the ratio of master cylinder to brake calliper or brake piston surface is maintained.
Can I only install a larger brake at the front?
Yes, it is not a problem to install a larger brake only on the front axle, as 70 - 80 percent of the total braking power is usually handled by the front brake system. The standard rear axle brake system is therefore sufficient. If the rear brake system is changed, the front brake system must normally also be adapted.
3. brake fluid
Which brake fluid must I use in my K-Sport brake system?
Basically, you can drive any brake fluid in the new K-Sport brake system without hesitation. It tolerates DOT3, DOT4, DOT5, etc. BUT: The limiting factor is always the vehicle. Therefore, always use the brake fluid prescribed for your vehicle by the manufacturer.
4. brake cross section
If you want to change your brake system, you don't just have to make sure that the desired brake system fits the vehicle. The rim size also plays an important role. With the help of the following rule one can avoid problems in most cases due to too small rims and/or too large brake discs. ( rule applies to approx. 95% of all rims)
- To be able to drive our 286x26mm sports brake system you usually need at least 15 inch rims.
- To be able to drive our 304x28mm sports brake system you usually need at least 16 inch rims.
- To be able to drive our 330x32mm sports brake system you usually need at least 17 inch rims.
- To be able to drive our 356x32mm sports brake system you usually need at least 18 inch rims.
- To be able to drive our 380x32mm sports brake system you usually need at least 19 inch rims.
- To be able to drive our 400x36mm sports brake system you usually need at least 20 inch rims.
Important note on clearance
Depending on the rim design and model, the spokes are shaped very differently towards the inside (in the direction of the brake calliper). The distance between the brake calliper and the rim should be at least 2mm. If there is less than 2mm clearance, you can use thin track plates. The observance of the minimum distance is TÜV-relevant.
In order to check the freedom of movement with your rims, we can send you a brake cross-section as a PDF file by email. You can print it out, cut it out and hold it in your rim. If you are interested, please contact our customer service by e-mail or telephone.
5. material of the brake disc
What are K-Sport brake discs made of?
Our K-Sport brake discs are designed in two parts. The cast steel friction ring is bolted to a CNC-milled brake disc cup. This is made of high-strength Al 6061 aircraft aluminium and surface-finished with a hardcoat layer for corrosion protection. An advantage of this construction method is the low weight. By using lightweight materials at this point, the unsuspended, rotating masses can be kept as low as possible, which benefits the overall handling of the vehicle.
What are floating mounted brake discs?
In addition to the classic bolted brake discs, there are so-called "floating mounted brake discs". The friction ring of the brake is screwed to the brake pot so that it can move easily. Thanks to the special screw connection, the material of the friction ring can expand better under higher loads and heat. This prevents tension from forming in the heated disc, which can cause an imbalance or an impact after cooling down. Floating brake discs are therefore particularly recommended for heavy-duty applications.
6. multi-car brake systems
Our brake systems differ not only by the suitable bolt circle, but also by the pot depth and the brake caliper holder.
Download installation instructions for coil-over suspension (temporarily not available)
1. suspension in general
Are K-Sport suspensions hardness adjustable?
The damper characteristics can be adjusted to any application with 36 clicks via the combined compression/traction stage adjustment. This makes it possible not only to adjust the height by means of a thread but also to make changes to the chassis setup and to adapt the chassis behaviour to your own driving style.
What are K-Sport suspensions made of?
Many parts of our undercarriages are CNC-milled from high-strength Al6061 aircraft aluminium. The surfaces are race-orange and black anodized. This provides the well-known K-Sport look and additional weathering protection. Other chassis parts, such as springs, are made of high-quality steel and protected from weathering. The processing is carried out at the highest level. Our K-Sport suspensions therefore achieve a weight advantage of approx. 20% compared to standard components.
Can damaged or worn suspension parts be replaced individually?
Since our K-Sport shock absorber carries a thread over its entire length and all parts are bolted together, it is possible to replace each part individually if necessary. Thus, the repair and maintenance of the suspension is cost-effective. The required spare parts can simply be ordered in the online shop.
(Note: In the case of suspensions with a parts certificate, it is essential to pay attention to the identifications given in the certificate. If different parts are used, the certificate loses its validity!)
Can I also install K-Sport suspensions in electronically adjustable dampers (adaptive suspensions) ex works?
Our suspensions can also be installed in vehicles that have electronically adjustable dampers ex works. A separate deactivation kit is required for error-free assembly. These are vehicle-specific and can be obtained from us on request.
How do I adjust the ride height of K-Sport coilovers correctly?
Unlike many other suspensions, the vehicle height is not adjusted via the spring preload. The preload must not exceed 5mm and is not changed during height adjustment. The suspension height is adjusted exclusively via the thread adjustment between the shock absorber and the lower strut sleeve screwed onto it. For safety reasons, at least 8 cm of the shock absorber must be screwed into the strut sleeve. The values for the lowest vehicle height can be found in the certificate (if available).
How do I adjust the spring preload correctly? (Relevant for warranty!)
The spring preload must only be checked during installation and corrected if necessary. The upper adjustment plate must be used for this purpose. When installed, the spring preload must not exceed 5 mm. (I.e. the spring is compressed in the installed condition max. 5 mm together!). If the spring preload is higher, the warranty becomes void due to incorrect installation. Only the height adjustment between shock absorber and strut sleeve may be used to adjust the vehicle height.