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Sport Brake Discs
A sport brake disc should be judged by its ability to disperse heat and gases, not by its design. That's why discs are drilled and grooved.
What this changes
When the brake pad heats up, it releases gas: a film of gas and dust forms between it and the disc, and the pedal becomes long and spongy. The grooves scrape away this film and the holes let it escape: bite remains sharp braking after braking. On the road, the difference is most noticeable on a mountain descent or during a track day - precisely where tired brakes are frightening.
Drilled, grooved, or both
The grooved disc is the most forgiving: it cleans the pad without weakening the disc. The drilled disc cools better but requires high-quality cast iron; otherwise, micro-cracks will start from the holes after several severe cycles. Ventilated discs have an internal channel that provides most of the cooling: they are preferable as soon as the car is heavy or fast.
What to plan for
Discs and pads must be changed per axle, never on just one side. Bedding-in is not optional: around ten progressive braking applications without coming to a complete stop, otherwise the pad will not bed in properly and the disc may warp. Also check whether your part number includes the wheel bearing and ABS ring - several rear references include them, avoiding a second order.
The range at a glance
- 166 part numbers in the catalogue.
- From €19 to €159, median €19.
- Available sections: 30 mm.
- Vehicles covered: Toyota, Hyundai, Mercedes Benz, Kia, Opel, Nissan, Audi, BMW.
- 166 part numbers with CE approval (e1 approval number on the product page).
