19/06/2026
YOUR GP200 CALIPERS ARE PROBABLY NOT THE PROBLEM.
Every year, Formula Student teams spend a significant amount of money on premium brake calipers, master cylinders, brake lines, and pedal assemblies.
Yet when the brake test arrives...
❌ The car refuses to lock all four wheels.
❌ Pedal effort becomes excessive.
❌ The vehicle keeps rolling.
❌ Teams start blaming the calipers.
But what if the caliper isn't the problem at all?
What if the real problem is the brake rotor?
Most Indian Formula Student cars powered by KTM 390 engines rarely exceed 60–70 km/h.
At these speeds, the brake system does not generate the extreme temperatures seen in professional motorsport.
Yet many teams install:
❌ Highly ventilated rotors
❌ Stainless steel rotors
❌ Lightweight aluminium-based rotor designs
❌ Rotors chosen only for weight reduction
The result?
The brake system struggles to generate sufficient friction at the tyre contact patch.
WHY DOES THIS HAPPEN?
1️⃣ LOWER FRICTION COEFFICIENT
Grey Cast Iron naturally provides superior friction characteristics compared to most stainless steel rotor materials.
2️⃣ POORER PAD BITE
Many brake pads develop stronger and more consistent friction when operating against Grey Cast Iron.
3️⃣ REDUCED PEDAL EFFECTIVENESS
The driver pushes harder on the pedal but generates less braking torque than expected.
4️⃣ EXCESSIVE FOCUS ON WEIGHT SAVING
Teams often remove rotor mass before they have achieved reliable braking performance.
5️⃣ UNNECESSARY VENTILATION
At Formula Student vehicle speeds, many rotor designs simply do not need aggressive cooling.
The brake system cannot benefit from cooling heat that was never generated in the first place.
WHAT DO MOST SUCCESSFUL TEAMS USE?
✅ Grey Cast Iron Rotor Ring
✅ Proper Rotor Thickness
✅ Correct Master Cylinder Sizing
✅ Correct Brake Bias
✅ Proper Brake Pad Selection
✅ GP200 Calipers
The result:
✔ Strong initial bite
✔ Consistent pedal feel
✔ Higher braking torque
✔ Easier wheel lock-up
✔ Greater confidence during braking