The brake disc (rotor) is what the caliper grips to stop the bike. It wears and warps over time, and a mismatched disc affects both braking and safety. This guide shows you how to choose the right one.
1. Diameter and thickness
Rotors are made in specific diameters to suit each model caliper, and they have a minimum service thickness. A wrong diameter will not align with the caliper; a worn-thin rotor overheats and warps. Match the original diameter and check thickness.
2. Front vs rear
Front and rear discs differ in size and mounting, and they are not interchangeable. Confirm whether you are replacing the front or the rear rotor.
3. ABS vs non-ABS
ABS models often use a different rotor, sometimes with a tone ring or specific bolt pattern. An ABS rotor is not the same as a non-ABS rotor, so match your bike ABS status.
4. Mounting bolt pattern
The rotor mounts to the wheel hub through a fixed bolt circle. Even a few millimetres of mismatch prevents fitment. Compare the bolt pattern and offset before buying.
5. Signs the disc needs replacing
Deep scoring or grooves, a bluish heat-tinted surface, pulsation through the lever, and braking that feels weak or grabs are signs of a worn or warped rotor. Replace the brake pads at the same time.
6. Fitting tips
Keep the rotor clean of oil and grease, torque the mounting bolts in a cross pattern to spec, and bed in new pads and disc gently for the first few rides.
Bottom line
Match front/rear, diameter, bolt pattern, and ABS type, and pair the new rotor with new pads. Those details decide whether it fits and stops cleanly.
Bike Model Fitment
| Bike Model | Year | Fits |
|---|---|---|
| Honda (CBR 250, CBR 150) | 2000-present | Yes |
| Yamaha (Gladiator, R15 V1/V3, FZ250, MT15) | 2000-present | Yes |
| TVS (Raider, Jupiter) | 2000-present | Yes |
| Bajaj (XCD 125, XCD 135) | 2000-present | Yes |
| KTM (200 ABS) | 2000-present | Yes |
| Hero (Super Splendor, Glamour) | 2000-present | Yes |
Quick Mechanic Diagnostic Checklist
- Confirm front or rear disc
- Measure the rotor diameter
- Match the mounting bolt pattern
- Confirm ABS vs non-ABS type
- Replace brake pads at the same time
- Check rotor thickness against the minimum
- Torque mounting bolts to specification
Frequently Asked Questions
How do I choose the right brake disc for my bike?
Match the front or rear position, the rotor diameter, the mounting bolt pattern, and your bike ABS status. The listing states the exact models covered.
Is an ABS brake disc different from a non-ABS one?
Often yes. ABS models may use a different rotor with a specific bolt pattern or tone ring. Match your bike ABS status before ordering.
When should I replace the brake disc?
When you see deep scoring, heat discolouration, or feel pulsation through the lever, or when the rotor is below minimum thickness. Replace the pads at the same time.
Can I replace only the disc and keep my old pads?
It is better to fit new pads with a new disc so the surfaces bed in evenly. Old pads can be unevenly worn and may not match the new rotor.
Are these brake discs genuine OEM?
They are OEM-spec rotors made to the original diameter, thickness, and bolt pattern. The listing names the exact models covered.