Motorcycle Glossary
Brake disc
In Turkish: Fren diski
In short
The brake disc is the steel rotor fixed to the wheel that the brake pads clamp to slow the motorcycle.
Discs can be fixed (one piece) or floating (an outer ring joined to an inner carrier with rivets); wave-edged designs aim at heat dissipation and looks.
- Every disc is stamped with a minimum thickness (e.g. "MIN TH 4.0"); replace it below that value.
- A warped disc (run-out) causes pulsing at the lever when braking.
- Deep scoring wears pads quickly; fit new pads whenever you replace a disc.
Also known as (including Turkish names)
- Disk
- Fren rotoru
- Brake rotor
Related products
Brake Pads & Discs
Last updated: October 9, 2026
