What size are the brake discs on a Ford Fiesta ST?
In short, the Ford Fiesta ST typically uses front brake discs of about 278 mm in diameter and rear brake discs around 253 mm in diameter for most Mk7 models; exact sizes can vary by year and market, so it’s best to verify for your specific car.
When Ford launched the Fiesta ST in 2013 and carried the lineup through updates and limited editions like the ST200, the braking system was configured to balance performance and weight. Variations by region, model year, or trim can affect rotor dimensions, so owners and enthusiasts should confirm the precise measurements before ordering parts or planning upgrades. This article outlines the common setup and how to confirm your car’s exact rotor sizes.
Typical braking configuration for the Fiesta ST
For the widely sold Mk7 Fiesta ST, the standard specification centers on a front rotor around 278 mm in diameter paired with rear rotors around 253 mm. This configuration is consistent with the model’s performance-oriented focus and is commonly cited in official specifications and owner references.
How to verify the exact size on your vehicle
Because production runs and market-specific options can tweak rotor dimensions, the most reliable way to confirm your car’s exact disc size is to check one or more of the following sources: your vehicle’s VIN in the Ford parts catalog, the owner’s manual or service booklet, or the rotor itself (the diameter is often stamped on the edge). If you’re replacing discs or planning an upgrade, use the exact Ford part numbers listed for your VIN to ensure proper fit and function.
Notes for owners and restorers
While 278 mm front and 253 mm rear discs are the common baseline for many Mk7 Fiesta STs, regional variations, facelift updates, or special editions may present different dimensions. When in doubt, consult an authorized Ford dealer or a trusted parts retailer with your VIN to confirm compatibility before purchasing components.
Summary
The typical brake disc sizes for a Ford Fiesta ST are 278 mm at the front and 253 mm at the rear, though exact measurements can vary by year, market, and model variant. Always verify against your vehicle’s VIN or official Ford parts data before sourcing replacement rotors or upgrades.
What is the diameter of the front rotors on a Ford Fiesta ST?
10.94" inch
Detroit Axle - Brake Kit for Ford 2014-2019 Fiesta [ST, 4-Wheel Disc Brakes] Disc Brake Rotors Ceramic Brakes Pads 2015 2016 2017 2018 Replacement : 10.94" inch Front and 9.96" inch Rear Rotors.
What size are the brake discs on a Ford Fiesta?
Diameter 278mm. Height 44mm. Thickness (new) 23mm. Thickness (min) 21mm.
What size rotors are on a 2013 Ford Focus ST?
The change in rotor size was implemented starting 3/31/2014, meaning if your ST was built after that date, your front rotors are 13.2-inches in diameter. Any STs built before 3/31/14 come with 12.6" rotors. The easiest way to check your ST's build date is to go here and enter your car's VIN.
How do I know what size my brake discs are?
HOW TO MEASURE A BRAKE DISC
- ID = Inside Diameter: Measure from inside edge to inside edge.
- OD = Outside Diameter: Measure from outside edge to outside edge.
- Measurement from inside edge of mounting hole to inside edge of bolt hole.
- Bolt hole diameter: measure from inside edge of bolt hole to opposite inside edge.
