The Ford Focus ST, a hot hatch renowned for its performance and handling, boasts a striking wheel design that contributes significantly to its aggressive stance. Understanding the specifications of these wheels is crucial for anyone looking to maintain, repair, or upgrade their Focus ST. This guide delves into the factory wheel specs, explores available options, and advises on upgrading for optimal performance and aesthetics.
Factory Focus ST Wheel Specs (Variations by Year and Trim)
The Focus ST's wheel specifications vary slightly depending on the model year and trim level. It's essential to check your vehicle's documentation or the vehicle identification number (VIN) to confirm the precise specifications. However, we can outline the general parameters:
- Diameter: Typically ranges from 18 to 19 inches. Larger diameter wheels often come with higher trim levels or as optional upgrades.
- Width: Generally between 7.5 and 8.0 inches. Wider wheels can accommodate wider tires, improving grip and handling.
- Bolt Pattern (PCD): This is usually 5x108 mm. This refers to the number of lug nuts (5) and the diameter of the bolt circle (108 mm). Incorrect bolt patterns can lead to serious safety issues, so always double-check.
- Offset: This measurement dictates how far the wheel mounting surface sits in relation to the wheel's centerline. The offset for Focus ST wheels typically falls within a specific range, but precise figures depend on the year and model. Improper offset can affect handling and clearance.
- Hub Bore: This is the diameter of the central hole in the wheel that fits over the vehicle's hub. The correct hub bore is critical for safe and secure wheel mounting.
Note: Always consult your owner's manual or a reputable parts catalog for precise wheel specifications tailored to your specific Focus ST year and trim.
Understanding the Importance of Each Spec
Each specification plays a critical role in the overall performance and safety of your vehicle:
- Diameter and Width: These impact the overall look, tire choice, and handling characteristics.
- Bolt Pattern: This ensures the wheel is properly secured to the vehicle's hub.
- Offset: Affects handling, wheel fitment, and potential rubbing against suspension components.
- Hub Bore: Guarantees proper centering and secure mounting of the wheel.
Focus ST Wheel Options and Upgrades
While the factory wheels are aesthetically pleasing and perform adequately, many Focus ST owners explore upgrade options. Here are some considerations:
Aftermarket Wheels
The aftermarket offers a vast selection of wheels in various styles, diameters, and finishes. However, choosing aftermarket wheels requires careful attention to the specifications mentioned above. Using incompatible wheels can severely compromise safety and handling. Ensure compatibility before purchasing.
Tire Considerations
Upgrading wheels often necessitates changing tires. Always select tires with the correct size and speed rating for optimal performance and safety. Consulting a tire professional is recommended.
Potential Issues with Upgrades
Larger diameter wheels can sometimes lead to:
- Reduced ride comfort: Larger wheels, especially with lower-profile tires, can result in a harsher ride.
- Increased unsprung weight: Heavier wheels can negatively impact handling and braking.
- Speedometer inaccuracies: Larger wheels might require speedometer recalibration.
Conclusion
The Focus ST's wheels are a crucial element of its performance and aesthetic appeal. Understanding the specifications of factory wheels and carefully considering the implications of upgrades is essential for maintaining safety and maximizing performance. Always consult your owner's manual and seek expert advice before modifying your vehicle's wheels and tires.
