Dežru Suspension  Spec-S for 11-19 Ford Fiesta/ Fiesta ST SPECS-1119FIESTA

The Dežru Spec-S Coilover System is designed for the Ford Fiesta platform, offering a street-focused performance suspension upgrade that balances responsive handling with everyday comfort. Developed for the Fiesta's compact dimensions and agile chassis, the Spec-S combines digressive monotube dampers, linear-rate HyperCoil springs, and adjustable damping to help improve chassis control, stability, and driver confidence.

Designed for drivers who use their Fiesta as a daily vehicle but also enjoy spirited street driving, winding roads, and occasional high-performance driving events (HPDE), the Spec-S emphasizes controlled suspension movement without relying on excessive stiffness. Its digressive piston valving is designed to provide supportive damping during braking, cornering, steering inputs, and rapid transitions while retaining compliance over uneven pavement.

The system features fixed-length damper bodies and approximately 25–35 mm of adjustable lowering, creating a sportier stance while aiming to maintain useful suspension travel and predictable handling. The adjustable damping allows drivers to fine-tune suspension response to suit their driving preferences and road conditions.

With specified spring rates of 250 lb/in front and 225 lb/in rear, the Spec-S is designed to provide a balanced foundation for street-focused performance. Combined with its digressive damping characteristics, this spring combination aims to improve body-motion control and responsiveness while retaining the practical usability expected from a compact hatchback.

Key Features

• Digressive Monotube Dampers: Designed to deliver controlled body movement and responsive damping during braking, cornering, and directional changes.

• Adjustable Damping: Allows suspension response to be fine-tuned for daily driving, spirited street use, and occasional HPDE events.

• Fixed-Length Damper Bodies: Engineered to support consistent suspension operation within the intended ride-height range.

• Adjustable Ride Height: Provides approximately 25–35 mm of lowering for a sportier stance and a lower center of gravity.

• Vehicle-Specific Spring Rates: Includes 250 lb/in front and 225 lb/in rear springs, as specified for this application, to balance suspension support and street usability.

• Linear HyperCoil Springs: Designed to provide predictable spring response and consistent support throughout suspension travel.

• OEM-Style Upper Mounts: Intended to retain a refined driving character while helping minimize unnecessary noise, vibration, and harshness (NVH).

• Hand-Built, Dyno-Matched Dampers: Prepared in matched pairs to promote consistent damping characteristics from side to side.

Performance Character

The Dežru Spec-S is designed to make the Ford Fiesta feel more composed and responsive during everyday driving and more controlled when driven enthusiastically. Its digressive damping profile aims to provide support during initial steering inputs and weight transfer, helping manage body motion during braking, cornering, and rapid transitions.

The 250 lb/in front and 225 lb/in rear spring combination is intended to balance front-end support with rear suspension compliance. The slightly higher front spring rate may help manage front suspension compression, while the rear spring rate contributes to the overall handling balance. Actual understeer, rotation, grip, and ride comfort depend on suspension geometry, damper settings, alignment, tires, and vehicle configuration.

On ordinary roads, the Spec-S aims to retain useful compliance over imperfect surfaces while providing a more controlled driving experience. For spirited street driving and occasional HPDE use, adjustable damping offers additional flexibility to tailor suspension response to the driver's preferences.

Why Choose 250 lb/in Front and 225 lb/in Rear Spring Rates?

The Fiesta is a compact, front-wheel-drive platform designed around agility and everyday usability. Under enthusiastic driving, body roll, forward weight transfer during braking, and front-end understeer can influence the car's behavior.

The specified 250 lb/in front and 225 lb/in rear spring rates are intended to improve suspension support without relying on unnecessarily high spring rates.

Front suspension — 250 lb/in

The higher front spring rate is designed to provide additional support under braking and cornering loads. When matched appropriately to the dampers and suspension geometry, it can help manage suspension compression and contribute to more controlled steering response.

Rear suspension — 225 lb/in

The slightly softer rear spring rate is intended to retain compliance while contributing to the vehicle's overall balance. The resulting rotation and understeer characteristics will depend on the complete suspension setup rather than spring rates alone.

Expected setup goals:

• Better control of body movement during braking and cornering.

• More composed steering response during directional changes.

• A balanced relationship between front-end support and rear compliance.

• A street-oriented ride suited to daily driving and spirited use.

The Spec-S pairs these spring rates with digressive damping, which is designed to provide chassis support during initial suspension movement while retaining compliance over road imperfections. The goal is a controlled, predictable setup rather than an unnecessarily harsh ride.

Ride Height and Suspension Setup

The Spec-S provides approximately 25–35 mm of adjustable lowering compared with factory ride height. This allows owners to achieve a more purposeful stance while retaining practical ground clearance and suspension travel when appropriately configured.

After installation, a professional alignment is recommended. Ride height should be set within the manufacturer's approved adjustment range, with adequate tire clearance and suspension travel maintained.

Who Is It For?

The Dežru Spec-S Coilover System is suited to Ford Fiesta owners who want:

• Improved chassis control during braking and cornering.

• A more responsive and composed driving experience.

• Adjustable damping for different road conditions and driving styles.

• A moderately lowered stance.

• A balance of daily comfort and spirited street performance.

• A suspension setup for occasional HPDE use, subject to appropriate configuration.

Vehicle Fitment

Vehicle: Ford Fiesta / Fiesta ST
Model Years: 2011–2019, subject to manufacturer confirmation
Front Spring Rate: 250 lb/in
Rear Spring Rate: 225 lb/in
Damper Type: Digressive monotube
Damping: Adjustable
Ride-Height Adjustment: Approximately 25–35 mm below OEM height
Springs: Linear-rate HyperCoil
Upper Mounts: OEM-style
Damper Matching: Hand-built, dyno-matched pairs

Fitment note: Confirm compatibility by model year, market, body style, and trim. Standard Fiesta and Fiesta ST applications may use different suspension components, so compatibility with both should not be assumed without manufacturer confirmation.

Disclaimer: This product is built to order. Please allow approximately 3–4 weeks for production before shipment.