ST Suspensions Lowering Springs for BMW Z4 E89 Roadster (2009-2016) 35i/35is - Sport Drop Springs 20mm Front 10mm Rear - Performance Coil Spring Set, Suspension Lowering Kit, Adaptive Damper Compatible (Z89/ZR)

ST performance springs for BMW Z4 E89 Roadster 35i and 35is 2009 onwards

Transform the stance and street dynamics of your BMW Z4 E89 with this premium ST sport spring set. Expect a clean, purposeful drop that trims wheel gap while keeping everyday usability. Developed specifically for this chassis, these coils work seamlessly with the factory dampers, including cars equipped with electronic damping systems, for a balanced, road-focused upgrade that looks right and feels right.

Fitment and key figures

• Vehicle: BMW Z4 E89 Roadster, including Z89 and ZR variants
• Engines: 35i, 35is
• Approximate ride height change: front 20 mm, rear 10 mm
• Permissible front axle weight: up to 870 kg
• Permissible rear axle weight: up to 1000 kg
• Power range: 225 to 250 kW

Why enthusiasts choose this setup

• Sharper look with a tasteful, even drop that maintains daily comfort
• Factory-grade construction for long-term reliability
• Durable epoxy finish to resist corrosion and road grime
• Compatible with adaptive damping systems where fitted
• Chrome-silicon alloy spring steel for strength and consistency
• Vehicle-matched spring rates for the E89 platform
• Multi-stage heat treatment for stability over time
• Partly tubed design as specified by ST

Real-world results

We have installed these on customer Z4s and the feedback has been consistently positive. Owners love the improved road presence, reduced arch gap and the confident, composed feel on fast A-roads without ruining everyday ride quality.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and lead times. We are happy to advise on compatibility, geometry setup and alignment after installation.

Compatibility checklist

• Confirm your axle weight ratings do not exceed 870 kg front and 1000 kg rear
• Suitable for vehicles within 225 to 250 kW output range
• Works with standard dampers, including models with electronic damping

What you gain

Lower centre of gravity, a tidy stance, reduced wheel gap and a precise, confident feel on B-roads. This is a tasteful ride height reduction that complements the BMW Z4 E89’s character rather than overwhelming it.

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