AST Suspension

AST Suspension has been engineering shock absorbers and performance suspension since 2000, building a European reputation for quality control, in-house manufacturing, and a range that runs from normal street use through to race, rally, autocross, quads, and karting. The AST range at Springrates covers AST coilovers, AST lowering springs, and supporting shock absorber products, all developed and produced through AST's full in-house process at the company's Netherlands headquarters in Valkenswaard.

AST's defining trait is control over the production chain. The company handles development, manufacturing, and testing internally and makes 100% of its products in the Netherlands, which keeps quality consistent and lets it offer custom production for specific applications at a competitive price-to-quality ratio. 

AST also owns Moton Suspension Technology, acquired in 2011, with shared engineering resources across both labels. Since joining the Roosen Industries group in 2016, the company has continued expanding its product range and motorsport footprint while holding its core engineering philosophy intact.

Key features and benefits

  • In-house European engineering and manufacturing - AST designs, builds, and tests every product in the Netherlands, controlling the full process from design to final assembly.
  • AST coilovers across a tiered range - from the height-and-rebound-adjustable 4100 and 5100 series for street and track-day use, up to the 2-way 5200 series and 3-way motorsport dampers with remote reservoirs.
  • Mostly monotube damper construction with low-friction seals for cavitation resistance and consistent damping, plus KTL anti-corrosion coating on street-oriented kits.
  • AST Suspension lowering springs for drivers who want a stance and handling upgrade without a full coilover kit. They're vehicle-specific OEM-replacement springs, coiled on Wafios machinery to lower the car while keeping ride comfort.
  • Shared engineering with Moton, so AST kits inherit damper technology developed alongside the Moton motorsport range.
  • Custom production capability for specific applications, racing programs, or industrial requirements outside the standard catalog.

How to choose the right AST setup

Start by matching the kit to how the car gets used. For a street-driven car with occasional spirited use, the 5100 Street Series gives you full height adjustment and 12-position 1-way (rebound) damping on an inverted monotube, tuned for a civilized ride that still handles a track day. The 4100 series is a similar height-and-rebound-adjustable monotube option. Step up to track, autocross, or competition use and the 5200 series adds independent compression and rebound adjustment with a remote reservoir, with 3-way motorsport dampers above it for serious race programs.

If you don't need ride-height adjustability, AST lowering springs paired with quality dampers deliver a meaningful stance and handling upgrade at lower cost. For drivers who are cross-shopping, AST sits between mass-market mid-tier coilovers and premium European brands, and the engineering depth shows in the price. The closely related Moton range is the next step up for serious motorsport. Browse the wider coilovers range at Springrates for comparison.

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FAQs

What types of vehicles does AST make suspension for?

The catalogue is broad: street performance cars, race cars, rally vehicles, autocross builds, quads, karts, and industrial applications. Coverage is strongest on European performance platforms, with growing support for Japanese, American, and other vehicles. Our team can confirm availability for your car before you order.

Where are AST Suspension products made?

AST designs, manufactures, and tests its products at its headquarters in Valkenswaard, Netherlands, and produces 100% of them in-house there. That control over the full production chain is central to how the brand keeps quality consistent and offers custom production for specific applications.

Are AST coilovers good for daily driving?

Yes, with the right spec. The 5100 Street Series and 4100 series are tuned for road use with adjustable rebound, so you can set the ride for daily comfort and still firm it up when you want it. AST's European engineering pedigree shows in refined damper feel, which is what matters most on a daily-driven car.

How much do AST coilovers lower a car?

That depends on the chassis and which series you choose, since every AST coilover uses full-length height adjustment set at the lower mount. This lets you dial in anything from a subtle drop to an aggressive stance while keeping proper shock travel. Tell us your vehicle and target look, and we'll confirm the achievable range for that specific kit.

Are AST products rebuildable?

Yes. AST dampers are built to be serviced and rebuilt as wear shows, and service runs through AST's European network. That extends the useful life of the damper considerably, which is especially relevant for race and rally use where damper life is shorter than on a street car.

What's the difference between AST Suspension and Moton?

AST acquired Moton in 2011, and the two brands now share engineering and manufacturing resources within the AST group. AST products cover the street-performance and motorsport range, while Moton sits at the premium motorsport end with race heritage from FIA GT, WTCC, and Le Mans. If you're comparing the two, AST is the broader, more accessible range and Moton is the upgrade where competition-grade damping is the priority.

How does AST compare on price?

AST sits between mid-tier coilover brands and premium European motorsport names. The pricing reflects in-house European engineering and 100%-Netherlands manufacturing, and the value is in the engineered package and long-term serviceability as much as the spec sheet.

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