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SHOWA SPIRE 2.5 ARC 2 coilover shock

TYPE 03

Spire

Adjustable Ride Control – ARC 2

SPIRE 2.5 delivers elite ride control over the most challenging terrain. The advanced custom tuning capability of ARC 2 (Adjustable Ride Control) is combined with dual end stops for max control over whatever trail you want to conquer.

Engineering

Features

Dual-Speed External Compression Adjustment (ARC 2)

  • Separates low-speed and high-speed damping control, adjusted manually at the shock
  • Low-speed adjustment tunes primary ride characteristics: steering feel and body motion over large terrain features
  • High-speed adjustment tunes the shock's response to sharp bumps and impacts
  • Both adjustments are made by hand, at the shock, without tools or a professional tuner, no electronics involved

Hydraulic End Stop Control at Both Ends

  • HCS & HRS (Hydraulic Compression Stop & Hydraulic Rebound Stop) are internal valving mechanisms that cushion hard impacts from compression and rebound at the top and bottom of maximum piston travel

2.5" Aluminum Body with Hard-Anodized SHOWA Gold Finish

  • High-strength aluminum for maximum heat dissipation and fade resistance
  • Coilover / Smooth body

22mm Piston Rod

  • Case-hardened steel delivers abrasion resistance, durability and longevity

Threaded Seal Head Assembly

  • Makes SPIRE shocks rebuildable and increases structural dependability during high internal hydraulic pressure spikes
  • Alternative to a C-clip retention design

Fully Gas-Separated Monotube Architecture with Free-Floating Piston

  • Piggyback or remote reservoir: application-specific configuration

Custom Applications

  • Custom builders can select SPIRE shock options best suited for your specific off-road application
  • 12"–14" stroke range

Adjustable Lower Spring Seat

  • The lower spring seat is threaded and tool-adjustable for ride-height and corner-weight adjustment
  • No hammer or drift punch required

Custom Main-Body Thread Profile

  • Engineered to reduce slider wear and increase thread durability over time

Pressure-Actuated Cup-Style Hydraulic Seal

  • Increases sealing force as internal pressure rises, reducing base friction at low pressure compared to a standard compressed O-ring seal

Scraper-Style Dust Wiper

  • An aggressive scraper-style dust wiper engineered to clear dirt and grit from the shaft before it can reach the shock's internal seals

Sealed Spherical Spring-Eye Bearings

  • 17mm ID / 30mm OD
  • Allow the shock to self-center through its full range of motion while resisting contamination

SHOWA-Tuned Coilover System

  • Engineered end-to-end from SHOWA-designed components rather than built around OEM parts
  • Flat-ground coil springs are matched to the application by SHOWA's own tuning