EXTArma V4

€1,100 EU RRP, spring sold separately (listed as 1100,00 €/$)

Type: Coil, piggyback (DH)
Adjustments: HSC, LSC, HBC
Mounts: Metric standard / trunnion
Shaft: DLC-coated chrome-moly
Lockout: None (LOK on Storia only)

Overview

EXT Arma V4: coil downhill shock with PSR top-out, adjustable HBC and DLC-coated shaft, priced at EUR 1,100 (spring sold separately).

The Arma V4 is EXT's coil downhill shock, launched alongside the Storia V4 and sharing its refinements: PSR (Position Sensitive Rebound) hydraulic top-out, frequency-dependent damping, an externally adjustable HBC and a DLC-coated chrome-moly shaft. Unlike the Storia, it does without the LOK pedalling circuit.

The new HBC starts in the last 20% of the stroke, which EXT says allows a lower spring rate for compliance, traction and control. High- and low-speed compression are adjusted with 5 mm and 4 mm Allen keys, and a 55 psi bladder reservoir, EV2S fluid and new DLC/DHC coatings target sensitivity and durability.

Coil DH shock from the V4 series
PSR hydraulic top-out and frequency-dependent damping
Adjustable HBC acting in the last 20% of stroke
HSC/LSC adjustable with common 5 mm and 4 mm Allen keys
EUR 1,100 RRP (spring separate)

Gallery

Full specifications

Damper

Top-out: PSR position-sensitive rebound hydraulic top-out
Bottom-out: Adjustable HBC, starts in last 20% of stroke
Compression: High- and low-speed, adjusted with 5 mm and 4 mm Allen keys
Valving: High turbulent flow valves; frequency-dependent damping
Fluid: EV2S
Reservoir: Large-volume bladder, 55 psi

Chassis

Shaft: Chrome-moly steel, proprietary DLC coating
Body: Proprietary DHC tube coating

Spring

Spring: Coil, sold separately; spring thrust bearings

Compatibility

Metric standard: 210/47.5–55, 230/57.5–65, 250/67.5–75 mm (2.5 mm steps)
Metric trunnion: 185/47.5–55, 205/57.5–65, 225/67.5–75 mm (2.5 mm steps)

General

Warranty: 5 years (2-year legal + 3-year Fiveplus extension)

Manufacturer specification — EXT. Specs and prices can change; check with the brand or your dealer.

EXT Arma V4: FAQ

How much does the EXT Arma V4 cost?

€1,100 (EU RRP, spring sold separately (listed as 1100,00 €/$)). Prices vary by country and retailer.

Is the EXT Arma V4 suitable for e-bikes?

EXT does not specifically rate it for e-bikes. Check the manufacturer’s approval and your bike maker’s recommendations before fitting it to an eMTB.

What are the key specs of the EXT Arma V4?

Type: Coil, piggyback (DH); Adjustments: HSC, LSC, HBC; Mounts: Metric standard / trunnion; Shaft: DLC-coated chrome-moly; Lockout: None (LOK on Storia only).