• Robust dual crown inverted MX design (USD)
• 36mm Ø hard chromed steel stanchions (heat treated 42CrMo4) with Superfinish surface treatment
• HS3 3- twin positive air system ¬+ 1 large negative self-balancing air chamber, allows for an optimum level of support through all the travel

• High flow 3-way cartridge damper system with independent high & low speed compression plus rebound damping adjustment.
• Superfinish inner tube coating
• External pressure air release system on both legs
• Twin hexagonal floating axle, boost compatible ∅20mm
• Air spring and cartridge radial guide system with bespoke aeronautical seals (minimize friction on
• side loads)
• Large piston design for best damping control and separate IFP/coil energized compression valve
• No cavitation and low hysteresis
• Self-hydraulic cartridge bleeding
• Dedicated Mobile Sliding DU guiding system with super-long static overlap (for maximum guidance
• and best torsional rigidity). (CGB Continuously Guided Bushing system, increase stiffness)
• 205 mm of travel and 44 mm offset
• 200 mm post mount brake
• Weight 4000gr
• Pressure release one-way valves on both legs
• Compatible with stock fender design 
• Boost Hub Spacing for more flexibility with after market wheel sets.

HS3

The FERRO USD 36 fork uses the HS3 technology, the unique hybrid
air spring system, already been famous with the appreciated ERA V2.
Two separate positive air chambers work with one, high volume
self-equalizing negative air chamber; HS3 is focused on mid-stroke
support around the dynamic sag position while offering amazing
sensitivity and bottom-out protection

Fork Structure

Dual Crown Structure:

The robust double crown design in 7075 aluminum ensures maximum stiffness. Crown design is compatible with stock fender designs.