Description
New limited run Black Edition Ferro Arma MX package
Now with DLC (Diamond-Like Coating) Coated Stanchions - for increased durability and performance!
Package Includes:
-Black Edition EXT FERRO Front Fork
-Black Edition EXT Arma MX Rear Shock
If your desired spring rate is sold out please contact us via email ([email protected]) or via our website chat.
If installing on an MX4 or E Ride Pro SS, you will need a 220mm rotor adapter.
PRE-INSTALLATION SERVICES
Make installing your new fork a breeze with our pre-install kit and service. When you purchase the Fork Install Kit and the Fork Install Kit Service your fork will arrive already cut to length, starnut installed, and lower steer tube bearing pressed onto your fork and greased. This avoids having to buy expensive special tools or convincing your local MTB shop to do this install for you (most won't). You'll be able to install your fork with basic tools that you probably already have. For easy install you will also need a boost spacer to bolt wheel to fork.
EXT USA
Known for its industry leading reliability and performance, you can now have access to the best upgrade suspensions package on the market, purposely built to boost the performance of your electric dirt-bike.
The Ferro MX has hard heat-treated chrome moly steel stanchions (Superfinish surface treatment), 7000 series aluminum construction upper legs and a 200mm travel design with a dedicated triple clamp, make the core of the new 36mm USD fork, developed for minimum friction and high stiffness.
The Arma MX is a direct bolt-on replacement for the Sur Ron Light Bee X, Talaria Sting (MX3 and MX4) & xXx, E-ride Pro S and SS. No additional Hardware is needed, simply bolt-on and go. Shock will be pre tuned by EXT-USA on the information you provide.
EXT ARMA MX FEATURES
Engineered with performance and control as primary objectives, the shock structure has seen a redesign in order to be more robust. The Hydraulic Bottom-Out Circuit (HBC) has been enhanced with a wider range of adjustment, in order to prevent bottom-out issues, while allowing riders to use softer spring rates and providing excellent support and end stoke characteristics.
- 4 way adjustable: LSC-HSC-LSR-HBC (Hydraulic Bottom-Out Control)
- High flow 29 mm main piston
- 24 mm valve piston
- 14 mm shaft (50% larger than most other coils on market to help deal with large side loading events)
- Engineered rebound circuit to separate bump and rebound oil flow – Ultra low-friction coating
- User adjustable HBC technology
- Very low reservoir pressure for maximum sensitivity and low cavitation(55 PSI)
- Full custom hydraulic setup that is bike and rider specific for each shock
- Very low hysteresis for high dynamic response
- High turbulent flow for progressive dampening and mid stroke support
- Low friction seal
- Thinner bottom-out bumper and debris clearing washer
- New low profile rebound knob for easy spring swap
- Included with 1 light weight spring available in 400lb, 450lb, 500lb, 550lb, 600lb or 650lbs (Lower options may be available upon request)
- Comes with Sur Ron specific mounting hardware for easy bolt in instillation.
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BE SURE TO SELECT THE CORRECT SPRING RATE BEFORE HITTING THE BUY BUTTON.
Spring Rate Suggestions
The advanced tuning available on this shock allows a high degree of adjustment and tuning for the rider to dial in exactly how you want this shock to perform, from ultra-plush to ultra-stiff to anything in-between. Please see the recommended settings at the bottom of this page.
Rider Weight Spring Ext Swingarm <150 400 450 150-170 450 500 170-195 500 550 195-220 550 600 220-250 600 650 250+ 650
EXT FERRO FEATURES
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.
Sliding Bushings:
We looked at everything that needed a low friction solution to improve smoothness and sensitivity. This process took us back to our 14 World Rally Championship wins, that make EXT the most successful suspension manufacturer in WRC. Our new DU bushing material used in the new FERRO USD 36 fork are sized to a defined tolerances for each fork assembly and works in harmony with our dedicated EXT oil. This guarantees zero stiction and super low friction properties even when combined with high side loads.
The dedicated DU guiding system made with a specific superlong bushing overlap ensures the maximum guidance and the best torsional rigidity of the stanchions. (We’ve called it, CGB, Continuously Guided Bushing system which also helps to increase the dynamic stiffness).
Wheel Axle: Twin hexagonal head floating wheel axle guarantees perfect wheel alignment, while assuring maximum torsional rigidity.
High Flow Damper Cartridge
The new FERRO USD 36 inherits the best technologies that made famous our well-known ERA V2 and it adopts an innovative radial floating shaft guide in the damper cartridge with a Superfinish surface treatment with new aeronautical seals, which takes the friction to the lowest possible level. EXT high-volume cartridge uses a high flow piston to generate control for your bike, an important performance upgrade for your riding. The large piston design allows the best damping control. The cartridge is also equipped with a bump valve design (HDRV – High Dynamic Response Valve) with 2 different shim stacks for mid and high speed and an Internal Floating Piston (IFP) guided and combined with a bespoke thrust bearing to enhance fast response and guidance. Our goal has always been to find a balance between all the internal cartridge pressures and through a long development process we made possible the optimization of the internal forces reaching low values of hysteresis and no cavitation.
- 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.