Dedicated E-Moto Platform
ARMA-MX is based on EXT’s established ARMA MTB damper but uses a dedicated platform developed for the higher loads and demands of electric dirt bikes.
EXT ARMA-MX | E-MOTO Shock
$1,795.00
/
Couldn't load pickup availability
EXT ARMA-MX is an E-Moto damper developed for electric dirt bikes. Based on the ARMA MTB platform, it uses a dedicated 267 x 87 mm design built for the higher loads and demands of off-road electric vehicles.
KEY FEATURES
- 267 x 87 mm E-Moto damper
- Machined 7075 T6 aluminium head
- Long reservoir body for the extended damper stroke
- Chromed steel shaft with low-friction coating
- Dedicated eyelet design with spherical bearings
- High-flow piston and revised compression valve
- Externally adjustable HBC bottom-out control
- Low-pressure reservoir for sensitivity and reduced friction
- Spring sold separately
FIND IT IN NEARBY STORE
FIND IT IN NEARBY STORE
Customers Also Bought
EXT ARMA-MX
ARMA DNA.
BUILT FOR E-MOTO.
Best Suited To
Electric dirt-bike riders, especially Sur-Ron applications, requiring
increased mechanical strength, high sensitivity and adjustable
bottom-out protection.
Size
267 × 87
Dedicated E-Moto shock size
Reservoir
55 PSI
Low-pressure air reservoir
Head
7075 T6
Machined solid aluminium construction
Control
HBC
Externally adjustable bottom-out control
Why Choose the ARMA-MX?
Proven ARMA Performance for Electric Dirt Bikes
Increased Strength
A machined 7075 T6 head, steel chromed shaft, reinforced eyelet design and high-load spherical bearings improve strength and reliability.
Sensitivity and Control
The low-pressure reservoir, high-flow piston and low-friction components help improve sensitivity, traction and consistent performance.
Technical Information
Detailed Specs
Product construction, fitment, damping and control information for the EXT ARMA-MX.
Fitment and Dimensions
Product Platform
E-Moto rear damper
Available Size
267 × 87 mm
Intended Application
Electric dirt bikes
Primary Vehicle Focus
Especially suited to Sur-Ron E-Moto applications
Design Foundation
Developed from EXT’s established ARMA MTB damper
Spring
Sold separately
Strength and Construction
Shock Head
Newly designed head machined from solid 7075 T6 aluminium
Head Design Purpose
Increased resistance and reliability for heavier E-Moto use
Damper Shaft
Steel chromed shaft for increased strength
Shaft Surface Treatment
Proprietary low-friction coating to reduce sliding friction
Eyelet Design
Dedicated reinforced eyelet for improved toughness and reliability
Bearings
High-load spherical bearing system
Reservoir Body
Extended reservoir body designed for the longer damper stroke
Riding Environment
Off-road and motocross-track E-Moto use
Damper and Sensitivity
Reservoir Pressure
55 psi
Reservoir Design
Large, low-pressure reservoir system
Main Piston
New high-flow piston design
Piston Purpose
Improved sensitivity and damper tunability
Compression Valve
New compression-valve design
Compression Performance
Wider adjustment range with smoother and more consistent damping
Temperature Management
Longer reservoir supports sensitivity at higher operating
temperatures
Bearing Performance
Reduced friction with improved small-bump sensitivity and traction
Bottom-Out and Platform Control
Bottom-Out System
Externally adjustable HBC
HBC Function
Adds progressive compression near the end of the shock stroke
Bottom-Out Protection
Designed to reduce harsh bottom-out impacts
Traction Benefit
Allows a more compliant setup while retaining end-stroke support
Negative Spring
Strong internal negative spring
Negative Spring Function
Improves platform stability and protects against harsh top-out
Cover Guiding
Redesigned cover-guiding system
Rear-Wheel Support
Designed to better manage rear-wheel and swingarm loading
Support
Manuals and Official Resources
EXT Fiveplus Warranty Program
5 Year Warranty
From 1 January 2025, EXT’s current MTB and E-MX product range is eligible for the Fiveplus program. It adds three years of additional coverage to the original two-year legal warranty. Registration must be completed within 30 days of purchase, and a yearly full maintenance service is required to keep the extended coverage valid.