EXT
ByEXT

EXT Arma V4

CORE FEATURES 3 way adjustable: LSC-HSC-LSR with new 5mm Allen adjustment for HSC for easier tuning Unique patent pending PSR technology to avoid harsh top out Improved adjustable HBC technology: Effective through last 20% of the stroke with more energy absorption due to new hydrostatic seal design 14mm diameter diamond like carbon (DLC) coated shaft. Most advanced engineering coating available for durability and low friction. New Spring Thrust Bearing for improved alignment and noise reduction. New large volume bladder design with very low reservoir pressure (55psi) to ensure maximum sensitivity. New high viscosity index oil to provide improved consistency over a wide range of operating temperatures. 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 Full custom hydraulic setup that is bike and rider specific for each shock Low cavitation 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 Price is for damper only. Springs are available on the product page and a 2nd spring can be purchased at a discounted rate. *All Shocks are custom built and tuned for specific bike, rider weight and riding style. If you aren't sure about an option, just leave it blank and we'll get in touch if we have questions. Note: AFMLOW RIDERS: Due to the tight frame clearance on Amflow frames, we are recommending a maximum rider weight of 230lbs. To ensure frame clearance, riders over a 170lb will most likely require and be shipped with a C55 spring-size. C55 spring rates max out at 650lbs rate, which calculates to a 230lb rider weight. If you are over the recommended maximum rider weight, your spring may touch your frame under full compression.

$1,200MSRPIn stock at brand
Suspension · Rear ShockEXT Arma V4
TypeRear Shock
Disciplinemountain
TypeRear Shock
Variants2424 sizes or options
Weight443 gManufacturer claimed
01 / About

The EXT Arma V4.

EXT's take on suspension.

CORE FEATURES 3 way adjustable: LSC-HSC-LSR with new 5mm Allen adjustment for HSC for easier tuning Unique patent pending PSR technology to avoid harsh top out Improved adjustable HBC technology: Effective through last 20% of the stroke with more energy absorption due to new hydrostatic seal design 14mm diameter diamond like carbon (DLC) coated shaft. Most advanced engineering coating available for durability and low friction. New Spring Thrust Bearing for improved alignment and noise reduction. New large volume bladder design with very low reservoir pressure (55psi) to ensure maximum sensitivity. New high viscosity index oil to provide improved consistency over a wide range of operating temperatures. 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 Full custom hydraulic setup that is bike and rider specific for each shock Low cavitation 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 Price is for damper only. Springs are available on the product page and a 2nd spring can be purchased at a discounted rate. *All Shocks are custom built and tuned for specific bike, rider weight and riding style. If you aren't sure about an option, just leave it blank and we'll get in touch if we have questions. Note: AFMLOW RIDERS: Due to the tight frame clearance on Amflow frames, we are recommending a maximum rider weight of 230lbs. To ensure frame clearance, riders over a 170lb will most likely require and be shipped with a C55 spring-size. C55 spring rates max out at 650lbs rate, which calculates to a 230lb rider weight. If you are over the recommended maximum rider weight, your spring may touch your frame under full compression.

02 / Specifications

EXT Arma V4 spec sheet.

Everything EXT publishes for the EXT Arma V4.

01Overview
5 fields
Type
Rear Shock
Discipline
mountain
Brand
EXTExternal
SKU
02Suspension
6 fields
Type
Rear Shock
Damper type
coil
Axle standard
Stanchion dia. (mm)
Steerer standard
Max rotor (mm)
03Pricing & availability
4 fields
Price
$1,200USD · MSRP
Sale price
$1,200Currently on sale
Availability
In stockDirect from brand
Weight
443 gManufacturer claimed
04Additional specs
6 fields
Spring Type
coil
High Speed Compression
true
Low Speed Compression
true
Rebound Adjustment
true
Lockout
false
Trunnion Mount
true
03 / Variants

24 variants available.

Sizes, colors, and configurations published by the brand.

Total variants24Indexed in GearWise
Eye-to-eye (mm)185–250 mm6 distinct values
Stroke (mm)47.5–75 mm12 distinct values
#Eye-to-eye (mm)Stroke (mm)
01210mm47.5mm
02210mm50mm
03210mm52.5mm
04210mm55mm
05230mm57.5mm
06230mm60mm
07230mm62.5mm
08230mm65mm
09250mm67.5mm
10250mm70mm
11250mm72.5mm
12250mm75mm
13185mm47.5mm
14185mm50mm
15185mm52.5mm
16185mm55mm
17205mm57.5mm
18205mm60mm
19205mm62.5mm
20205mm65mm
21225mm67.5mm
22225mm70mm
23225mm72.5mm
24225mm75mm
04 / Reviews

From the cycling press.

6 reviews from 4 sources.