Ext Shox eVra V2.1 Hs3 Air Spring Rake 44 mm Tapered 29" fork

The ERA V2.1 fork uses HS3, hybrid air spring. Two positive air chambers work with one, high volume self activating negative air chamber. Combined with a high-volume damper cartridge this system offers incredible tuning capability and sets a new level for support in a suspension fork. The Era V2.1 introduces features and upgrades that aims to improve the experience, safety and performance of the previous production.
At its core the Era V2.1 has the same configuration that made Era famous and appreciated: HS3 system, creak free crown, great mid stroke support, excellent stiffness and performance.
The Era fork has a magnesium lower design that makes them lighter and load-optimized and it’s made possible by a specific production process called Thixomolding. Other improvements are addressed to increase sensitivity, smoothness, lubrication and safety like the improved end-stroke devices for the HS3 system, the top up bump rubber and titanium plate that reduces noise on ++ chamber or the new DU design that grants better lubrication.
HS3 is focused on mid-stroke support around the dynamic sag position while offering amazing sensitivity and bottom out protection. The air spring is complemented by an integrated coil spring to create a frictionless sliding movement and a highly responsive fork giving the best grip to the front tyre.

Features

36 mm Ø stanchions
HS3, Hybrid coil and air spring: with 2 adjustable positive air chambers and high volume negative chamber
New Crown design: forged AL 7050 T6 to substantially increase stiffness
High volume Cartridge with Ø22 mm piston, engineered circuit to separate bump and rebound oil flow
HDRV unique compression valve system Ø24 mm piston
IFP reservoir Ø24 mm piston
Dropout 15QR Boost Torque Cap® compatible (15×110 mm)
3 way adjustable, Low and High speed Bump and Rebound
Main strut low friction system: new DU bushing material from our WRC technology combined with dedicated EXT oil
Cartridge and Air spring low friction System: innovative floating shaft guide combined with the EXT proprietary coating and superfinish chrome shaft.

Technologies

Hydraulic bottom-out control
The HBC system is a position sensitive damper valve made of a secondary piston assembled below the main one, and an inner tube near the bottom of the damper. When the rider gets close to the end of the stroke, the secondary piston goes inside the inner tube, forcing the oil flow through a calibrated orifice that characterizes the end stroke ramp up. EXT’s HBC system engages just in the last 15% of the stroke and it’s also externally adjustable to match your weight, riding preferences and style.
This system makes the compression progressive, allowing lower spring-rate settings of the dampers and offering a balanced feeling and better traction. So, you can rely on a very plush feeling and a great support on the last millimeters of your bike’s rear travel. On the graph it is shown how HBC controls the last part of the stroke. The peak on the right side is the strength achieved by the shock when the HBC is full closed. The Hydraulic Bottom Out Control adjuster is located just above compression valve.

Lok 2.0 system
All of our MTB dampers feature the LOK 2.0 proprietary EXT technology, (aka pro-pedal switch), already well-known throughout the product line up. A 2-Way lock-out system improved to avoid any kind of bobbing while you pedal on every types of surface. Completely customizable, the LOK system has a blow-off valve that prevents any kind of damage if you forget the LOK lever before a downhill ride. It is made up of a completely independent valve system that controls the oil flow in a separate chamber and allows you to get the support needed for the best pedaling efficiency. In open mode, the LOK circuit is excluded, and when closed, the oil must flow through a preloaded shimmed valve increasing compression force. This shim-based design provides enough sensitivity and support to increase overall traction on rough terrain. Now, the LOK 2.0 system can also be custom tuned based on rider preferences.

Air spring 3
The core of the Aria is in the innovative dual positive air chambers and a large negative self-equalizing chamber. This system allows for extensive control over the shock’s air spring curve characteristics, giving you fine tune capabilities throughout the entire stroke. The dynamic nature of EXT’s twin positive air chambers virtually eliminates all negative aspects intrinsic to the volume spacer systems of competitors.