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Forestal Hydra Halo 29" Bike 2022 Golden Camo S

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  • 29" downhill
  • Carbon frame
  • GPS
  • Integrated display
  • Pedal assisted
: Golden Camo
Golden Camo


Product Details

Born to tackle the most extreme terrain,
to embrace the World Cup racing spirit.
This is the ultimate e-Downhill Bike.

Hydra - The beauty and speed of downhill racing represented in pure carbon. Never has something so rugged looked so sophisticated.


Elegant and clean lines meet next-level engineering. This is the unmistakable Forestal signature design.


Extreme carbon.
Hydra's Alpha Box has been re-engineered to offer maximum strength without sacrificing traction or comfort.


Based on Siryon, the Forestal Hydra keeps a race-ready weight to stiffness ration (weight without motor and hardware).


Carbon Cocktail - A blend of T1000, T800 and T700 carbon fibres for extreme precision rigidity.


Alpha Box Symmetric. A monocoque construction thought for the highest level of demand on the tracks.

63° / 62.7°*

Head tube angle

Race-ready geometry with handling to match, for a genuinely quick ride.

*Geometry details present small variations between Hydra Halo and Hydra Diōde due to small specification differences from suspension manufacturers.

76° / 75.7°*

Seat tube angle

-18mm / -16mm*

BB drop


Recommended height
< 165 cm


Recommended height
165 cm – 177 cm


Recommended height
177 cm – 187 cm


Recommended height
> 187 cm

Fits every rider.
Size-specific chainstay lengths and optimal reach for a
balanced handling whatever your size.

Suspension System

Twin Levity

The simplicity and clean lines of a single pivot suspension design combined with the tuned kinematics of our Twin Levity linkage system. An innovative lightweight suspension system for a smooth, supple, fast and active ride.

Patented Twin Levity suspension system with Hydra-specific downhill tune.

Single pivot, rocker and connecting rod, with linkage-driven kinematics.

Balance, performance and precision. Twin Levity is adjusted to provide the perfect ride.

Secure, direct in-mould main bearings.

Smooth floating linkage design.

Reduced component stress means Hydra will serve you long.








Ready to tame any terrain.


Twin Levity suspension for Hydra has been fine-tuned for extreme downhills and high-speed runs. Features coil shocks for extra aggressive behaviour and DH-looks, still being suitable for air shocks.



Hydra is a downhill race weapon and uplift shuttle in one. Benefitting from EonDrive's elegant integration and natural Active Flow assist, Hydra is the go-anywhere e-Downhill bike.


The lightest and most compact high-performance motor today.


A narrow Q-factor for a natural riding position.

250W / 60 Nm

Range and torque to maintain trail flow.


Standard chainrings and ISIS chainset.


Protection against the elements.

Built to last from the highest quality materials. EonDrive uses titanium for key components and is housed in a magnesium shell.

Without assistance, EonDrive is completely disengaged, bringing zero friction to the transmission. No noise, no drag, only resistance-free and intuitive pedalling.



The Aurora battery is a technological masterpiece. Fully integrated, lightweight and incredibly energy efficient.

360Wh 51V

Incredibly light and compact. Optimized to the maximum range.

1h 24min

Rapid charge technology brings Aurora to 80% capacity in just 84 minutes.


Smart Dashboard

An immersive 3.2" touch-screen display boasting stunning high-definition visuals.


  • Navigation
  • Maps
  • Geolocation
  • Anti-theft
  • Battery status
  • Assist control
  • Bike notifications
  • Record
  • Synchronize
  • Statistics
  • Training
  • Heart rate
  • Power
  • Speedometer
  • Elevation
  • G-force
  • Air time
  • Updates

Through this crisp clear panel, you can keep track of information, directions and more all while on a ride.


Smart Trigger

Minimalistic and multifunctional method of controlling the most advanced cycling system on the planet. Responsive controls to provide interference-free fun for any rider.


Forestal app

A world of information at your fingertips.



  • Geolocation
  • Anti-theft
  • Activities
  • Statistics
  • Strava
  • Bike condition
  • Notifications
  • Battery data
  • Motor data
  • Biometrics
  • Settings
  • Maintenance
  • FAQs
  • Manuals
  • Warranty
  • Chat
  • News
  • Updates

Our custom coded App connects your smart device to Siryon. There you will discover a wealth of data, stats and valuable tools to help you make the most of your ride.



Suspension RockShox
Boxxer Select / Super Deluxe Select+
Brakes Formula
Cura 4
Drivetrain SRAM
Wheels Crankbrothers
Synthesis Alloy DH
Weight Frame size M (42.3 lbs)
19,2 kg
Frame Forestal Alpha Box Carbon Enduro 29" TR 170
Monocoque construction / Track Ready / 170mm Travel / 2.4kg Size M
Sizes S / M / L / XL
Motor Forestal EonDrive
250W / 60Nm / IP67 / 1.95kg / 165 x 105 x 147mm
Battery Forestal Aurora Performance
360Wh / 52V / Integrated / Rapid Charge / 1.8kg / 350 x 72 x 50.5mm
Display Forestal Smart Dashboard
3.2" Integrated HD Transflective touch screen / All conditions resistant
Remote Forestal Smart Trigger
3 Buttons / Battery & Assistance LED Indicators
Fork Rockshox Boxxer Select 29" 180mm
Charger RC / DebonAir / Tapered / Boost 20x110 / Maxle Stealth / Offset 46mm / Extl Rebound / Low Speed Compression / Gloss Black
Shock Rockshox Super Deluxe Select+ Coil
Metric 230x65mm / Debonair / Extl Rebound / 2 position compression / Custom tune / Spring rates: 300 lbs on S, 350 lbs on M, 400 lbs on L, 450 lbs on XL / Black
Headset Acros Integrated
ZS 56 Top / ZS 56 Bottom / Internal cable routing / Stainless steel bearings
Stem Forestal X PP Direct Mount DH
∅ 31.8mm / 7075 T6 Aluminum CNC / Black
Handlebar Forestal Oxydon C 780mm
∅ 31.8mm / Upsweep 4∅ / Backsweep 6∅ / Rise 15mm / Toray T700 & T800 Carbon
Grips Production Privée CR35
Forestal x Production Privée edition / 2-position adjustable (Tour / Race)
Seatpost Crankbrothers Highline 7
∅ 31.6mm / Length 125mm Size S / Length 150mm Sizes M, L / Length 170mm Size XL / Black ring / Aluminum 7076 T6
Dropper remote BikeYoke Triggy X
Custom Forestal w./ Shiftmix
Saddle Fizik Aidon X3 E-MTB
Fibre reinforced nylon / S-alloy rails / 249g / 255 x 145mm
Front Brake / Rotor Formula Cura 4 Carbon Polish 203mm
4-piston caliper / MixMaster / 6-Bolt Rotors
Rear Brake / Rotor Formula Cura 4 Carbon Polish 203mm
4-piston caliper / MixMaster / 6-Bolt Rotors
Cranks Praxis Carbon
Q-Factor 170mm / ISIS Drive / 104 BCD / Length 160mm Sizes S, M / Length 165mm Sizes L, XL
Chainring SRAM X-Sync 2 Eagle
32T, 104 BCD
Rear Derailleur SRAM GX
11 Speed / X-Actuation / Long cage / Colour: Black
UDH Derailleur hanger / Aluminum
Cassette SRAM PG-1130
10-42T / 11 Speed / Colour: Black
11 Speed / Powerlock / Colour: Grey
Shifter SRAM GX
11 Speed / X-Actuation / Colour: Black
Front Wheel Crankbrothers Synthesis Alloy 29" DH
Hub CB / 15 x 110mm Boost / Spokes Sapim E-Light / 6-Bolt / Inner Rim 31.5mm / Outter Rim 37.5mm
Rear Wheel Crankbrothers Synthesis Alloy 29" DH
Hub CB / 12 x 148mm Boost / Spokes Sapim Strong / XD Drivetrain/ 6-Bolt / Inner Rim 29.5mm / Outter Rim 36.5mm
Front Tyre Panaracer Romero 29 x 2.4 ST 3Comp.
Super Tough / Tubeless Ready / Triple Compound / Puncture resistant wall
Rear Tyre Panaracer Romero 29 x 2.4 ST 3Comp.
Super Tough / Tubeless Ready / Triple Compound / Puncture resistant wall



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