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Opus Pronghorn


What do you get when you harness leading-edge electric bike technology to plus-size tires, aggressive geometry and alloy components?
- The take-no-prisoners Pronghorn!

Powered by the new E-8000 Shimano STePS system, specially designed for trail use, the Pronghorn gets you anywhere you dare to go…and fast. So hang on and enjoy the adventure!

• New Shimano E-8000 STePS system
• E-bike specific fork and tires
• Stealth Dropper post and oversized handlebar

E-MTB system

E8000 E-MTB system for ultimate trail support with natural feel. Push your limits with more speed and confidence.


Your ticket to freedom

Experience freedom like never before. It’s simple really. Only a system designed specifically for mountain bikes can give you a truly new riding experience. With SHIMANO STEPS MTB, handling corners quickly and getting the front up for obstacles is a breeze. The system gives you more support for easy climbing. It’s lightweight for easy handling. And it levels the field for riders of all skill levels. It has greater support for higher cadence and still makes your ride feel completely natural. With this system, personal limitations are a thing of the past, experience ultimate freedom!
3 Drive Modes

The lightweight drive unit is controlled intuitively by a left-hand power mode switch with three settings (ECO, TRAIL and BOOST) for different types of terrain. The Shimano E8000 SERIES will give you that extra push.
Seamless shifting

Rain, snow, climbs: combined with Di2 the system ensures ergonomic, effective shifting without stress. It briefly reduces power as shifts are made, changing gear is astonishingly smooth. Based on cadence and speed, the SHIMANO STEPS MTB system automatically tells what gear to shift into.



Frame Meta 30 6061 Aluminum
Fork Suntour Aion-35 130mm Boost With Compression Damping And Rebound Control
Weight (lb) 44.88
Sizes S-M-L-XL
Color(s) Zinc Graphite
Shifters Shimano SLX 1 x 11
Front Derailleur N/A
Rear Derailleur Shimano SLX
Brakes Shimano M615 Hydraulic Disc
Brake Levers Shimano M615
Crank Shimano STePS
Chainrings 34
Bottom Bracket Shimano STePS
Cassette Shimano 11-42
Chain KMC X11
Headset FSA Orbit Integrated Sealed
Handlebar Zoom Tequila 780mm 35.0
Stem Zoom Tequila
Grips/Tape Velo Lightweight Silicone
Saddle Selle Italia Q-Bik
Seatpost Ks Lev E30I Dropper 31.6 w/ Remote
Wheels/Rims American Classic 3834 Boost
Hubs American Classic Boost 110/148
Tires Vittoria Bomboloni 27.5 x 3.0
Pedals VP-583 Flat
STePS E8000

Powerful SHIMANO STEPS motor is strong enough to handle the steepest of trails, yet intuitive enough to give you just the right amount of support every pedal stroke along the way.

• Designed specifically to give you that natural feel of riding a normal MTB.
• Weighs only 2.8kg, one of the lightest motors on the market.
• High power with max output of 70Nm (250W)
• Narrow Q-factor of 177mm (same Q-factor as current XT) provides an efficient pedal stroke
• Stable, smooth intuitive power for improved bike handling over every section of trail.
• Solidly supports speeds up to 32 km/h.


Lightweight yet rigid crankset for direct power transfer. Both crankset and rest of the drivetrain built on SHIMANO’s proven technology. This gives you reliability and confidence from first to last pedal stroke.

• Drivetrain components designed to work in sync with each other for unparalleled effectiveness and reliability.
• Spec’d with SHIMANO Hollowtech II bottom bracket for added strength and direct power transfer.
• E-MTB specific Deore XT crankset. Shorter 165 mm crank arm minimizes pedal strikes to maintain smooth cadence and motor assistance.
Switch Unit

The Firebolt Switch Unit control with intuitive operation is ergonomically designed for a MTB. It’s the ultimate in comfort and reliability as you switch between modes while blasting through the trails.

• The e-MTB Switch Unit (SW-E8000-L) is ergonomically designed for the specific demands of MTB riding such as riding through tight singletrack and bumpy terrain.
• Accurate, smooth shifting between power-assist modes regardless of weather or terrain conditions.
• Switch between Boost, Trail, Eco and Walk settings in a flash during the ride.
• Shifters incorporate the same design and shifting feel as XT Di2.
Computer Display

Extensive choice of power-assist settings to match your unique riding style. Compact, easy-to-read display with dynamic visuals when switching between support settings.

• Further personalize your support settings by choosing Dynamic, Explorer or Custom Mode to perfectly match your riding style and intended terrain.
• Computer specifically designed to be compact and durable for MTB riding.
• Easy-to-read LCD - each support setting assigned a unique colour.
• Sleek bar-mounted computer with dynamic LCD display shows gear number, power assist mode and battery range information.
• Wirelessly customise your preferences via Bluetooth.

Ultra-durable, powerful battery specially designed for the rigors of mountain biking.

• MTB-dedicated compact, low profile design for improved impact and vibration resistance.
• High capacity long-lasting Li-Ion battery of 504 Wh to cover more territory.
• Supported travel up to 100 km on one charge.
• 1,000 charge cycles with no significant power loss.
• Weatherproof and waterproof
• Quick charging time: 80% in 2.5 hours, from 0 to 100% in 5 hours

Power-assist mode and capacity / travel distance with estimated altitude meters (based on combined rider/bike weight of 100 kg (can vary depending on usage, rider profile, riding conditions, battery life):
• Boost: 50 km (400 hm)
• Trail: 75 km (600 hm)
• Eco: 100 km (800 hm)


  S M L XL
Riders's height  
± 5cm 163 170 178 185
± 2" 5'4" 5'7" 5'10" 6'1"
Size (cm)        
S - Seat tube (effective center-center in mm) 380 420 460 500
TT - top tube (effective center-center in mm) 560 575 595 620
HT - Head tube (mm) 110 110 120 130
HA - Head angle (mm) 69 69 69 69
SA - Seat angle (mm) 73 73 73 73
CS - Chain stay (mm) 450 450 450 450
D - BB drop (mm) 56 56 56 56
ST - Stack (mm) 617 617 626 636
RE - Reach (mm) 371 386 403 425
SO - Stand over (mm) 747 760 803 817
Handlebar width (mm) 780 780 780 780
Stem length (mm) 55 55 65 65
Crank length (mm) 175 175 175 175

Add to Cart:

  • SKU: OP-PRO27518
  • Manufactured by: Opus

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Specifications are subject to change without notice. We are doing our best to provide accurate and up to date product information and product images on our site but we cannot guarantee their absolute accuracy. Please contact the Store if in doubt.

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