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COPPERHEAD EVO HD 750 DIAMOND

Name: COPPERHEAD EVO HD 750 DIAMOND
Brand: BULLS
SKU: 650-21741
Price: 2599.0 USD
Availability: InStock

Heavy duty and reliable. With a Shimano drivetrain and a load limit of 330 lbs., the Copperhead HD is a workhorse of a hardtail eMTB built to handle tough rides.

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$2,599.00 ~~$4,499.00~~ Save $1,900

Frame Size

WHAT IS MY FRAME SIZE?
Frame	Height	Inseam
41(CM)	5'5" to 5’9”	30" to 32”
44(CM)	5'9" to 5’11”	32" to 34”
48(CM)	5’11" to 6'3"	34” to 36”
54(CM)	6’3" to 6’8"	36” to 38”

These frame size recommendations are only to be used as a reference. Please contact us if you have any questions.

Color

5-Year Frame Warranty

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FEATURES

COPPERHEAD EVO HD 750 DIAMOND

THE GREAT EQUALIZER, THE COPPERHEAD EVO HD DIAMOND 750 IS THE MOST ACCESSIBLE EMTB AVAILABLE.

The BULLS Copperhead EVO HD 750 Diamond is a high-performance electric mountain bike built for riders seeking confidence and comfort on rugged terrain. Here’s a detailed look at what makes this eMTB so capable:

Motor and Battery

Motor: Bosch Performance Line CX motor with 85Nm of torque for responsive and powerful pedal-assist on climbs and trails.
Battery: Bosch PowerTube 750Wh battery, fully integrated into the frame for a clean look. Charging time: approx. 6 hours.

Suspension and Frame

Fork: BULLS Lytro 35 Supreme SL Boost fork with 120mm travel for smooth control on bumpy terrain.
Frame: Durable 6061 aluminum with internal cable routing. Available sizes: 41 / 44 / 48 / 54 cm.

Drivetrain and Brakes

Gears: Shimano Deore 10-speed drivetrain for smooth, versatile shifting.
Brakes: Tektro HD-M530 hydraulic disc brakes with 203mm front / 180mm rear rotors for confident stopping power.

Wheels and Tires

Wheels: 27.5" wheels offering a great mix of agility and stability.
Tires: Schwalbe Smart Sam 27.5" x 2.6" tires with excellent grip for all-terrain performance.

Additional Features

Remote: BOSCH LED remote with Bluetooth connectivity to your smartphone. Displays battery level in a compact, easy-to-use format.
Pedals and Saddle: BULLS MTB pedals and Zecure MTB saddle for durability and comfort.

Technology and Design

MonkeyLink Ready: Integrated mounts for lights, fenders, and more—snap on and ride.
Class-1 eBike: Pedal-assist up to 20 mph, trail-legal and fun-ready.

The Copperhead EVO HD 750 Diamond is perfect for riders seeking an accessible yet powerful eMTB that’s equally at home on weekend trail adventures and weekday fitness rides.

DriveUnit: Bosch CX Smart System
Battery: Bosch PowerTube 750 Wh Smart System
Charger: Bosch Smart System 4A
Charging time: 6 hours
Display: Bosch LCD Remote
Frame: Aluminum 6061
Fork: BULLS Lytro 35 Supreme SL Air Boost, 29, 120 mm
RearShock:
Derailleur: Shimano Deore RD-M5120-SGS
Gears: 10-speed
Crankset: FSA Eco Steel Boost Spider #W0147, 38T

Cassette: Shimano CS-M4100-10, 11-46T
Brakes: Tektro HD-M530/530 hydraulic disc, 203/180 mm
Handlebar: ZECURE MTB Alloy, Dia 31.8 mm, 740 mm, 25 mm raise, 9° back swept
Stem: BULLS MTB internal cable
Seatpost: ZECURE Alloy 30.9 x 350 mm
Seat: ZECURE MTB
Hubs: Formula CL-811/CL2241
Rims: Ryde Disc 30
Tires: Schwalbe Smart Sam K-Guard 65-584, 27.5 x 2.60
Pedals: ZECURE MTB
Weight: 55.8 lbs.

* Specifications subject to change without notice

Frame Size		41(CM)	44(CM)	48(CM)	54(CM)
Seat Tube Length	A	410mm	440mm	480mm	540mm
Top Tube Length	B	615mm	620mm	635mm	660mm
Chain Stay Length	C	440mm	440mm	440mm	440mm
Bottom Bracket Offset	D	60mm	60mm	60mm	60mm
Head Tube Length	E	125mm	125mm	130mm	140mm
Head Tube Angle	α	66°	66°	66°	66°
Seat Tube Angle	β	74.5°	74.5°	74°	74°
Standover Height		780mm	795mm	820mm	860mm
Wheelbase		1165mm	1190mm	1196mm	1223mm
Reach		438mm	443mm	451mm	473mm
Stack		638mm	638mm	642mm	652mm

Bosch Performance CX Smart System Motor

The Bosch Performance Line CX Smart System is like having a mountain goat in your frame—strong, smart, and built for steep climbs. With up to 85 Nm of torque, it gives you serious kick when you need it most. It’s perfect for trails, hills, and anything in between. This motor doesn’t just push—it thinks. It syncs with your eBike’s system for smooth updates, custom riding modes via the Flow app, and even a Smart Walk Assist to help you hike the bike uphill. Need to stop on a slope? The Hill Hold has your back. And when it’s parked, the eBike Lock uses your phone as a digital key—no keychain jingle required. In short: Power, brains, and zero drama. Just pure eBike fun.

Bosch Remote Smart System Display

The Bosch LED Remote puts eBike control right at your fingertips. With a smart, ergonomic design, it connects to the eBike Flow app, letting you monitor battery, speed, and ride modes—all without taking your hands off the handlebars. Its adaptive LED brightness keeps visibility sharp, and features like Smart Walk Assist and Hill Hold help tackle steep terrain. Plus, eBike Lock turns your phone into a digital key for added security.

Bosch PowerTube 750 Smart System Battery

The Bosch PowerTube 750 packs 750Wh of energy for longer, more demanding rides, delivering 20% more range than the PowerTube 625 while keeping a sleek, integrated design. Available in horizontal or vertical mounting, it balances power with lightweight handling. Its advanced Battery Management System (BMS) ensures safe, efficient performance, protecting against overheating and deep discharge. Charge to 50% in 2 hours, full in 6 with the 4A charger. Plus, Smart System compatibility allows over-the-air updates and custom ride settings.

Dad Bike Extraordinaire: The Copperhead EVO HD

The Copperhead EVO HD has become my go-to bike, easily logging more miles than any other in my fleet. It's the ultimate 'dad bike,' effortlessly carrying my five-year-old on countless adventures. The generous cargo capacity and comfortable geometry makes it a joy to ride.

This e-bike truly excels on climbs. The long range and powerful motor assist have allowed me to tackle challenging ascents that would be impossible otherwise.

The Copperhead EVO HD is incredibly durable and built to last. The suspension system provides a smooth ride over rough terrain, and the robust tires offer excellent traction. The powerful motor assist in Eco mode provides a gentle boost, while the Sport mode delivers exhilarating power on steeper inclines.

Ultimately, the Copperhead EVO HD is an exceptional e-bike that excels in both performance and practicality. Its versatility, durability, and powerful motor make it an ideal companion for families seeking adventure. I highly recommend this bike to any parent seeking an adventure-ready e-bike that can handle anything.

The best value eMTB on the market

I've been riding and testing various hub motor and mid-drive eBikes and the Copperhead EVO HD750 is easily the best value hardtail eMTB. The Bosch Smart System is the best motor/battery system for e-bikes I've used. Plus, I like that the batteries are UL tested. Bulls spec'd this bike to be an ultimate eBikepacking monster, with the 330LB weight limit which is great for me being a 290lb guy. Even with my heavy weight I completed a 40 mile 4000ft+ ride with 10% battery remaining. I love it!!