Bulls Copperhead EVO AM 3 Review | Did It Hit The Bullseye?

Most eMTBs come with a fairly minimal display mounted in the top tube. The Bulls Copperhead EVO AM 3 750 is no different. There are LEDs that indicate assistance level as well as battery charge level. I’d prefer a readout that gave battery charge level as a percentage, so that I could have a more exact fix on my remaining range. My preference isn’t shared by everyone, though. I know riders who are happy to have something more minimal so that the display doesn’t distract them while riding.

Because this is a Bosch-equipped eMTB, it connects to the Bosch Flow e-bike app via Bluetooth connectivity. With the app riders can adjust a variety of performance parameters. Riders can adjust the assistance level as a percentage, power delivery and cutoff speed.

The app provides a number of other features, including the ability to log and track your rides, which is very handy for anyone with specific fitness goals. It’s always nice to see that average speed number climb. It will even tell you how much distance you covered in each assistance mode; if you’re trying to get stronger, this will demonstrate more time spent in Eco and less time spent in Turbo.

The Flow app can also function as a display for someone who wants to see more data as they ride. That can be helpful when riding on the road or less technical offroad terrain, but on technical trails where falling can happen, we wouldn’t recommend using your phone in that way.

We were excited to see how the Bulls Copperhead EVO AM 3 750 would perform on our range test due to its 750Wh battery. As we mentioned before, our rule of thumb is that we like to see a battery’s capacity at least equal the motor’s output, and with this eMTB, the battery is triple the motor size.

We expect a combination like this to yield between two and five hours of riding and our range test fit with this. Our tester Bryce took the Bulls Copperhead EVO AM 3 750 for a range test in Turbo mode and his results were impressive. Bryce covered 31 mi. with 3115 ft. of climbing at an average speed of 13.7 mph over 2:16 of ride time.

This is a really solid result, and in a way it is all the more impressive because this isn’t an especially light eMTB due to the big battery and aluminum frame; it weighs just a nick shy of 60 lbs., at 59.9 lbs.

Based on Bryce’s results, we expect that in Eco mode, most riders would get at least four hours of riding, but for many, more like five hours of trail time.

One of the things about the Bosch Performance Line CX motor that Bryce commented on was how it didn’t reduce power output as it neared the last of the battery’s charge. It continued to put out full power until the last couple hundred yards, at which point it dialed back output, as if it was hoping the parking lot was around the next bend.

With eMTBs such as the Bulls Copperhead EVO AM 3 750 we perform two different hill tests in order to accurately assess their hill-climbing abilities. For the first test, Justin took the Copperhead EVO AM 3 750 to Hell Hole, our ⅓ mile, 12 percent climb that we subject all our test bikes to.

In this first test, Justin finished the climb in a time of 1:39, for an average of 11 mph. That’s 10 seconds slower than the Orbea Wild made the climb.

Justin then took the Bulls Copperhead EVO AM 3 750 up the Water Tour double track climb. This climb is unpaved and a bit more technical, and not as steep as Hell Hole. Justin’s time up the Water Tower climb came in at 3:40, which is just 5 seconds slower than the Orbea Wild. What this shows is that the greater weight of the Bulls Copperhead EVO AM 3 750 (in part, due to the aluminum frame), grows in noticeability as the hills grow steeper. The flatter the terrain, the less noticeable the difference is.

I’m going to summarize comments I got from Bryce and the rest of the testing team here at Electric Bike Report, which were, overall, very favorable. Bryce noted that the Bulls Copperhead EVO AM 3 750 enjoyed great handling and when moving, the eMTB felt lighter than it actually is. The one real exception to this was any time his speed rose above 20 mph and the motor cut off. Trying to pedal the full weight of the Copperhead EVO AM 3 750 reminded him just how much this e-bike weighs.

Because the Bulls Copperhead EVO AM 3 750 is equipped with a Bosch Performance Line CX motor, we experienced that same punchiness on steep uphills that we’ve come to appreciate on other eMTBs equipped with this motor. The handling is natural enough that it carves nice lines on flowy singletrack with no fighting the weight of the eMTB.

One of our few criticisms of this e-bike was their choice of dropper post. The Limotec A1-Z works well enough, but Bulls chose to spec a single length of post, 125mm. This ensures it is not too long for the small frame size, but normally, as frame size increases, the length of the dropper does as well; at just 125mm, we were wishing for more length when negotiating steeps and drops.

This is a terrific full-suspension eMTB, one that anyone looking to keep their investment reasonable should be satisfied with. It carries a retail price just north of $5,500, and that’s a fair price for this e-bike. If an opportunity presents itself to pick one up at a discount, this would be a very compelling buy.

Had we published this review some months back, we would have come away impressed and reporting that this is a great, cost-effective eMTB that’s worth a look by anyone who needs to stay within a sane budget. There are plenty of reasons to like the Bulls Copperhead EVO AM 3 750. That said, they reduced this eMTB’s price from $5,500 to less than $4000, taking it from a smart buy to a steal (not literally, thank heaven).

Not only is the Copperhead EVO AM 3 750 a terrific value these days, it will continue to be a great eMTB for some time to come. Any time you buy an e-bike, you are locked into the frame, the motor and the battery. Everything else—fork, shock, drivetrain, brakes, wheels, dropper post and especially tires—can be upgraded. For that reason, it’s important to invest in an eMTB that can grow with you, which is precisely what Bulls has built with the Copperhead EVO AM 3 750. The Bosch Performance Line CX is one of the best motors being spec’d in eMTBs, and it would be hard, if not impossible, to find a better motor in an eMTB at this price. Add to that the sizable 750Wh battery and a durable aluminum frame with 150mm of travel and a mullet setup, and you have an eMTB that is very contemporary.

Those are elements on which a very nice eMTB can be built. Because Bulls chose Shimano Deore components in the drivetrain and brakes and because they are arguably the most affordable components that can stand up to the demands placed on an eMTB, what we have is an eMTB with a relatively low initial investment, but with enough underlying quality that later upgrades make good sense. When we consider the difference between Shimano’s Deore and Deore XT groups, the single biggest difference between the two is durability; the Deore parts won’t last as long as the Deore XT parts, so for the rider who needs to keep their spend down but plans to ride plenty, they can begin upgrading parts as they wear out a year or two down the line.

Our criticisms of the Bulls Copperhead EVO AM 3 750 are relatively minor. An eMTB this capable should have dropper posts matched to frame sizes; the bigger the frame, the greater the length the dropper should be.

Our other criticism of the Bulls Copperhead EVO AM 3 750 is its weight. At 59.9 lbs., it is one of the heaviest eMTBs we’ve tested. Its weight won’t be an issue for most riders in most circumstances, but if riding in a group, a rider on this eMTB may find it difficult to keep up on steeper climbs. We have a responsibility to note that this is a heavy eMTB, but it’s heavy because they have made choices that will make for a lasting investment.

The Bulls Copperhead EVO AM 3 750’s weight is a function of the aluminum frame, big battery and components chosen. The frame and battery can’t be changed, but if someone chooses to upgrade the components, maybe replace the wheels, pounds can be shaved from this eMTB. You can’t change handling, the motor or the suspension design. The Copperhead EVO AM 3 750 performs well in each of those regards.

Can someone maybe do something about these names that are as long as the title of an English Duke? We don’t think these long names do anything to help the consumer’s understanding of the product and they make it more difficult to differentiate between the different models on their site. We’d also like to see Bulls begin to import their carbon fiber eMTBs to the U.S. market, but that’s not a criticism of this e-bike.

Bulls did a great job of designing an affordable eMTB that will be worth keeping (and riding) for years to come.

Happy Riding! Make sure to let us know if you have any questions or if you think we left anything out in this review of the Bulls Copperhead EVO AM 3 750 down in our comments section.