Descending
57
A solid all-round descender (66° head angle, 150mm) — capable in the rough and steep without being an all-out bruiser.
Bulls
Copperhead EVO AM 2023
Discontinued✎Full Power · TrailLegacy · 1/10iFreshness 1/10
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.
Motor
Bosch Performance Line CX Gen 4 · 85Nm · 600W↗
Battery
Bosch PowerTube Horizontal (500Wh base / 750Wh on '750' trims)
Travel F/R
150/150mm
Wheels
27.5F / 27.5R✎
Frame
Aluminium✎
Weight
27 kg
Price
From €3,999
EMTB Forums verdict
The Bulls Copperhead EVO AM is a discontinued 2023 all-mountain e-MTB and, despite carrying the Copperhead name that Bulls otherwise uses for its hardtails, it is genuinely full suspension. A four-bar rear linkage with an SR Suntour shock gives 140 mm of travel front and rear on the AM 1 and AM 2, rising to 150 mm on the AM 3, all driven by Bosch's Smart System Performance Line CX motor (85 Nm) and a removable Bosch PowerTube battery, 500 Wh on the base AM 1 and 750 Wh on the '750' versions.
The trim ladder is value engineering on a shared alloy chassis. The AM 1 runs a 10-speed Shimano Deore drivetrain, Tektro brakes, an SR Suntour Unair fork and a rigid post; the AM 2 750 steps up to 11-speed Deore, Shimano brakes, a Limotec dropper and Schwalbe Nobby Nic tyres; and the flagship AM 3 750 gets a 12-speed Deore XT mech, a 150 mm Bulls Lytro 35 Supreme fork, an SR Suntour Edge shock and aggressive Schwalbe Magic Mary / Hans Dampf Super Gravity tyres. Geometry is moderately slack for its era at a 66 degree head angle, with reach running from 419 mm on the smallest 41 cm frame to 484 mm on the 54 cm, and 445 mm chainstays throughout.
Bulls discontinued the Copperhead EVO AM after 2023; within the current Bulls line-up the closest equivalent is the all-mountain Vuca EVO AM range.
Geometry read
What the numbers mean on the trail
Computed from this bike's geometry, spec and build kit — reach, wheelbase, chainstay, head and seat angles, travel, motor, weight and the fork/tyre/brake spec — and worked out per size, because a fixed chainstay can make an S and an XL feel very different.
Size
Setting
Playfulness
37
More planted than poppy — better on steep terrain than tight, fiddly singletrack.
Size balance
94
Rear-long with a planted front in L (FC:RC 1.75) — easy to weight the front and quick to turn, though it can feel light at the back at real speed.
Technical climbing
69
Climbs well — a 74° seat keeps the front planted. 600W of peak power and 85Nm of torque — a strong full-power motor.
No single standout trait — a balanced, versatile bike.
Brilliant on fast, rough, steep terrain; less fun on tight, mellow trails.
How it stacks up vs other Full Power · Trail bikes (from 245 bikes in the database)
Weight27 kg4.0 kg heavier than average
Battery750 Whabout average capacity
Motor torque85 Nm13 Nm below average
Computed from geometry + spec, not a paid review. Scores are guidance, not gospel.
Geometry · hover a row to highlight the measurement on the bike
| S | M | L | XL | |
|---|---|---|---|---|
| Reach | 419 mm | 439 mm | 462 mm | 484 mm |
| Stack | 612 mm | 612 mm | 621 mm | 630 mm |
| Seattube | 410 mm | 440 mm | 480 mm | 540 mm |
| Chainstay | 445 mm | 445 mm | 445 mm | 445 mm |
| Headtube Angle | 66° | 66° | 66° | 66° |
| Seattube Angle (eff) | 74° | 74° | 74° | 74° |
| Wheelbase | 1179 mm | 1199 mm | 1225 mm | 1251 mm |
| Headtube | 120 mm | 120 mm | 130 mm | 140 mm |
| BB Height | 350 mm | 350 mm | 350 mm | 350 mm |
| Front Centre | 734 mm* | 754 mm* | 780 mm* | 806 mm* |
| FC:RC | 1.65 | 1.69 | 1.75 | 1.81 |
Trims · 4
AM 1 €3,999 | AM 1 750 €4,399 | AM 2 750 €4,599 | AM 3 750 €5,099 | |
|---|---|---|---|---|
| Motor | Bosch Performance Line CX Gen 4 · 85 Nm · all trims | |||
| Battery | Bosch PowerTube Horizontal (500Wh base / 750Wh on '750' trims) · 750 Wh · all trims | |||
| Travel F/R | 150/150 mm · all trims | |||
| Frame | Aluminium · all trims | |||
| Fork | BULLS Lytro 34 Air Boost RLR DS, 140 mm (air) | BULLS Lytro 34 Air Boost RLR DS, 140 mm (air) | BULLS Lytro 34 Air Boost RLR DS, 140 mm (air) | BULLS Lytro 35 SL Supreme LOR Air CTS Boost, 150 mm (air) |
| Shock | SR SUNTOUR Unair TR LO-R8, 140 mm | SR SUNTOUR Unair TR LO-R8, 140 mm | SR SUNTOUR Unair TR LO-R8-Z11, 140 mm | SR SUNTOUR Edge LOR8, 150 mm |
| Headset | FSA No.57SC | FSA No.57SC | FSA No.55R | FSA No.55R |
| Stem | MTB-SL, CCS Slot Mount ready | MTB-SL, CCS Slot Mount ready | MTBi, CCS Slot Mount ready | MTBi, CCS Slot Mount ready |
| Handlebar | BULLS MTB alloy · all trims | |||
| Saddle | BULLS Sportive Ergo | BULLS Sportive Ergo | SELLE ROYAL Vivo Ergo | SELLE ROYAL Vivo Ergo |
| Seatpost | BULLS alloy 30.9, 350 mm (rigid - non-dropper) | BULLS alloy 30.9, 350 mm (rigid - non-dropper) | LIMOTEC A1-Z dropper post, 30.9 mm | LIMOTEC A1-Z dropper post, 30.9 mm |
| Brakes | Hydraulic disc brake; TEKTRO HD-M390 levers | Hydraulic disc brake; TEKTRO HD-M390 levers | Hydraulic disc brake; SHIMANO BL-MT4100 levers | Hydraulic disc brake; SHIMANO BL-M6100 levers |
| Rear derailleur | SHIMANO Deore RD-M5120-SGS Shadow Plus | SHIMANO Deore RD-M5120-SGS Shadow Plus | SHIMANO Deore RD-M5100-SGS Shadow Plus | SHIMANO Deore XT RD-M8100-12-SGS Shadow Plus |
| Crank | FSA 165 mm | FSA 165 mm | FSA 165 mm | E-Thirteen 165 mm |
| Shifters | SHIMANO Deore SL-M4100-R | SHIMANO Deore SL-M4100-R | SHIMANO Deore SL-M5100-IR I-Spec EV | SHIMANO Deore XT SL-M6100-IR I-Spec EV |
| Cassette | SHIMANO Deore CS-M4100-10 11-46T (10-speed) | SHIMANO Deore CS-M4100-10 11-46T (10-speed) | SHIMANO Deore CS-M5100-11 11-51T (11-speed) | SHIMANO Deore CS-M6100-12 10-51T (12-speed) |
| Chain | KMC E10S | KMC E10S | KMC E11S | SHIMANO CN-M6100 |
| Drivetrain | SHIMANO Deore RD-M5120-SGS Shadow Plus; FSA 165 mm; SHIMANO Deore SL-M4100-R; SHIMANO Deore CS-M4100-10 11-46T (10-speed); KMC E10S | SHIMANO Deore RD-M5120-SGS Shadow Plus; FSA 165 mm; SHIMANO Deore SL-M4100-R; SHIMANO Deore CS-M4100-10 11-46T (10-speed); KMC E10S | SHIMANO Deore RD-M5100-SGS Shadow Plus; FSA 165 mm; SHIMANO Deore SL-M5100-IR I-Spec EV; SHIMANO Deore CS-M5100-11 11-51T (11-speed); KMC E11S | SHIMANO Deore XT RD-M8100-12-SGS Shadow Plus; E-Thirteen 165 mm; SHIMANO Deore XT SL-M6100-IR I-Spec EV; SHIMANO Deore CS-M6100-12 10-51T (12-speed); SHIMANO CN-M6100 |
| Wheels | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs) | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs) | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs) | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT510-B rear hubs) |
| Tyres | VeeTire Crown Gem | VeeTire Crown Gem | SCHWALBE Nobby Nic Performance | SCHWALBE Magic Mary Super Gravity (front) / Hans Dampf Super Gravity (rear) |
| Weight | 27 kg | 27 kg | — | — |
| Price | €3,999 | €4,399 | €4,599 | €5,099 |
Rides similarly
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