Descending
56
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 2022
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 750 · 750Wh
Travel F/R
150/150mm
Wheels
MX (29F / 27.5R)✎
Frame
Aluminium✎
Weight
27 kg
Price
From €3,799
EMTB Forums verdict
The Bulls Copperhead EVO AM is a discontinued 2022 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 air shock delivers 150 mm of travel front and rear, driven by Bosch's Smart System Performance Line CX motor (85 Nm) and a removable Bosch PowerTube battery, 400 Wh on the base AM 1 and 750 Wh on every '750' version. It runs a mullet wheel layout, 29 in front and 27.5 in rear, on all trims.
The range is value engineering on a shared 6061 alloy chassis. The base AM 1 (EUR3,799) keeps costs down with a 10-speed Shimano Deore drivetrain, Tektro brakes, a Bulls Lytro 34 air fork and a rigid post; the AM 1 750 adds the bigger 750 Wh battery; the AM 2 750 (EUR4,599) steps up to 11-speed Deore, Shimano brakes, a Limotec dropper and Schwalbe Nobby Nic tyres; and the flagship AM 3 750 (EUR5,099) gets a 12-speed Deore XT mech, the higher-end Bulls Lytro 35 Supreme fork, an SR Suntour Edge shock, four-piston brakes and aggressive Schwalbe Magic Mary / Hans Dampf Super Gravity tyres. A US-market AM 4 750 topped the line with an SR Suntour Durolux 36 fork and a Shimano XTR rear derailleur.
Geometry is moderate all-mountain for its era: a 66 degree head angle, 74 degree seat angle and 445 mm chainstays at every size, with reach running from 419 mm on the smallest 41 cm frame to 484 mm on the 54 cm. Comfort-oriented touches such as the ergonomic saddle and upright cockpit give it a touring lean, but the knobby MTB tyres, dropper post (on the 750 trims) and slack front end keep it firmly in trail territory.
Bulls discontinued the original Copperhead EVO AM after this generation. The Copperhead EVO AM badge later returned on a redesigned 29 in, Bosch CX Gen 5 platform for 2025 and 2026; the closest in-period all-mountain alternative in the Bulls catalogue was the Sonic 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
38
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
68
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 | 369 mm | 369 mm | 369 mm | 369 mm |
| Front Centre | 734 mm* | 754 mm* | 780 mm* | 806 mm* |
| FC:RC | 1.65 | 1.69 | 1.75 | 1.81 |
Trims · 5
AM 1 €3,799 | AM 1 750 €4,399 | AM 2 750 €4,599 | AM 3 750 €5,099 | AM 4 750 $5,999 | |
|---|---|---|---|---|---|
| Motor | Bosch Performance Line CX Gen 4 · 85 Nm · all trims | ||||
| Battery | Bosch PowerTube 750 · 750 Wh · all trims | ||||
| Travel F/R | 150/150 mm · all trims | ||||
| Frame | Aluminium · all trims | ||||
| Fork | BULLS Lytro 34 Air Boost RLR DS, 150 mm (air) | BULLS Lytro 34 Air Boost RLR DS, 150 mm (air) | BULLS Lytro 34 Air Boost RLR DS, 150 mm (air) | BULLS Lytro 35 SL Supreme LOR Air CTS Boost, 150 mm (air) | SR SUNTOUR Durolux 36 RC2 Boost, 150 mm |
| Shock | SR SUNTOUR Unair TR LO-R8, 150 mm | SR SUNTOUR Unair TR LO-R8, 150 mm | SR SUNTOUR Unair TR LO-R8-Z11, 150 mm | SR SUNTOUR Edge LOR8, 150 mm | SR SUNTOUR RS19 TRIAir 3CR, 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 | MTBi, CCS Slot Mount ready |
| Handlebar | BULLS MTB alloy, 760 mm, 25 mm rise, 9 degree backsweep, 31.8 mm clamp | BULLS MTB alloy, 760 mm, 25 mm rise, 9 degree backsweep, 31.8 mm clamp | BULLS MTB alloy | BULLS MTB alloy | BULLS MTB alloy, 760 mm, 25 mm rise, 9 degree backsweep, 31.8 mm clamp |
| Saddle | BULLS Sportive Ergo | BULLS Sportive Ergo | SELLE ROYAL Vivo Ergo | SELLE ROYAL Vivo Ergo | SELLE ROYAL Vivo Ergo |
| Seatpost | 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 | LIMOTEC A1-Z dropper post, 30.9 mm | LIMOTEC A1-Z dropper post, 30.9 mm |
| Brakes | Hydraulic disc brake; TEKTRO HD-M390 | Hydraulic disc brake; TEKTRO HD-M390 (203 mm front / 180 mm rear rotors) | Hydraulic disc brake; SHIMANO BR-MT420 | Hydraulic disc brake; SHIMANO Deore BR-M6120 (4-piston) front / 2-piston rear; 203/203 mm rotors | Hydraulic disc brake; SHIMANO BR-M6120 4-piston (front) / 2-piston (rear); 203 mm rotors front and rear |
| 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 | SHIMANO XTR RD-M9100-SGS |
| Crank | FSA 165mm | FSA 165mm | FSA 165mm | E-Thirteen 165 mm | E-Thirteen CR4USM-100 eSpec Direct Mount, 34T |
| 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) | SHIMANO CS-M6100 10-51T (12-speed) |
| Chain | KMC E10S | KMC E10S | KMC E11S | SHIMANO CN-M6100 | — |
| Drivetrain | SHIMANO Deore RD-M5120-SGS Shadow Plus; FSA 165mm; SHIMANO Deore SL-M4100-R; SHIMANO Deore CS-M4100-10 11-46T (10-speed); KMC E10S | SHIMANO Deore RD-M5120-SGS Shadow Plus; FSA 165mm; SHIMANO Deore SL-M4100-R; SHIMANO Deore CS-M4100-10 11-46T (10-speed); KMC E10S | SHIMANO Deore RD-M5100-SGS Shadow Plus; FSA 165mm; 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 | SHIMANO XTR RD-M9100-SGS; E-Thirteen CR4USM-100 eSpec Direct Mount, 34T; SHIMANO CS-M6100 10-51T (12-speed) |
| Wheels | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs); 29 in front / 27.5 in rear | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs); 29 in front / 27.5 in rear | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT400-B rear hubs); 29 in front / 27.5 in rear | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT510-B rear hubs); 29 in front / 27.5 in rear | RYDE Disc 30 (SHIMANO HB-MT400-B front / FH-MT510-B rear hubs); 29 in front / 27.5 in rear |
| Tyres | VeeTire Crown Gem (29 x 2.60 front / 27.5 x 2.60 rear) | VeeTire Crown Gem (29 x 2.60 front / 27.5 x 2.60 rear) | SCHWALBE Nobby Nic Performance | SCHWALBE Magic Mary Super Gravity (29 front) / Hans Dampf Super Gravity (27.5 rear) | SCHWALBE Magic Mary Super Gravity (29 x 2.60 front) / Big Betty (27.5 x 2.60 rear) |
| Weight | 27 kg | 27 kg | — | 27.2 kg | 27.1 kg |
| Price | €3,799 | €4,399 | €4,599 | €5,099 | $5,999 |
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