Copperhead EVO AM 2026
How current the bike is — newer chassis, motor and battery score higher. 10 = brand-new, 0 = legacy.
The Copperhead EVO AM is Bulls' value-focused all-mountain line, built on a Carbon/Aluminium monocoque frame with 150 mm of rear travel from a 4-Link Swingarm. Every trim runs the Bosch Performance Line CX Gen 5 motor and the 800 Wh battery (the AM 1 ships at 600 Wh with an 800 Wh upgrade option), so the climbing power and range are consistent across the range; the differences are in the fork, drivetrain and finishing kit.
The four trims span EUR4,299 to EUR6,999. The AM 1 keeps costs down with a 140 mm Lytro air fork and an 11-speed Shimano Cues drivetrain. The AM 2 and AM 3 step up to a 150 mm RockShox Lyrik Select and 12-speed Shimano XT shifting, with the AM 3 adding a carbon bar and the higher-end TRP HD-M843 brakes. The AM 4 tops the line with a 160 mm Lyrik Ultimate, wireless SRAM XX1 Eagle AXS and a RockShox Reverb AXS dropper, which explains the jump to EUR6,999.
Geometry is shared across the platform and sits in moderate all-mountain territory: a 66 degree head angle, 76 degree effective seat angle and 445 mm chainstays at every size, with reach growing from 439 mm on the S to 497 mm on the XL. It is a balanced rather than aggressive set of numbers, matching the bike's stated brief of versatile trail and touring use over hard enduro riding. Note the AM 4 is offered only in M and L.
Geometry · hover a row to highlight the measurement on the bike
| S | M | L | XL | |
|---|---|---|---|---|
| Reach | 439 mm | 451 mm | 474 mm | 497 mm |
| Stack | 627 mm | 636 mm | 646 mm | 655 mm |
| Seattube | 400 mm | 430 mm | 470 mm | 510 mm |
| Chainstay | 445 mm | 445 mm | 445 mm | 445 mm |
| Headtube Angle | 66° | 66° | 66° | 66° |
| Seattube Angle (eff) | 76° | 76° | 76° | 76° |
| Wheelbase | 1204 mm | 1221 mm | 1248 mm | 1275 mm |
| Headtube | 110 mm | 120 mm | 130 mm | 140 mm |
| Front Centre | 759 mm* | 776 mm* | 803 mm* | 830 mm* |
Trims · 4
AM 1 | AM 2 | AM 3 | AM 4 | |
|---|---|---|---|---|
| Motor | Bosch Performance Line CX Gen 5 · 100 Nm · all trims | |||
| Battery | Bosch PowerTube 800 · 800 Wh · all trims | |||
| Travel F/R | 150/150 mm · all trims | |||
| Frame | Carbon / Aluminium · all trims | |||
| Fork | Lytro 34 Air Boost 2CR DS 15AH2-110, 140 mm | RockShox Lyrik Select RC, 1.8 Steerer, 150 mm | RockShox Lyrik Select RC, 1.8 Steerer, 150 mm | RockShox Lyrik Ultimate, 1.8 Steerer, 160 mm |
| Shock | RockShox Deluxe Select+ R, 150 mm | RockShox Deluxe Select+ RL, 150 mm | RockShox Deluxe Select+ RL, 150 mm | RockShox Deluxe Select+ RL, 150 mm |
| Headset | ACROS AZX-274, ZS56/28.6/ZS66/46 · all trims | |||
| Stem | RUMBLE Altimate | RUMBLE Altimate | — | — |
| Handlebar | RUMBLE Altimate 35 Riser | RUMBLE Altimate 35 Riser | RUMBLE Altimate PRO Carbon | RUMBLE Altimate PRO Carbon |
| Grips | ERGON GX10 · all trims | |||
| Saddle | BULLS MTB-Sport | SELLE ROYAL SRX | SELLE ROYAL SRX | prologo Proxim 400 wide |
| Seatpost | RUMBLE Escalator 34,9 mm dropper, 100 mm | RUMBLE Escalator 34,9mm dropper + SL-MT500-IL for I-spec EV, 100 mm | RUMBLE Escalator 34,9mm dropper + SL-MT500-L, 100 mm | RockShox Reverb AXS 34.9mm / 125mm with wireless remote |
| Brakes | SHIMANO BR-MT420 (front) / BR-MT410 (rear), hydraulic disc | TRP HD-M807, hydraulic disc | TRP HD-M843, hydraulic disc | TRP HD-M843, hydraulic disc |
| Rear derailleur | SHIMANO Cues RD-U6000 | SHIMANO Deore XT RD-M8100 shadow+ | SHIMANO Deore XT RD-M8100 shadow+ | SRAM XX1 Eagle AXS |
| Crank | SAMOX EC-53 · all trims | |||
| Shifters | SHIMANO Cues SL-U6000 | SHIMANO Deore XT SL-M8100, rapidfire+ | SHIMANO Deore XT SL-M8100, rapidfire+ | SRAM EC AXS Rocker |
| Cassette | SHIMANO CS-LG400-11 11-50T | SHIMANO Deore CS-M6100-12 10-51T | SHIMANO SLX CS-M7100-12 10-51T | SRAM XG-1295 Eagle 10-52T |
| Chain | SHIMANO Linkglide CN-LG500 | SHIMANO Deore CN-M6100 | SHIMANO SLX CN-M7100 | SRAM Eagle GX |
| Drivetrain | SHIMANO Cues RD-U6000; SAMOX EC-53; SHIMANO Cues SL-U6000; SHIMANO CS-LG400-11 11-50T; SHIMANO Linkglide CN-LG500 | SHIMANO Deore XT RD-M8100 shadow+; SAMOX EC-53; SHIMANO Deore XT SL-M8100, rapidfire+; SHIMANO Deore CS-M6100-12 10-51T; SHIMANO Deore CN-M6100 | SHIMANO Deore XT RD-M8100 shadow+; SAMOX EC-53; SHIMANO Deore XT SL-M8100, rapidfire+; SHIMANO SLX CS-M7100-12 10-51T; SHIMANO SLX CN-M7100 | SRAM XX1 Eagle AXS; SAMOX EC-53; SRAM EC AXS Rocker; SRAM XG-1295 Eagle 10-52T; SRAM Eagle GX |
| Wheels | BULLS DDM-30, Formula CL-811 front / FCL-548S rear hubs | RUMBLE Impeller 33 tubeless ready, Formula CL-811 front / FCL-548M rear hubs | RUMBLE Impeller PRO tubeless ready | RUMBLE Impeller PRO tubeless ready |
| Tyres | SCHWALBE Nobby Nic Evo 29 x 2,40 | SCHWALBE Magic Mary Performance 29 x 2,40 | SCHWALBE Magic Mary Performance 29 x 2,40 | SCHWALBE Magic Mary Performance 29 x 2,40 |
| Weight | 25.8 kg | 26.8 kg | 25.9 kg | 25.9 kg |
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