Bulls

Sonic 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.

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 / Full carbon

Weight

—

Price

—

View the Bulls Sonic EVO AM on Bulls’s site

Bulls Sonic EVO AM 2023

The 2023 Bulls Sonic EVO AM is the full-power, all-mountain end of the Sonic family: 150mm of travel front and rear, a mullet 29in front / 27.5in rear wheel mix, and a Bosch Performance Line CX motor giving 85Nm from a frame-integrated PowerTube battery (500Wh on the alloy AM 1, up to 750Wh on the carbon trims). It is not to be confused with the lighter Sonic EVO AM-SL models, which run Shimano EP-series drive units.The range climbs from the aluminium AM 1 on a SR Suntour fork and 10-speed Deore, through the carbon AM 2 on a BULLS Lytro air fork, to the RockShox-and-Shimano-XT-equipped AM 3 and AM 4, and on to the SRAM AXS-equipped AM-I. At the top, the AM Team is a race build with the Bosch CX Race motor, full RockShox Lyrik Ultimate suspension, SRAM XX1 Eagle AXS and an e*thirteen carbon wheel-and-crank package.Geometry is consistent across the carbon mullet frame: a 65.5-degree head angle, a 75-degree effective seat angle, 450mm chainstays on every size, and reach growing from 420mm in S to 490mm in XL. It is a modern but not extreme all-mountain stance.This is a discontinued 2023 model. Bulls carried the Sonic EVO AM forward into 2024 (the current sibling in this database), so spares and a like-for-like successor remain available.

EMTB Forums verdict

The 2023 Bulls Sonic EVO AM is the full-power, all-mountain end of the Sonic family: 150mm of travel front and rear, a mullet 29in front / 27.5in rear wheel mix, and a Bosch Performance Line CX motor giving 85Nm from a frame-integrated PowerTube battery (500Wh on the alloy AM 1, up to 750Wh on the carbon trims). It is not to be confused with the lighter Sonic EVO AM-SL models, which run Shimano EP-series drive units.

The range climbs from the aluminium AM 1 on a SR Suntour fork and 10-speed Deore, through the carbon AM 2 on a BULLS Lytro air fork, to the RockShox-and-Shimano-XT-equipped AM 3 and AM 4, and on to the SRAM AXS-equipped AM-I. At the top, the AM Team is a race build with the Bosch CX Race motor, full RockShox Lyrik Ultimate suspension, SRAM XX1 Eagle AXS and an e*thirteen carbon wheel-and-crank package.

Geometry is consistent across the carbon mullet frame: a 65.5-degree head angle, a 75-degree effective seat angle, 450mm chainstays on every size, and reach growing from 420mm in S to 490mm in XL. It is a modern but not extreme all-mountain stance.

This is a discontinued 2023 model. Bulls carried the Sonic EVO AM forward into 2024 (the current sibling in this database), so spares and a like-for-like successor remain available.

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

Descending

A solid all-round descender (65.5° head angle, 150mm) — capable in the rough and steep without being an all-out bruiser.

Playfulness

A fair bit of pop, but happiest on flowing trail rather than trials moves.

Size balance

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

Climbs well — a 75° seat keeps the front planted. 600W of peak power and 85Nm of torque — a strong full-power motor.

Best suited toAll-round trail riding across mixed terrain.

No single standout trait — a balanced, versatile bike.

Watch out forNo major red flags in the L geometry.

The numbers are well balanced for its category.

How it stacks up vs other Full Power · Trail bikes (from 227 bikes in the database)

Battery750 Whabout average capacity

Motor torque85 Nm13 Nm below average

Computed from geometry + spec, not a paid review. Scores are guidance, not gospel.

Paste into any thread to embed this live, interactive panel.

Geometry · hover a row to highlight the measurement on the bike

	S	M	L	XL
Reach	420 mm	450 mm	470 mm	490 mm
Stack	632 mm	632 mm	630 mm	640 mm
Seattube	410 mm	440 mm	470 mm	510 mm
Chainstay	450 mm	450 mm	450 mm	450 mm
Headtube Angle	65.5°	65.5°	65.5°	65.5°
Seattube Angle (eff)	75°	75°	75°	75°
Wheelbase	1193 mm	1218 mm	1238 mm	1269 mm
Headtube	120 mm	110 mm	120 mm	130 mm
Front Centre	743 mm*	768 mm*	788 mm*	819 mm*
FC:RC	1.65	1.71	1.75	1.82

Trims · 6

	1	2	3	4	I	Team
Motor	Bosch Performance Line CX Gen 4 · 85 Nm	Bosch Performance Line CX Gen 4 · 85 Nm	Bosch Performance Line CX Gen 4 · 85 Nm	Bosch Performance Line CX Gen 4 · 85 Nm	Bosch Performance Line CX Gen 4 · 85 Nm	Bosch Performance Line CX-R · 85 Nm
Battery	Bosch PowerTube 750 · 750 Wh · all trims
Travel F/R	150/150 mm · all trims
Frame	Aluminium	Carbon	Carbon	Carbon	Carbon	Carbon
Fork	BULLS Lytro 34 LOR 1.8 tapered	BULLS Lytro 35 Supreme LOR Air 1.8 tapered	RockShox 35 Gold RL 1.8 29”	RockShox Lyric Select Charger RC 1.8 29”	RockShox Lyrik Ultimate Charger 2.1 RC2 1.8 29”	RockShox Lyrik Ultimate RC2, 1.8 Steerer
Shock	SR SUNTOUR Edge Plus R	SR SUNTOUR Edge LOR8	RockShox Deluxe RT Select+	RockShox Deluxe RT Select+	RockShox Deluxe RT Select+	RockShox Super Deluxe Select+ RT
Headset	ACROS no.1 1.8 tapered	ACROS no.1 1.8 tapered	ACROS no.1 1.8 tapered	ACROS no.1 1.8 tapered	ACROS no.4 1.8 tapered	acros AZX-262 310.52.570R1
Stem	BULLS MTB 35mm, internal cable routing	BULLS MTB 35mm, internal cable routing	BULLS MTB 35mm, internal cable routing	BULLS MTB 35mm, internal cable routing	BULLS MTB 35mm, internal cable routing	MTB-SLS, CCS Slot Mount ready
Handlebar	BULLS riserbar	BULLS riserbar	BULLS riserbar	BULLS riserbar	BULLS Carbon Riser Bar	BULLS Enduro Carbon
Saddle	prologo Proxim 400 wide	prologo Proxim 400	prologo Proxim 400	prologo Proxim 450 Sport	prologo Proxim 450 Sport	prologo W850 Carbon
Seatpost	LIMOTEC Alpha 1	LIMOTEC Alpha 1	LIMOTEC Alpha 1	LIMOTEC Alpha 1	8PINS NGS	eightpins Dropper Post
Brakes	Hydraulic Disc Brake · all trims
Rear derailleur	SHIMANO Deore RD-M5120	SHIMANO Deore RD-M5100	SHIMANO XT RD-M8100	SHIMANO XT RD-M8100	SRAM GX AXS	SRAM XX1 Eagle AXS
Crank	SAMOX	SAMOX	E-Thirteen	E-Thirteen	E-Thirteen	e*thirteen Carbon
Shifters	—	SHIMANO Deore SL-M5100	SHIMANO Deore M6100 I-SPEC EV	SHIMANO Deore XT SL-M8100	SRAM AXS	SRAM EC AXS Rocker
Cassette	SHIMANO Deore CS-M4100-10 11-46T	SHIMANO Deore CS-M5100-11 11-51T	SHIMANO CS-M6100-12 10-51T	SHIMANO SLX CS-M7100-12 10-51T	SRAM XG 1275 10-52T	SRAM XG-1299 Eagle 12-speed 10-52T
Chain	—	—	—	—	—	SRAM XX1 Eagle
Drivetrain	SHIMANO Deore RD-M5120; SAMOX; SHIMANO Deore CS-M4100-10 11-46T	SHIMANO Deore RD-M5100; SAMOX; SHIMANO Deore SL-M5100; SHIMANO Deore CS-M5100-11 11-51T	SHIMANO XT RD-M8100; E-Thirteen; SHIMANO Deore M6100 I-SPEC EV; SHIMANO CS-M6100-12 10-51T	SHIMANO XT RD-M8100; E-Thirteen; SHIMANO Deore XT SL-M8100; SHIMANO SLX CS-M7100-12 10-51T	SRAM GX AXS; E-Thirteen; SRAM AXS; SRAM XG 1275 10-52T	SRAM XX1 Eagle AXS; e*thirteen Carbon; SRAM EC AXS Rocker; SRAM XG-1299 Eagle 12-speed 10-52T; SRAM XX1 Eagle
Wheels	RODI Tryp30, Hohlkammer	RODI Tryp30, Hohlkammer	SHIMANO WH-MT620	DT SWISS H 1900 Spline	DT SWISS HXC 1501 Spline Carbon	e*thirteen TRS Race Carbon
Tyres	SCHWALBE Magic Mary Performance Soft Grip / Hans Dampf Performance Speed Grip	SCHWALBE Magic Mary Performance Soft Grip / Hans Dampf Performance Speed Grip	SCHWALBE Magic Mary Performance Soft Grip / Hans Dampf Performance Speed Grip	SCHWALBE Magic Mary Evolution Super Trail / Big Betty Evolution Super Trail	SCHWALBE Magic Mary Evolution Super Trail / Big Betty Evolution Super Trail	SCHWALBE Magic Mary Evo Super Trail TLE Addix Soft / Magic Mary Evo Super Gravity TLE Soft

Rides similarly

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