With the all-new Sonic platform featuring a distinctive design and a host of exciting features, BULLS are entering an entirely new chapter. We found out whether the elegant BULLS SONIC EVO AM 6 Carbon is capable of more on the trail than just looking good.

Click here for an overview of the best eMTB 2020 group test.

BULLS SONIC EVO AM 6 Carbon | Bosch Performance Line CX/625 Wh | 150/150 mm (f/r) | 23.06 kg (size M)
€ 7,399 | manfacturer website

Black is the new black. The BULLS SONIC EVO AM 6 Carbon with its striking shape and beautifully integrated Bosch Performance CX motor has a svelte black look looks good just standing there. With a carbon frame and internal 625 Wh battery, the Sonic tops the scales at 23.06 kg. The battery is very easy to remove by pulling it up and to the left. Customers could alternatively choose either a 400 Wh or 500 Wh battery and save a few hundred Euros. This makes sense if you’re very light, know that you’re only going to use the lower support levels or don’t plan on riding far. The disadvantage here is that the battery mount is designed for the large battery and if you fit one of the smaller batteries it shifts the centre of gravity upwards unnecessarily. Nevertheless, the € 7,399 SONIC offers numerous smart features such as clean cable routing, the MonkeyLink bracket for lights that are powered by the ebike battery and a special Kiox mount. Regarding componentry, the BULLS is specced with reliable and powerful MAGURA MT7 brakes with a 220 mm rotor at the front and an integrated EightPins dropper post offering up to 228 mm travel.

Components, weight and technical details of the BULLS SONIC EVO AM 6 Carbon

A stand out feature is the 150 mm travel RockShox suspension consisting of a Super Deluxe shock and a special Lyrik Ultimate fork which uses a tapered 1.8″ steerer tube that’s supposed to increase the stiffness around the head tube. in practice, we couldn’t feel any difference on the trail compared to a normal fork. The proportions of the fork do suit the bulky head and down tube better though. Unfortunately, the Schwalbe tire combination of a 29 x 2.35″ Magic Mary up front and 27.5 x 2.6″ Hans Dampf at the rear only featured the puncture-prone SnakeSkin casing and slightly more robust Apex casing respectively. BULLS’ in-house aluminium cockpit pairs well with the bulky look, but it creaked audibly on our test bike whether we were pedalling or descending.

Get out of the way
The EightPins dropper post is integrated into the frame of the BULLS and offers up to 228 mm travel, getting completely out of the way.
Braking power available!
The MAGURA MT7 with the new 220 mm MDR-P rotor is the most powerful and best MAGURA brake we have ever ridden. Nevertheless, you still get plenty of modulation.
Safety first
The massive SONIC Rock Guard does a good job of protecting the Bosch Performance Line CX motor.


€ 7,399


Motor Bosch Performance Line CX 75Nm
Battery Bosch PowerTube 625Wh
Display Bosch Kiox
Fork RockShox Lyrik Ultimate 150 mm
Rear Shock RockShox Super Deluxe RT Select+ 150 mm
Seatpost EightPins NGS2 168 – 228 mm
Brakes MAGURA MT7 220/200 mm
Drivetrain SRAM Eagle AXS 1x12
Stem BULLS Aluminium 50 mm
Handlebar BULLS Aluminium 800 mm
Wheelset DT Swiss HX1501 SPLINE 29"/27.5"

Technical Data

Size S M L XL
Weight 23.06 kg
Perm. total weight 125 kg
Max. payload (rider/equipment) 101 kg
Trailer approval no
Kickstand mount yes

Specific Features

Monkey Link

More electronics
The wireless SRAM XX1 Eagle AXS drivetrain controls the 12 gears.
In your field of vision
The Bosch Kiox display is positioned far in front of the handlebar where you can see it easily. In case you crash, the bracket is designed to twist and protect the display from damage – an elegant solution!
Twist it
The SONIC Bottle Lock not only accommodates the bottle cage but also keeps the battery cover attached to the frame. The battery can easily be removed by lifting it up and to the side.

Geometry and size of the BULLS

The geometry of the SONIC EVO AM is straight down the middle. It’s neither radically long and slack nor is it outdated, compact and nervous.

Size S M L XL
Seat tube 410 mm 440 mm 470 mm 505 mm
Top tube 580 mm 593 mm 618 mm 641 mm
Head tube 120 mm 120 mm 130 mm 140 mm
Head angle 66° 66° 66° 66°
Seat angle 74° 74° 74° 74°
Chainstay 450 mm 450 mm 450 mm 450 mm
BB Drop 17.5 mm 17.5 mm 17.5 mm 17.5 mm
Wheelbase 1198 mm 1213 mm 1238 mm 1262 mm
Reach 425 mm 440 mm 461 mm 482 mm
Stack 619 mm 619 mm 630 mm 639 mm
Helmet Bell Sixer MIPS Fasthouse Edition | Backpack Fox Utility Hydration Pack | Jersey Fox Indicator LE LS Jersey | Shorts ION Scrub Amp | Knee pads ION K-Lite ZiP

The BULLS SONIC EVO AM 6 Carbon on the trail

When you’re climbing, the pedalling position on the BULLS is comfortable and perfectly suited to long rides. However, rather than feeling integrated between the wheels, you feel like you’re perched on top of the bike. The BULLS SONIC EVO AM 6 lacks the precision to master more technical climbs. Although the front wheel stays on the ground without you having to shift your weight, it’s not planted enough to prevent understeer. You also have to fight for traction on the rear wheel because the fragile Apex casing of the Hans Dampf tire is at risk of puncturing if you run the pressures too low. The hard ADDIX Speedgrip rubber compound doesn’t help either.

We didn’t feel any difference on the trail with the new 1.8″ tapered steerer tube, either positively or negatively. Visually, the proportions of the fork match the bulky head tube much better.

Once you start heading downhill, the SONIC instils you with confidence even when things get steep. The tall front end, the grippy front tire and the powerful brakes invite you to charge on. On flowing trails with berms, rollers and small jumps the suspension provides a lot of feedback and offers enough mid-stroke support for you to pump the bike and get it airborne. On natural singletrack and at higher speeds, the balance between the front and rear wheels isn’t quite as good. While the front wheel will hold your line through open corners as if it’s on rails, the rear end tends to slide out and reminds you not to overdo it.

The BULLS SONIC EVO AM 6 Carbon is a true SUV: both in looks and everyday practicality.

Tuning tip: rear tire with the more robust SuperGravity carcass and softer rubber compound

Riding Characteristics



  1. sluggish
  2. playful


  1. nervous
  2. stable


  1. demanding
  2. balanced

Riding fun

  1. boring
  2. lively

Motor feeling

  1. digital
  2. natural

Motor power

  1. weak
  2. strong

Value for money

  1. poor
  2. top


Forest road


Flow trail uphill


Flow trail downhill


Technical single trail uphill


Technical single trail downhill


Downhill tracks



The BULLS SONIC EVO AM 6 is a real treat to look at. The design, integration of the motor and the quality of the workmanship of the frame are top-notch. But we weren’t entirely convinced by the spec and handling at high speed. The BULLS SONIC EVO AM 6 feels equally at home on flow trails and leisurely rides as it does in day to day use and thanks to the clever MonkeyLink system, you can easily attach the necessary accessories.


  • confidence-inspiring
  • excellent brakes
  • MonkeyLink mounts (lights and water bottle)


  • creaking cockpit
  • rear tire limits the climbing and descending capabilities
  • unbalanced handling

You can find out more about the BULLS SONIC EVO AM 6 Carbon at bulls.de.

The test field

You can find everything you need to know about our test for the best eMTB of 2020 right here!

All bikes in test: BULLS SONIC EVO AM 6 | Cannondale Moterra 1 | Canyon Spectral:ON 9.0 | COMMENCAL META POWER 29 TEAM 2020 | CONWAY XYRON 927 Carbon | CUBE Stereo Hybrid 160 HPC | FANTIC XF1 180 Race | FOCUS JAM² 9.9 DRIFTER | Giant Reign E+ 0 Pro | Haibike XDURO Nduro 10.0 | Liteville 301 CE MK1 | MERIDA eONE-SIXTY 10K | Moustache Samedi 27 Trail | Norco Range VLT C1 | NOX Hybrid Enduro 7.1 | Orbea WILD FS M-LTD | Pivot Shuttle 29 | Rocky Mountain Altitude Powerplay Carbon 90 Rally Edition | ROTWILD R.X750 ULTRA | SIMPLON Rapcon Pmax | Specialized Turbo Kenevo Expert | Specialized S-Works Turbo Levo | Trek Rail 9.9 | Whyte E-180 RS V1 | YT DECOY CF Pro Race

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Words: Felix Stix, Robin Schmitt, Jonas Müssig Photos: Finlay Anderson, Robin Schmitt, Felix Stix, Markus Frühmann