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    Twenty9 Evo 4

    Twenty9 Evo 4
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    Twenty9 Evo 4

    Maximum performance for rough, off-road tours


    Whether a sporty off-road jaunt after hours or trail action in the mountains - thanks to its powerful drive unit, fully integrated battery and top equipment, the TWENTY9 EVO 4 confidently spans the range of sporty e-mountain biking. With the power and energy reserves of the Bosch Performance Line CX drive unit, this versatile hardtail is also equipped for the most demanding tours. The necessary range stems from the fully integrated Bosch PowerTube 500-Wh battery that teams up with the motor to create a uniform drivetrain. This results in an optimal centre of gravity that ensures the best possible handling. Add to that the smooth running and superior roll-over behaviour of the 29-inch wheelset with the snappy Schwalbe Rocket Ron tyres and the outstanding traction and damping characteristics of the Fox Float 34 Rhythm suspension fork, and you get an e-MTB with the appeal of maximum performance on every short or long off-road tour.
    The article reference number is .

    Techn. spezifications


    Engine manufacturer Bosch
    Drive unit Bosch Performance Line CX
    Engine type Middle motor
    Torque 250 Watt
    Assistance speed up to 25 km/h
    Power pack Bosch
    Power type Lithium Ionen
    Battery voltage 36 V
    Battery capacity (Wh) 500 Wh
    Charging time 100% ca. 3,5 hrs
    Charging time 50% ca. 1,5 hrs
    Display Bosch Intuvia
    Frame Aluminium Hydroforming,Tapered Steerer, internal cable routing
    Frame size 46 cm, 51 cm, 56 cm, 60 cm
    Wheel size 29 inch
    Fork -
    Travel 120 mm
    Rear derailleur Shimano Deore XT RD-M8000D-GS Shadow Plus
    Shifter Shimano Deore XT SL-M8000
    Gears 11 derailleur gears
    Crank set Miranda
    Cassette Shimano SLX CS-M7000 11-46T
    Front brakes Magura MT5 hydraulic front disc brake
    Rear brakes Magura MT4 hydraulic rear disc brake
    Saddle Selle Royal Rampage
    Seatpost BULLS
    Chain KMC
    Rims BULLS AS-T30/T35
    Hubs BULLS
    Tires Schwalbe Rocket Ron SnakeSkin Addix Spgrip
    Tyre size 57-622 (29 x 2.25)
    Handelbar BULLS
    Stem -
    Pedals Wellgo
    Weight ca. 21,7 kg
    Sex Male
    Admissible total weight 115 kg

    Frame geometries


    Frame Geometry

    Frame geometries


    Frame Height 46 cm 51 cm 56 cm 60 cm
    Seattube length A 460 mm 510 mm 560 mm 600 mm
    Toptube length B 610 mm 630 mm 650 mm 670 mm
    Head Tube C 110 mm 110 mm 140 mm 180 mm
    Wheelbase D 1147.0 mm 1167.0 mm 1176.0 mm 1198.0 mm
    Chain strut E 470 mm 470 mm 470 mm 470 mm
    Crank Offset F 60 mm 60 mm 60 mm 60 mm
    Reach R 414 mm 434 mm 438 mm 446 mm
    Stack S 641 mm 641 mm 672 mm 710 mm
    Seating angle α 73.0° 73.0° 72.5° 72.5°
    Steering angle β 69.5° 69.5° 70.0° 70.0°

    Find the right frame size

    The right frame size is the basis for comfort, performance and long-term driving pleasure

    Our size recommendations for your BULLS bike according to the different bicycle types and areas of use. The information in the table serves as a reference. Your individual frame size may differ depending on your build.

    You could also just go to the BULLS specialist dealer right away for advice and take your pick during a test ride.

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