Twenty9 E1



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With 29-inch wheels, powerful BOSCH Perfomance Line drive unit and an athletic frame design for maximum comfort and agility, the Bulls Twenty9 E1 is the companion you need for long off-road trails and on variable terrain. All day support is delivered by the high-performance Bosch battery pack. It is easily removed for charging, and locked with a key for extra security – available in 400Wh or 500Wh sizes.

SR Suntour XCM suspension forks, Shimano Deore 10-Speed derailleur and Tektro HD-M285 hydraulic disk brakes complete the kit on this this impressive value e-MTB.

If you’d like a test-ride please call in at our London, Leicester or Suffolk branches, or email us to arrange a date.

Bosch Performance Line

Bosch Performance Line

A drive system that reads your mind

Whether trekking, all-mountain riding or commuting: The sporty Performance Line is the perfect choice for ambitious eBikers. The finely balanced, high-performance system with a maximum torque of 63 Nm transforms eBikers into explorers and adventurers and provides the required power at any moment. Look forward to even more fun in the saddle – up to 25 km/h with the Performance Cruise drive unit or up to 45 km/h with the Speed model.

▶ Peak power: 500W (250 max continuous)

▶ Peak torque: 63 Nm

▶ Assistance level: ECO: 50%

TOUR: 110%

SPORT: 170%

TURBO: 260%

The level of assistance ranges between 50% and 260% depending on which power level you choose; 100% assistance equates to the motor doubling your pedaling force.

Electric Bike Battery

Bosch performance e bike battery 271x300
Bosch performance e bike battery 271×300

Bosch’s lithium-ion based e-bike batteries are lightweight, compact and available in 400Wh and 500Wh capacities. With unrivaled energy density Bosch batteries offer market leading range to weight ratios whatever size you choose.

They are easy to fit and remove, and can be charged either on the bike or unlocked using its key for charging at home or work. The battery management system provides optimal protection against overload, overheating and short circuit.

Modern Bosch lithium-ion batteries do not suffer from ‘memory effect’ or self-discharge issues. Your battery will charge to 50% in about 2 hours, depending on the charger and battery capacity.

Electric Bike Display & Assistance Control

The Bosch Purion display gives you all the information needed to monitor and adjust your e-bike. The illuminated screen is clearly visible under all lighting conditions and  thumb switches enable you to change assistance levels while keeping your hands safely on the handlebar. As well as speed, range, battery level and trip functions the display also lets you know  when it’s time to haver your e-bike serviced!

▶ Micro USB connectivity

▶ Five assistance levels

▶ Back-lit LCD

▶ Info on charge status, speed, assistance level, range, trip and total distance.


Motor manufacturerBosch
Drive unitBosch Performance Line
Motor typeMiddle motor
Torque250 Watt
Assistance speedup to 25 km/h
Power packBosch
Power typeLithium Ionen
Battery voltage36 V
Battery capacity (Ah)11 Ah, 13,4 Ah
Battery capacity (Wh)400 Wh
Charging time 100%ca. 6,5 hrs
DisplayBosch Purion LCD
FrameAluminium Hydroforming,Tapered Steerer, internal cable routing
Frame size46 cm, 51 cm, 56 cm
Wheel size29 inch
ForkSR Suntour XCM DS HLO
Travel100 mm
Rear derailleurShimano Deore RD-M592-SGS Shadow
ShifterShimano Alivio SL-M4000
Gears9 derailleur gears
Crank setMiranda
CassetteShimano CS-HG200-9 11-36T
BrakesTektro HD-M285 hydraulic disc brakes
Brake leversTektro HD-M285
SeatpostSTYX Aluminium
HubsSTYX Aluminium
TiresSTYX Ace of Pace
Tyre size57-622 (29 x 2.25)
HandelbarSTYX Aluminium
StemMonkey Link 3
Weightca. 22,7 kg
Maximum rider weight115 kg


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