The Btwin Rockrider E-ST 900 27.5+ electric mountain bike. The Samsung battery with the motor, a BROSE T Aluminium provide 70nm of torque. The Shimano Deore for the drive train and ST 900 with a single chainring.

Btwin Rockrider E-ST 900 Electric Mountain Bike – 27.5+. 2020 specifications

Frame:
The frame was designed using 6061 aluminium with hydroformed tubes.
Forged aluminium parts make it compatible with the new 27.5″+ tyre format in the rear.
Frame geometry with short bases for easier steering.

Motor:                                                                                                                                                                                                                                                          Torque: 70NM
The BROSE T Aluminium central motor, designed for high altitude mountain biking:
70 Nm torque for steep gradients
belt for an ultra-quiet motor
sealed bearings for tough environments.

Samsung battery cells:
Equipped with SAMSUNG SDI cells.

Battery lock:
Battery designed that locks in place with a simple lever.
A key lock to protect from theft.

Rockshox front suspension:
Rockshox JUDY fork with 120 mm of travel.
a thru axle and tapered steerer tube.
pneumatic spring
rebound adjustment and lockout.

Control screen:
Convenient LCD control screen.
4 assistance modes available:                                                                                                                                                                                                                                        Mode 0 Deactivated                                                                                                                                                                                                                                                    Eco+, Economy, Standard, Boost.
Assistance level
Battery level
Speed
Remaining battery life:
Distance covered
Micro USB plug for charging your smartphone/GPS/camera…                                                                                                                                                                           The battery is not used.
Mode 1  Economy +40%:
Mode 2  Economy +80%:
Mode 3  Standard +160%:
Mode 4  Boost +320%

Single chainring drivetrain:
The E-ST900 electric bike has a single chainring and ChainFlow 3D anti-drop technology to prevent chain drops.
A single shifter on the right handlebar makes it easy to shift between the 10 speeds.
ChainFlow anti-derailment 34-tooth chainring
SHIMANO DEORE M6000 Shadow+ 10-speed rear derailleur with long cage
SHIMANO DEORE M6000 right shifter
SHIMANO DEORE 10-cog cassette (11-42 teeth)
KMC E10 Turbo special e-bike chain

27.5+ Sunringle Duroc 40 wheels:
36 mm rims and 32 spokes at the front and rear
and a good hold on wide (2.8″) tyres.
BOOST thru axles (12×148 rear, 15×110 front)
Aluminium hubs with sealed bearings
TUBELESS READY rims: you will need tubeless tyres, Presta valves, and puncture

Platform pedals:
ROCKRIDER Flat MTB platform pedals. The pedal surface is
wider and the dots more pronounced.

Hutchinson tyres:
The E-ST900 mountain bike is equipped with Hutchinson Taipan Koloss 27.5+ tyres with a 2.8″ cross-section.

Hydraulic disc brakes:
The Tektro TKD32 hydraulic disc brakes on
the front and rear for powerful, progressive braking. Oversized 180mm diameter discs.

Handlebars, stem, grip:
The adjustable stem brings the E-ST 900 controls to your hands. The all-aluminium ROCKRIDER stem is
70 mm (size S), 80 mm (size M/L), or 90 mm (size XL) and can be raised to 5 adjustment intervals:
+ 0mm, + 7.5mm, + 15mm, + 22.5mm, + 30mm.
720mm oversize ROCKRIDER SPORT aluminium handlebar
ROCKRIDER SPORT “soft touch” ergonomic grips

More information here  Btwin Bikes