Staiger Sinus Tria 8 ( demo bike )

2,399.00 1,700.00

These demo bikes have a maximum of 1500 kms on the odometer, have been serviced and looked after by GreenAer technicians with the upmost attention. They offer great value for money in excellent condition.  3 frame types available including Crossbar, Step-through and Trapeze in various sizes.

A  booking deposit would reserve one and will get in touch to discuss size availabilities.


In stock



The new Tria 8 from Staiger Sinus is a super reliable electric bike offering good components for an affordable price. This is our mechanics favourite bike because he rarely has to do anything with it! It’s excellent value considering how well spec’d out it is. It’s sporty yet comfortable making it a great touring bike and a great commuter.

Coming in three frame typesCrossbar, Trapeze and Stepthrough, the geometry and good weight distribution combine to make this a very manoeuvrable and well balanced bike. The external gear system allow the rider to change gears more rapidly. This makes the Tria 8 a real ‘riders bike’.


Harmonious, Homogeneous, Efficient

The Sinus Tria 8 is the entry level of ebike from Staiger Sinus’ trekking range. It has a great hybrid design and features a Shimano Acera 8sp rear derailleur as well as Tektro HD-M285 hydraulic disc brakes.

Bosch Active Line

The Active Line system from Bosch

The new 250W engine delivers the most natural support, with an impressive 1000 sensor measurements per second. Direct measurements are made via 3 sensors: Torque (pedalling force); Pedalling frequency; and Speed. The level of technology from Bosch is what makes Bosch motors stand apart from all other electrical motor manufacturers. It makes for a very intuitive and smooth assistance than can best be explained by going for a cycle on one.

There are 5 Drive modes: Off, Eco, Tour, Sport and Turbo, all easily accessed via the control unit that is mounted on the handlebars. When cycling on Turbo mode, the motor assists the rider up to 225%, supplying 50Nm of torque.

Improvements have been made on the new Active Line motor. There is a better ground clearance through the optimised integration of the drive unit, it’s also lighter and emits lower vibrations than previous models.

The Sinus Tria 8 features the shift detection technology, advising the rider when to change gears to reduce wear of components and save battery consumption.

The maximum range achievable with the 400Wh li-ion battery is 190 km (on Eco mode, at an average speed of 20 km/h with ideal conditions).From our experience, the average autonomy is more about 70km in one charge.

Great attention to details and finish

Apart from the quality of its electrical components, Sinus electric bikes distinguish themselves through their attention to detail. As with all the bikes in the Staiger Sinus range the Tria 8 is a durable, reliable and enjoyable bike to ride, even for the most demanding of users.

The Sinus Tria 8 is a superb electric bike, with all the qualities required for demanding urban use and /or long distance touring.

Tech Specs

Motor: Bosch Active Line, 250W / 36V, 25km/h

Display: Bosch Intuvia

Battery: Bosch Active Lithium-Ion 400Wh frame-mounted

Fork: SR Suntour NEX E25, travel: 50mm, aluminum shaft 1 1/8 “- 1 1/2″ tapered

Rear derailleur: Shimano Acera M360, 8 speed

Shifter: Shimano Altus M310, Rapidfire

Sprocket: Shimano HG31, 11-32 teeth

Chain: KMC Z8

Chainring: FSA stainless steel, 18

Brake lever: Tektro T285, Aluminium

Front brake: Tektro HD-M285, 180mm, aluminium

Rear brake: Tektro HD-M285, 160mm, aluminium

Tyres: Schwalbe Road Cruiser, Reflex, 28” (42-622)

Rims: Ryde Zac 421, hollow chamber rim, aluminum

Front wheel hub: Sinus Alunabe

Rear wheel hub: Alunabe, poem

Spokes: Stainless steel spokes, black

Handlebar: XLC Ergobar, oversize

Grips: Herrmans Clicker handles

Stem: XLC Comp Up, adjustable

Headset: A-Head Tapered

Saddle: Selle Bassano Volare City XL

Seat post: XLC aluminum, patent spring loaded, 31.6mm

Pedals: Alu, non-slip

Headlight – Rear light: Busch & Müller Lyt, 20 lux / Busch & Müller Shine Evo, integrated in the rear carrier

Mudguards: SKS, Chromoplastics

Rear Carrier: Racktime Tria, SnapIt

Kickstand: Ursus Mooi, adjustable

Weight: 24.2kg

Total perm. weight: 130kg

Bicycle type: City, Trekking