The Sigma must surely be one of the lowest step-through folding electric bikes available on the market today. Manufactured in Europe to all the latest quality standards the Sigma inspires confidence. The low step-through frame makes it very easy to mount yet the frame colours and graphics give the bike style and panache.

The Sigma is fitted with Shimano Nexus 7 speed hub gears that are easily selected with the Nexus twist grip gear changer. Battery and assistance levels are readily seen and controlled from the handlebar mounted display.

The Sigma can easily be folded for storage making it ideal for motorhomes and leisure riders or for those with limited space at home. When folded the hub gears mean that the chain is kept neatly tucked away.

Liveried in a choice of one of three Batribike colours of Hunter Green, Earth Brown or White Shadow, the Sigma has colour matched mudguards and forks. The gold Jupiter Metallic chain guard and graphics compliment the frame colour, along with matching seat and grips, and quality Schwalbe tyres. This creates a very well presented folding electric bike.

Pricing from £1249

With 375 Wh Standard Battery (10.4 Ah) and LED Display

  • Add £105 for Mini LCD upgrade
  • Add £115 for Centre LCD upgrade
  • Add £105 for 475 Wh Long Range Battery (13.2 Ah)
  • Add £190 for 560 Wh Extended Duty Battery (15.6 Ah)

A stylish super-low step-through folding electric bike with 7 speed hub gears


 Standard Battery 45 to 100 km 28 to 62 miles
 Long Range Battery 60 to 132 km 37 to 82 miles
 Extended Duty Battery 75 to 150 km 47 to 93 miles

Distances tested with 75 kg rider on level ground with no wind.

 Overall Length 155 cm 61 ins
 Wheelbase 105 cm 41.3 ins
 Height 106 cm 41.7 ins
 Width 51 cm 20.1 ins
 Saddle Height – Standard 72  to 101 cm 28.4 to 39.8 ins
 Frame Size 35 cm 13.8 ins
 Step-Through 24 cm 9.5 ins
 Maximum Loading
(Rider & Luggage)
 120  kg 18 st 12 lbs
 Folded Size
73 x 82 x 48 cm 28.7 x 32.3 x 18.9 ins
 Total with Standard Battery 21 kg 46.3 lbs
 Bike Only 17.9 kg 39.5 lbs
 Standard Battery 3.1 kg 6.8 lbs
 Long Range Battery 3.6 kg 7.9 lbs
 Extended Duty Battery 4 kg 8.8 lbs
 Frame Material Aluminium Alloy
 Gears Nexus 7 Speed Hub
 Brakes Tektro V (Front and Rear)
 Lights System powered LED lights
 Saddle Selle Royal
 Bell In Brake Lever
 Stand Side – adjustable
 Gear Shift Nexus Revo Shift
 Wheel Size 20″
 Frame0502 – White Shadow
0503 – Earth Brown
0504 – Hunter Green
 ForksFrame Colour
 MudguardsFrame Colour
 ChainguardFrame Colour
 Saddle0502/0504 – Brown
0503 – Cream
 Grips0502/0504 – Brown
0503 – Black/Cream
 Tyres0502/0504 – Brown
0503 – Cream
Schwalbe Big Apple
 Battery PositionCarrier



This bike is supplied with a 36V 375 Wh battery as Standard. (10.4 Ah)

Optionally it can be upgraded with the following batteries:-

Part No.TypeRating
50774-BL-C-36V-UKLong Range475 Wh13.2 Ah
50775-BL-C-36V-UKExtended Duty560 Wh15.6 Ah

This bike is supplied with the LED Display as Standard.

LED Display

Five levels of speed related control.

Optionally it can be upgraded with the following:-

Mini LCD

Mini LCD – with 4 levels of power related control and built in speed/distance cycle computer.

Centre LCD

Centre LCD – with 5 levels of power related control and built in speed/distance cycle computer in a larger , easy to read package.

Read more about Display Options here…


The following items are available for this model:-