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Synch Longtail Step Through Monkey Electric Bike 250W

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£2,199.00
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Warranty: 2 Years

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The Synch Longtail Step-Through Monkey (ST) Electric Bike brings exceptional versatility to the beloved Monkey range, featuring a step-through frame for easy accessibility. Designed with a spacious extended seat, this two-seater electric bike delivers the added capacity needed for errands, commutes, or shared rides without compromising style or performance.

Equipped with a 250W Bafang rear hub motor and a 48V 16AH battery, the Longtail ST powers through up to 40 miles on a single charge, with a recharge time of just 4-5 hours. Its torque sensor responds intuitively to your pedal pressure, ensuring a smooth, efficient ride tailored to your needs. The bike’s Shimano 7-speed gears and Tektro hydraulic brakes offer reliable control, while the suspension front forks and puncture-resistant Synch (by Innova) tyres enhance comfort and durability on any journey.

The Longtail ST’s stable design makes it perfect for urban commutes, family outings, or weekend adventures. With a rider height range of 5’2” to 6’3”, a weight of 29kg, and a frame length of 175cm, this e-bike combines convenience and performance. Assembled in the UK, it includes a 2-year warranty on the frame and forks and a 1-year warranty on electrics, ensuring a reliable and stylish ride for every journey.

 

How is the frame size measured?

Most E-bikes are measured from the centre of the crank to the base of the seat post tube. However, some E-bike manufacturers may measure their bikes differently depending on their style. 

What is the right frame size for me?

This helpful guide will help you to find which size electric bike is best suited to you. If you would like a bit more information, don't hesitate to get in touch.

 

 

HYBRID ELECTRIC BIKES

MENS

Rider Height Recommended Hybrid Frame Size
Feet & Inches Centimetres Frame Size (inches) Frame Size (cm) Frame Size
4'10" - 5'2" 148cm - 158cm 13" - 15" 33 - 39 X-Small
5'2"" - 5'6"" 158cm - 168cm 15"-16" 38 - 44 Small
5'6" - 5' 10" 168cm - 178cm 17" - 18" 43 - 47 Medium
5'10" - 6'1" 178cm - 185cm 19" - 20" 48 - 52 Large
6'1" - 6'4" 185cm - 193cm 21" - 22" 53 - 57 X-Large
6'4" - 6'6" 193cm - 198cm 23" - 24" 58 - 61 XX-Large

 

WOMENS

Rider Height Recommended Women's Hybrid Frame Size
Feet & Inches Centimetres Frame Size (inches) Frame Size
4'10" - 5'2" 148cm - 158cm 13" - 14" X-Small
5'2"" - 5'6"" 158cm - 168cm 15" - 16" Small
5'6" - 5' 10" 168cm - 178cm 17" - 18" Medium
5'10" - 6'1" 178cm - 185cm 19"+ Large

 

VIEW ALL HYBRID E-BIKES

ELECTRIC MOUNTAIN BIKES

MENS 

Rider Height Recommended Mountain Frame Size
Feet & Inches Centimetres Frame Size (inches) Frame Size (cm) Frame Size
4'10" - 5'2" 148cm - 158cm 13" - 14" 33 - 37 X-Small
5'2"" - 5'6"" 158cm - 168cm 15" - 16" 38 - 42 Small
5'6" - 5' 10" 168cm - 178cm 17" - 18" 43 - 47 Medium
5'10" - 6'1" 178cm - 185cm 19" - 20" 48 - 52 Large
6'1" - 6'4" 185cm - 193cm 21" - 22" 53 - 57 X-Large
6'4" - 6'6" 193cm - 198cm 23" - 24" 58 - 61 XX-Large

 

WOMENS

Rider Height Recommended Women's Mountain Frame Size
Feet & Inches Centimetres Frame Size (inches) Frame Size
4'10" - 5'2" 148cm - 158cm 13" - 14" X-Small
5'2" - 5'6" 158cm - 168cm 15" - 16" Small
5'6" - 5' 10" 168cm - 178cm 17" - 18" Medium
5'10" - 6'1" 178cm - 185cm 19"+ Large

 

VIEW ALL EMTB's

COMMUTER ELECTRIC BIKES

MENS

Rider Height Suggested Commuter Bike Size
Feet & Inches Centimetres Frame Size (cm) Frame Size
4'10" - 5'0" 148cm - 152cm 47cm - 48cm XX-Small
5'0" - 5'3" 152cm - 160cm 49cm - 50cm X-Small
5'3" - 5'6" 160cm - 168cm 51cm - 53cm Small
5'6" - 5'9" 168cm - 175cm 54cm - 55cm Medium
5'9" - 6'0" 175cm - 183cm 56cm - 58cm Large
6'0" - 6'3" 183cm - 191cm 58cm - 60cm X-Large
6'3" - 6'6" 191cm - 198cm 61cm - 63cm XX-Large

 

WOMENS

Rider Height Suggested Women's Commuter Frame Size
Feet & Inches Centimetres Frame Size (cm) Frame Size
4'10" - 5'1" 147cm - 155cm 44cm - 46cm XX-Small
5'1" - 5'3" 155cm - 160cm 47cm - 49cm X-Small
5'3" - 5'5" 160cm - 165cm 50cm - 52cm Small
5'5" - 5'8" 165cm - 172cm 53cm - 55cm Medium
5'8" - 5'10" 172cm - 180cm 56cm - 57cm Large

 

VIEW ALL COMMUTER ELECTRIC BIKES

Large Range

The bike is equipped with a powerful Bafang rear hub motor, delivering a robust 250W of power to enhance your riding experience. Paired with a high-capacity 46V 16Ah battery, this bike provides ample energy for your journeys, allowing you to travel up to 40 miles on a single charge.

LCD Display

The Synch Super Monkey Long Tail Fat Tyre Electric Bike features an illuminated LCD display that not only provides clear visibility but also adds a touch of modernity to the bike's retro style. The LCD screen offers 5 levels of assist plus walk mode, allowing you to choose the level of electric assistance that suits your riding style and terrain.

Comfortable 2 Seater

The Super Monkey Longtail is specifically designed with an extended seat, providing comfortable seating for two people. Whether you're enjoying a leisurely ride with a friend or sharing the adventure with a loved one, the extended seat ensures that both passengers can relax and enjoy the journey together.

High Quality Parts

The Synch features "best in class" Shimano gears for smooth and precise shifting, while Tektro hydraulic disc brakes deliver excellent stopping power. With these high-quality components, the bike offers a reliable and responsive riding experience, making it a top choice for performance-oriented riders.

Fat Tyres

The Super Monkey Longtail ST is equipped with Synch (by Innova) puncture-resistant tyres, measuring 20 inches in diameter and 4 inches in width. These durable tyres provide versatility for both on-road and off-road adventures. Their robust construction ensures excellent grip and traction, allowing for confident handling across a range of terrains.

Optional Extras

The longtail has a great selection of optional add-ons to customize your riding experience. Enhance your visibility during night rides with the LED headlamp (added cost £50).

specifications

Battery and Range
48v 16Ah (up to 40 miles of range, more if lower level of assist is used). ** Range according to battery capacity. It is also dependent on the different riding conditions - terrain, rider weight, tyre pressure, headwind etc.
Motor
Bafang rear hub motor 250W
Display
Light up LCD display, 5 levels of assist plus walk mode
Lights
(optional add on) LED front headlamp, Rear LED brake and tail light.
Brakes
Tektro hydraulic disc brakes
Tyres
Synch (by Innova) puncture resistant tyres
Gears
Shimano 7 speed gears
Frame
6061 Aluminium Frame
Max Speed
15.5MPH
Max Rider Weight
120kg
Weight
25kg (including battery)
Warranty
Motor and battery 1 year, frame and forks 2 years
Delivery and Returns
FREE DELIVERY ON ALL ORDERS. Delivery 2-3 weeks. Cancelling your order: If you would like to cancel your order, please contact us immediately at info@ecobikecompany.com or on 0333 050 3189. Please include your order number when contacting us. If your order has not yet left the manufacturer's warehouse, we should be able to stop it shipping, and issue you a refund immediately. Please note –  when returning a product, it must be returned in ‘as new’ condition, with all components included, in their original packaging. There will be a charge for the return. Returns - Changed your mind If you change your mind after buying from us and want a refund, you have up to 14 days to let us know and have the goods returned to us. You will need to return the product to us before we can provide a refund. Eco Bike Co. can help arrange the return for a charge of £50 - a courier will be sent to pick it up from you & return it to the manufacturer.   Please note –  the 14 days return period is to allow you to examine the goods as you would in a shop. To obtain a full refund, the goods must be returned in an “as new” condition with all components included in their original packaging. “As new” condition is defined as unridden. Returns - Damages & Faulty We ask that you thoroughly inspect all items at the point of delivery. We advise you not to accept delivery of any damaged items. If you discover that an item has been damaged, please send clear photos of the damaged items to info@ecobikecompany.com so that we can open an insurance claim on your behalf. If your bike develops a fault through normal use (as outlined in the manufacturer's manual) you could be entitled to a repair or replacement as covered with the warranty. Please send through details of the fault to info@ecobikecompany.com and we will arrange the repair or replacement with the manufacturer. Please note –  any fault caused due to misuse of the bike is not covered by this policy. Please ensure you read the manufacturer's manual in detail before using your electric bike to avoid voiding your warranty.
Step Through Electric Bikes

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