🇬🇧 British-Built Fat Tyre Electric Bike
Take your ride to the next level with the Super Monkey Pro, the latest evolution of our iconic retro-styled fat tyre e-bike. Retaining the legendary frame of the original Super Monkey, this Pro edition introduces a rear passenger rack, giving you the flexibility to ride solo or share the adventure with a friend. Whether you're navigating city streets, cruising along coastal paths, or tackling off-road trails, the Super Monkey Pro delivers the perfect blend of power, comfort, and head-turning style.
🇬🇧 Built in Britain, Engineered for Performance
Proudly designed, engineered, and hand-built in the UK, Synch bikes stand out for their exceptional craftsmanship and innovative design. Unlike most e-bikes on the market, Synch is the first electric bike company to use batteries manufactured right here in the UK, ensuring top-tier quality, reliability, and sustainability.
Make It Yours – Custom Colour Options
Stand out from the crowd with a fully custom colour option. Simply choose any colour from the RAL chart, and we’ll build your Super Monkey Pro in a finish that matches your style. Whether you want bold, subtle, or completely unique, we’ll make it happen.
Powerful & Responsive Performance
- 48V / 250W Torque Sensor Drive System – Delivers a smooth, intuitive ride with enhanced pedal assist responsiveness.
- Fat Tyre Setup – Provides superior comfort, grip, and control on all terrains.
-
Rear Passenger Rack – Designed for extra functionality, whether for carrying gear or taking a passenger along for the ride.
Reliability You Can Trust
The Super Monkey Pro comes with:
✅ 2-year warranty on the frame and forks
✅ 1-year warranty on electrics for added peace of mind
Built to Order – Fast Turnaround
Every Super Monkey Pro is individually built to order, ensuring attention to detail at every stage. Current production lead time: 2 weeks.
Ready to ride? Choose your colour and experience the UK’s finest fat tyre e-bike today.
Please note the LED front headlamp & rear passenger rack is not included in the price and is an optional extra.
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 |
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 |
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

Built to Order in the UK 🇬🇧

Torque Sensor Drive System

UK-Manufactured Batteries

Customisable Bike

Ready to Ride – White Glove Delivery

2-Year Warranty for Peace of Mind
specifications
Battery and Range
Motor
Sensor
Display
Lights
Brakes
Frame
Suspension Forks
Tyres
Gears
Max Speed
Bike Weight
Bike Dimensions
Rider Height
Warranty
Delivery and Returns

Frame and Forks
2 years -
Electrical system
1 year
The Warranty is made to the original owner only and is non-transferable.
*excluding wear and tear, damage (accidental or otherwise).