

ARCC Converted Brompton AT4
£7,900.00
The ARCC Electric converted T-Line, weighing just 12.3kg seamlessly integrated with the ARCC system. Experience state-of-the-art electric features, fully foldable with the battery conveniently attached.
Weighing 3.3 kg less than Brompton’s electric P-Line, our AT4 redefines what it means to be a lightweight ebike, creating a premium electric T-Line, something even Brompton have not been able to achieve.
The system uses standard Bosch professional power tool batteries making it simple to expand range, replace or upgrade.
The Lightest Premium ARCC Converted Brompton Bike
As well as providing smoother and more progressive power delivery for confidence inspiring, wobble-free electronic assistance, our Intelligent Drive Pod system fitted to the T-Line enables us to offer the most sophisticated electric T-Line on the market.
Making use of the smart tech inside our system, your T-Line has never felt so nimble!
It can be fully folded with the battery still attached and can be optionally used with most Brompton bags.
The ARCC Converted Brompton AT4 comes with the following as standard:
- ARCC Intelligent Drive System (IDS)
- ARCC Aikema 36V/250W DC Brushless Front Hub Motor
- Launch Control
- Hill assist (Inclinometer)
- Multiple Assist Modes (Seven)
- Manual and Automatic
- Limited to 15.5mph/25kmh
- Can be ridden without the battery
- 4Ah Bosch 36v Battery (up to 35km)
- Bosch GAL3860 CV fast charger (35mins full charge time 4Ah)
- Neoprene Battery cover
- Brake Switch front and rear (Including Four CNC Machined Black Anodised Ferrules)
- ARCC Intelligent drive pod CNC Machined Black Anodised
- ARCC Bluetooth CNC Machined Remote Controller Anodised inc. micro-USB-C cable
- ARCC Control Cradle CNC Machined Black Anodised
- NCTE Torque and Cadence sensor bottom bracket (Square Taper)
- 4 Speed Gearing
- Spoke Reflectors
- Mid Handlebars
- ARCC Custom Titanium Forks – 5-year warranty
- Schwalbe Marathon Racer folding Tyre (Tan Wall)
- Two Custom Red Spokes
- iOS App compatible (Free App)
- 5-year warranty on the electric system
- 3-year Bosch battery warranty
- Free 1st service (If booked within 8-weeks)
Converting Brompton’s lightest folding bike to an ebike
Our converted T-Line – AT4 starts life as an original Brompton T-Line full titanium frame bike.
We carefully convert it to an e-bike at our Cambridge factory; adding a motor to the front wheel, a bottom-bracket torque and cadence sensor, our Intelligent Drive System, and a standard Bosch professional power tool battery, collectively weighing 3.9kg, which allows us to achieve a weight of just 12.3kg – 3.3kg lighter than Brompton’s lightest electric bike offering. On the AT4, we have replaced the front forks with Titanium forks – perfectly matching them to your bike frame.
Each bike is inspected and tested before it leaves our factory, and we are happy to offer a 5-year warranty on the drive system and forks.
You save significantly more weight switching to the ARCC Intelligent Drive System and we are proud to say our AT4 is the lightest comprehensive electric Brompton e-bike available.
“Smoothest performing and highest quality electric Brompton”
Read the review here: road.cc
As light as you need it to be.
The ARCC Intelligent Drive System is compatible with standard Bosch professional power tool batteries which are available in three sizes.
- 4Ah – Perfect for a work commute or a dash across a city centre – providing up to 22miles of range and charging fully within 35 Minutes.
- 6Ah – Great for longer rides and weekend trips – providing up to 34 miles range and fully charges in 55 minutes.
- 9Ah – With a range of up to 50 miles, the 9Ah battery is tailored for long-distance cycling, it is a reliable choice for those that want to go the extra miles!
Alternatively, for longer journeys, you can simply take an extra 4Ah/6Ah battery with you.
Replacement/additional batteries can be bought from most hardware shops, from us or online shopping.
Key Functions and Attributes
Key Functions and Attributes
UK Designed and
Manufactured
Torque and
Cadence Sensor
Auto Hill
Detection
Launch
Control
3.9kg
Lightweight System
Bluetooth Remote
Controller and Cradle
Range up to
100km
Bosch 3 Year
Warranty
Free iOS App
5 Year
Frame Warranty
Free First
Bike Service
Full Charge in
35mins
- Speed limited to 15.5mph/25km/h
- CNC machined and Anodised aluminium components
- 7 Assist levels
- 100km with additional spare battery
- ARCC handlebar mounted controller cradle
- Manual/Automatic modes
- Bluetooth wireless remote controller indicator LED’s – Bluetooth connection, assist level, battery status, mode selection
- 250-watt 36V DC brushless motor
- Bosch 4Ah, 6Ah, 9Ah Battery options
- Control Pod indicator LED’s – battery charge level, launch control, assist, fault detection
Efficient 35-minute charging time
Impressive range of up to 52km
Speed limited to 15.5mph/25km/h
CNC machined and anodised aluminium components
NCTE Torque and cadence sensing
Launch control, inclinometer/hill detection system
7 assist levels
Multiple modes
Manual/Auto
ARCC handlebar mounted Bluetooth remote controller.
250-watt 36V DC brushless motor
Bosch 4Ah battery as standard
Bosch 6Ah battery optional
Bosch 9Ah battery optional
Spare battery holder to double you range potential
iOS iPhone compatible App (free download)
ARCC Blue-Tooth handlebar mounted wireless remote controller
5 year ARCC system warranty
3 year Bosch battery warranty
Control Pod indicator LED’s – battery charge level, launch control, launch control status, assist, fault detection
Bluetooth wireless remote controller indicator LED’s – Bluetooth connection, assist level, battery low/charging, Bluetooth connectivity status, Auto mode, Manual mode

3.9kg
Lightweight technology

35min
Full charging time

52km
Max riding distance

5yr
Warranty included

Bosch
Batteries are used

Free
First Bike service
Bike Specification
ARCC Conversion Hardware/ Components | |
Drive/controller | ARCC Intelligent Drive System machined from solid billets Paraluman 470 Aluminium Grade 5083/AlMg 4.5 Mn. Black anodised. |
Battery | 4Ah Bosch 36v Battery (up to 35km) |
Battery cover | Neoprene Battery cover |
Spare battery holder | Optional Extra Anodised black with red lever |
Bluetooth controller | ARCC Bluetooth CNC Machined Controller Black anodised. Handlebar mounted. |
Remote control cradle | CNC machined and black anodised. Handlebar mounted. |
APP compatible | iOS app compatible (Free APP) |
Front hub | ARCC Aikema 250w 36v Brushless Dc Front Hub Motor 28h |
Tyres | Schwalbe Marathon Racer folding Tyre (Tan Wall) |
Spokes | 2 red spokes and black spokes |
Bottom bracket | NCTE Torque and Cadence sensing bottom bracket (Square Taper) |
Fork | ARCC Custom Titanium Forks – 5-year warranty |
Fork supports | Left and right CNC machined and black anodised. |
Brake switches | Front and rear CNC machined brake ferrules |
Original Components | |
Wheel Size | 16” |
Frame | Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold |
Rear Suspension | Brompton Suspension Block |
Separability/Folding | Folding |
Frame Finish | Titanium |
Mudguards | 16” Full Mudguards Front and Rear |
Headset | Brompton Superlight Headset |
Rear hub | Brompton 4 Speed Hub 28h |
Spokes | 28 |
Rims | Double Wall Rim 28h |
Crank set | 6061 forged aluminium crank with 54T chainring and integrated chainguard |
Brake levers | Brompton |
Brakes | Brompton Dual Pivot Calipers |
Gear lever | Brompton 4 speed |
Cassette/Sprocket | 11-13-15-18 Tooth sprockets |
Chain/Belt | Hollow Pin Superlight Advanced Chain |
Pedals | Brompton Superlight removable |
Seat post | Extended, Black (35″) |
Saddle | Brompton saddle |
Handlebar stem | Brompton Titanium Stem |
Handlebar | Brompton Mid |
Handlebar Grips | Superlight Lock-on foam grips |
Lighting/Reflectors | Reflectors front and rear |
Seat Post Clamp | Composite seat clamp and rear frame clip |
Frame Size | One Size |
Weight | 12.3kg with the battery |
Gearing | Brompton 4 speed drivetrain, 163% range |
Rear Derailleur | Direct Mount 4 Speed |
Rack | Optional Extra |
Folded Size | 25.3′ H’ x 23” W x 10.6” D |
Free Delivery
Weighing 3.3 kg less than Brompton’s electric P-Line, our AT4 redefines what it means to be a lightweight ebike, creating a premium electric T-Line, something even Brompton have not been able to achieve.
The system uses standard Bosch professional power tool batteries making it simple to expand range, replace or upgrade.
The Lightest Premium ARCC Converted Brompton Bike
As well as providing smoother and more progressive power delivery for confidence inspiring, wobble-free electronic assistance, our Intelligent Drive Pod system fitted to the T-Line enables us to offer the most sophisticated electric T-Line on the market.
Making use of the smart tech inside our system, your T-Line has never felt so nimble!
It can be fully folded with the battery still attached and can be optionally used with most Brompton bags.
The ARCC Converted Brompton AT4 comes with the following as standard:
- ARCC Intelligent Drive System (IDS)
- ARCC Aikema 36V/250W DC Brushless Front Hub Motor
- Launch Control
- Hill assist (Inclinometer)
- Multiple Assist Modes (Seven)
- Manual and Automatic
- Limited to 15.5mph/25kmh
- Can be ridden without the battery
- 4Ah Bosch 36v Battery (up to 35km)
- Bosch GAL3860 CV fast charger (35mins full charge time 4Ah)
- Neoprene Battery cover
- Brake Switch front and rear (Including Four CNC Machined Black Anodised Ferrules)
- ARCC Intelligent drive pod CNC Machined Black Anodised
- ARCC Bluetooth CNC Machined Remote Controller Anodised inc. micro-USB-C cable
- ARCC Control Cradle CNC Machined Black Anodised
- NCTE Torque and Cadence sensor bottom bracket (Square Taper)
- 4 Speed Gearing
- Spoke Reflectors
- Mid Handlebars
- ARCC Custom Titanium Forks – 5-year warranty
- Schwalbe Marathon Racer folding Tyre (Tan Wall)
- Two Custom Red Spokes
- iOS App compatible (Free App)
- 5-year warranty on the electric system
- 3-year Bosch battery warranty
- Free 1st service (If booked within 8-weeks)
Converting Brompton’s lightest folding bike to an ebike
Our converted T-Line – AT4 starts life as an original Brompton T-Line full titanium frame bike.
We carefully convert it to an e-bike at our Cambridge factory; adding a motor to the front wheel, a bottom-bracket torque and cadence sensor, our Intelligent Drive System, and a standard Bosch professional power tool battery, collectively weighing 3.9kg, which allows us to achieve a weight of just 12.3kg – 3.3kg lighter than Brompton’s lightest electric bike offering. On the AT4, we have replaced the front forks with Titanium forks – perfectly matching them to your bike frame.
Each bike is inspected and tested before it leaves our factory, and we are happy to offer a 5-year warranty on the drive system and forks.
You save significantly more weight switching to the ARCC Intelligent Drive System and we are proud to say our AT4 is the lightest comprehensive electric Brompton e-bike available.
“Smoothest performing and highest quality electric Brompton”
Read the review here: road.cc
As light as you need it to be.
The ARCC Intelligent Drive System is compatible with standard Bosch professional power tool batteries which are available in three sizes.
- 4Ah – Perfect for a work commute or a dash across a city centre – providing up to 22miles of range and charging fully within 35 Minutes.
- 6Ah – Great for longer rides and weekend trips – providing up to 34 miles range and fully charges in 55 minutes.
- 9Ah – With a range of up to 50 miles, the 9Ah battery is tailored for long-distance cycling, it is a reliable choice for those that want to go the extra miles!
Alternatively, for longer journeys, you can simply take an extra 4Ah/6Ah battery with you.
Replacement/additional batteries can be bought from most hardware shops, from us or online shopping.
Key Functions and Attributes
Key Functions and Attributes
UK Designed and
Manufactured
Torque and
Cadence Sensor
Auto Hill
Detection
Launch
Control
3.9kg
Lightweight System
Bluetooth Remote
Controller and Cradle
Range up to
100km
Bosch 3 Year
Warranty
Free iOS App
5 Year
Frame Warranty
Free First
Bike Service
Full Charge in
35mins
- Speed limited to 15.5mph/25km/h
- CNC machined and Anodised aluminium components
- 7 Assist levels
- 100km with additional spare battery
- ARCC handlebar mounted controller cradle
- Manual/Automatic modes
- Bluetooth wireless remote controller indicator LED’s – Bluetooth connection, assist level, battery status, mode selection
- 250-watt 36V DC brushless motor
- Bosch 4Ah, 6Ah, 9Ah Battery options
- Control Pod indicator LED’s – battery charge level, launch control, assist, fault detection
Efficient 35-minute charging time
Impressive range of up to 52km
Speed limited to 15.5mph/25km/h
CNC machined and anodised aluminium components
NCTE Torque and cadence sensing
Launch control, inclinometer/hill detection system
7 assist levels
Multiple modes
Manual/Auto
ARCC handlebar mounted Bluetooth remote controller.
250-watt 36V DC brushless motor
Bosch 4Ah battery as standard
Bosch 6Ah battery optional
Bosch 9Ah battery optional
Spare battery holder to double you range potential
iOS iPhone compatible App (free download)
ARCC Blue-Tooth handlebar mounted wireless remote controller
5 year ARCC system warranty
3 year Bosch battery warranty
Control Pod indicator LED’s – battery charge level, launch control, launch control status, assist, fault detection
Bluetooth wireless remote controller indicator LED’s – Bluetooth connection, assist level, battery low/charging, Bluetooth connectivity status, Auto mode, Manual mode

3.9kg
Lightweight technology

35min
Full charging time

52km
Max riding distance

5yr
Warranty included

Bosch
Batteries are used

Free
First Bike service
Bike Specification
ARCC Conversion Hardware/ Components | |
Drive/controller | ARCC Intelligent Drive System machined from solid billets Paraluman 470 Aluminium Grade 5083/AlMg 4.5 Mn. Black anodised. |
Battery | 4Ah Bosch 36v Battery (up to 35km) |
Battery cover | Neoprene Battery cover |
Spare battery holder | Optional Extra Anodised black with red lever |
Bluetooth controller | ARCC Bluetooth CNC Machined Controller Black anodised. Handlebar mounted. |
Remote control cradle | CNC machined and black anodised. Handlebar mounted. |
APP compatible | iOS app compatible (Free APP) |
Front hub | ARCC Aikema 250w 36v Brushless Dc Front Hub Motor 28h |
Tyres | Schwalbe Marathon Racer folding Tyre (Tan Wall) |
Spokes | 2 red spokes and black spokes |
Bottom bracket | NCTE Torque and Cadence sensing bottom bracket (Square Taper) |
Fork | ARCC Custom Titanium Forks – 5-year warranty |
Fork supports | Left and right CNC machined and black anodised. |
Brake switches | Front and rear CNC machined brake ferrules |
Original Components | |
Wheel Size | 16” |
Frame | Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold |
Rear Suspension | Brompton Suspension Block |
Separability/Folding | Folding |
Frame Finish | Titanium |
Mudguards | 16” Full Mudguards Front and Rear |
Headset | Brompton Superlight Headset |
Rear hub | Brompton 4 Speed Hub 28h |
Spokes | 28 |
Rims | Double Wall Rim 28h |
Crank set | 6061 forged aluminium crank with 54T chainring and integrated chainguard |
Brake levers | Brompton |
Brakes | Brompton Dual Pivot Calipers |
Gear lever | Brompton 4 speed |
Cassette/Sprocket | 11-13-15-18 Tooth sprockets |
Chain/Belt | Hollow Pin Superlight Advanced Chain |
Pedals | Brompton Superlight removable |
Seat post | Extended, Black (35″) |
Saddle | Brompton saddle |
Handlebar stem | Brompton Titanium Stem |
Handlebar | Brompton Mid |
Handlebar Grips | Superlight Lock-on foam grips |
Lighting/Reflectors | Reflectors front and rear |
Seat Post Clamp | Composite seat clamp and rear frame clip |
Frame Size | One Size |
Weight | 12.3kg with the battery |
Gearing | Brompton 4 speed drivetrain, 163% range |
Rear Derailleur | Direct Mount 4 Speed |
Rack | Optional Extra |
Folded Size | 25.3′ H’ x 23” W x 10.6” D |
Reviews
There are no reviews yet.
Free Delivery
Intelligent Drive System Specifications
- e-bike Classification:
- Pedelec (road-legal)
- Motor:
- Bafang/ Aikema: Brushless 250W 36V DC front wheel drive.
- IP Rating: 65.
- Battery:
- Bosch Li-ion 36V 4Ah (144 Wh).
- Bosch Li-ion 36V 6Ah (216 Wh) optional.
- Mains Charger:
- Bosch GAL3860 CV fast charger.
- Battery Charge Time:
- 4Ah: 25mins to 80%, 35mins to 100%
- 6Ah: 35mins to 80%, 55mins to 100%
- Control Pod:
- CNC-machined Peraluman 470 aluminium grade 5083/AlMg 4.5Mn. Black anodised finish.
- Control Pod USB Interfaces:
- 1 x USBC 2.0 charging/data port 5V, 1500mA.
- 1 x USBC 2.0 charging/data port 5V, 500mA.
- 1 x USBC 2.0 charging port 5V, 500mA.
- Bottom Bracket:
- NCTE torque and cadence sensor (square taper)
- Brake Switch:
- Safety cut-off switches, front and rear.
- Assisted Range:
- 4Ah up to 35km depending on riding style.
- 6Ah up to 52km depending on riding style.
- Maximum Assisted Speed:
- Power assist is limited to 15.5mph/25kmh
- System Weight:
- 2.6kg system only
- 3.9kg incl. 4Ah 36v battery.
- Assistance Remote Controller:
- ARCC Bluetooth remote Controller (Handlebar mounted) CNC-machined.
- iOS app compatible (Free APP)
- System Status Indicators:
- 2 x tri-colour LED’s.
- Spare Battery Holder:
- Optional spare battery holder – CNC Machined Peraluman 470 aluminium grade 5083/AlMg 4.5Mn anodised Black/Red.
Reviews
There are no reviews yet.