Brompton A Line | Folding Bike

A Line

Super simple. Super compact.

A Line is the Brompton folding bike with a one-size-fits-all spec. Robust and ready-to-ride. With a handmade steel frame and three hub gears tuned for city riding.

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Folded size

645mm (H) x 585mm (W) x 270mm (D) (25.3'' x 23'' x 10.6'')

Weight

11.6kg

Main Frame

Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints

Rear frame

Hand brazed cold-formed micro-alloy steel tubing

Fork

Steel brazed fork

Handlebar

A Line handlebar

Grips

Push-on rubber grips

Seatpost

Brompton Extended Chromoly steel tube. Suitable for maximum inside leg 35"/89cm

Saddle

A Line Saddle with integrated carrying handle

Seatclamp

Composite seat clamp and rear frame clip in matt black finish

Pedals

Non-folding composite pedals

Drivetrain

Brompton 3 speed drivetrain, 177% range

Chainset

6061 forged aluminium crank with 44T chainring and integrated chainguard

Bottom Bracket

Square taper bottom bracket

Shifters

Brompton 3 speed shifter

Front Wheel

Double-wall rim, 28 spokes, Brompton front hub

Rear Wheel

Double-wall rim, 28 spoke, Brompton Standard ratio 3 speed internal gear hub, 13 tooth sprocket

Tyres

349 x 35C puncture resistant Schwalbe Marathon Racer tyres

Tubes

Schrader valve

Mudguards

Not included but available separately

Brakes

Brompton calipers

Hinge clamps

Composite hinge clamp levers

Lighting (Reflectors)

Front and rear reflectors

Headset

Brompton headset

Front carrier

Not included but available separately

Notes

* Specifications are subject to change without notice

Previous model name

Brompton B75

A Line

All the essentials

A White steel frame. The original 3-part fold. Three easy-to-use hub gears. A natural sit-up and enjoy the ride position with a riser handlebar. And Genuine Brompton parts and fittings compatibility, so you can add as you go.

A Line

As easy as 1,2,3

Ready to roll? The A Line hub gears let you shift when stationary, so setting off is easy. Simply nudge the single lever up or down. The three gears are sealed within the middle part of the rear wheel. Protected from water, grit and impact, they enjoy a long life with minimum maintenance.

Bike Parts

Upgrade or upkeep. Repair or maintain. Genuine Brompton parts keep your bike on the road for longer.

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Bike Accessories

Useful add on-features engineered to enhance your ride.

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Brompton Bags

The best way to carry anything on your Brompton bike. Big, small or essentials only, like an extension of your bike, all of our bags click into place, sit secure and are made to last.

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