Brompton A Line Specifications

The Brompton A Line is Brompton’s most accessible folding bike, offering simple 3-speed gearing, a compact fold, and legendary Brompton build quality for everyday urban riding in Canada.

Brompton A Line Folding Bike Specifications

Key Specifications

• Weight: From 11.5 kg / 25.4 lbs

• Gearing: 3-speed

• Drivetrain Range: 177%

• Frame Material: Steel

Folded Dimensions

• Folded Size: 25.3" H × 23" W × 10.6" D
  (Compact Brompton fold for easy storage in apartments, condos, offices, and transit)

Frame & Fork

• 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

Cockpit & Contact Points

• Grips: Push-on rubber grips

• Seatpost: Extended silver seatpost (35")

• Saddle: Brompton A Line saddle

• Seat Clamp: Composite seat clamp and rear frame clip in matt black finish

• Hinge Clamps: Composite hinge clamp levers

Drivetrain & Gearing

• Drivetrain: Brompton 3-speed system

• Shifter: Brompton 3-speed shifter

• Derailleur / Chain Tensioner: Brompton chain pusher

• Sprocket: 13T

• Chainset: 6061 forged aluminium crank with 44T chainring and integrated chainguard

• Bottom Bracket: Square taper

Wheels & Tires

• Front Wheel: Double-wall rim, 28 spokes, Brompton front hub

• Rear Wheel: Double-wall rim, 28 spokes, Brompton standard-ratio 3-speed internal gear hub with 13T sprocket

• Tires: Schwalbe Kojak

  • Fast-rolling slick tire for smooth city pavement

• Tubes: Schrader valve

Braking & Safety

• Brakes: Brompton A Line caliper brakes

• Lighting: Reflectors included

Carrying & Accessories

• Pedals: Non-folding composite pedals

• Mudguards: Not included

• Rack: Not included

• Pump: Not included

• Front Carrier: Not included (available separately)