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  • Drivetrain: Brompton 4 speed drivetrain, 163% range
  • Main Frame: Precision drawn heat-treated steel tubing with hand brazing and selected auto-brazed joints
  • Rear Frame: Superlight Advance rear frame made from Titanium with a replaceable hanger, redesigned suspension block and new 54mm roller wheels
  • Fork: Superlight Titanium fork with a threaded headset
  • Weight: 9.89kg
  • Folded Size: 645mm (H) x 565mm (W) x 270mm (D) (25.3'' x 23'' x 10.6'')
  • Colour: Midnight Black Metallic
  • Saddle: Superlight saddle with chromoly rails, carbon reinforced base and lightweight padding. Includes integrated carry handle and light mount. Includes lightweight Superlight Pentaclip
  • Seatpost: Brompton Extended Chromoly steel tube - gloss black. Suitable for maximum inside leg 35"/89cm
  • Seat clamp: Machined aluminium seat clamp lever
  • Grips: Superlight lock-on grips with precision ground lightweight foam adhered to ultrathin engineered core weighing just 42g per pair
  • Pedals: Brompton Folding left hand and non-folding right-hand pedals
  • Hinge Clamps: Machined aluminium hinge clamp levers and plates anodised matt black finish
  • Front Wheel: Superlight front wheel - Lightweight rim, double-butted spokes and aluminium hub body with sealed bearings and hex key axle
  • Rear Wheel: Superlight 4 speed rear wheel - Lightweight rim, double-butted spokes and aluminium hub body with sealed bearings, newly developed 4 speed freehub body and hex key axle
  • Tyres: Schwalbe ONE Black Tyre
  • Tubes: Presta Valve
  • Chainset: 6061 forged aluminium crank with 50T chainring and integrated chainguard
  • Bottom Bracket: Square taper bottom bracket
  • Derailleur: Patent-pending direct mount 4 speed derailleur
  • Sprockets: 11-13-15-18 Tooth
  • Shifter: Brompton 4 speed trigger shifter
  • Chain: Hollow pin Superlight Advance Chain
  • Chain tensioner: Advance chain tensioner with replaceable hanger mounting
  • Handlebar: Low Handlebar (7050T74) aluminium with solution heat-treatment and shot-peened finish
  • Brakes: Dual Pivot Calipers
  • Headset: Superlight headset
  • Front carrier: Front carrier block adaptor for all types of Brompton luggage
  • Mudguards: New curved profile with updated mudguard flaps
  • Lighting (battery): Brompton 500 lumen USB rechargeable front light and Brompton rear battery lamp
  • Previous model name: Brompton Superlight S4L-X
- Courtesy of Brompton Bicycle Ltd. 
Photos courtesy of Brompton Bicycle Ltd.