Drivetrain |
Brompton 4 speed drivetrain, 163% range |
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Frame |
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 |
PUBLIC 4130 100% Chromoly steel, with fender and rack braze-ons, integrated kickstand bracket |
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Stem |
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High polished alloy, threadless, +/- 10 degree rise, 25.4 clamp (80 mm for S/M; 100 mm for M/L) |
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Handle Bar |
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PUBLIC Brunch handlebar, alloy, 570 mm wide |
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Fork |
Superlight Titanium fork with a threaded headset |
PUBLIC 4130 100% Chromoly steel unicrown disc fork, with fender and rack braze-ons |
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Seatpost |
Brompton Standard Chromoly steel tube – gloss black. Suitable for maximum inside leg 33″/83cm |
Kalloy Alloy micro-adjust high polish 27.2 mm x 350 mm length, with integrated clamp |
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Grip |
Superlight lock-on grips with precision ground lightweight foam adhered to ultrathin engineered core weighing just 42g per pair |
PUBLIC Slender Grip, with alloy clamps |
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Crankset |
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Shimano Alfine S501 Crankset, 39T, 170 mm |
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Pedals |
Brompton Folding left hand and non-folding right-hand pedals |
Wellgo alloy platform pedal, with rubber pads, 9/16" axle |
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Chain |
Hollow pin Superlight Advance Chain |
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Shifters |
Brompton 4 speed trigger shifter |
Shimano Alfine Rapidfire trigger shifters for 8-speed internal hub |
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Gear |
4-speed gear system |
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Saddle |
Fizik Aliante R7 – a comfortable saddle with lightweight performance from its Composite Carbon Nylon shell |
PUBLIC Premium Comfort Saddle, 221 mm wide, with brass rivets, coil springs, and saddlebag hooks |
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Headset |
Brompton Superlight headset |
1 1/8" threadless, steel |
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Derailleur Rear |
Patent-pending direct mount 4 speed derailleur |
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Hub Front |
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Shimano Alfine 8-speed internal hub with disc mount |
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Hub Rear |
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Formula alloy hub with quick-release axle |
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Spoke |
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Stainless steel 14G |
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Chainrings |
6061 forged aluminium crank with 50T chainring and integrated chainguard |
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Sprocket |
11-13-15-18 Tooth |
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Bottom Bracket |
Square taper bottom bracket |
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Stand |
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Massload alloy center mount Kickstand |
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Front |
Schwalbe ONE Black Tyre |
Kenda Kwest, 700 x 35c, 60TPI, Cream |
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Rear |
Schwalbe ONE Black Tyre |
Kenda Kwest, 700 x 35c, 60TPI, Cream |
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Wheel / RIM |
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 |
Painted to match, alloy double wall, 32H |
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Tube |
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Presta, 48 mm vallve |
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