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 100% Chromoly steel, with fender and rack braze-ons |
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Stem |
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Alloy, threadless high polish silver, 25.4 clamp (80mm for XS/S/M; 100 mm for L) |
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Handle Bar |
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PUBLIC alloy riser bar, 610mm wide, 10 deg backsweep, 20 mm rise |
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Fork |
Superlight Titanium fork with a threaded headset |
PUBLIC chromoly hi-tensile blend 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 with integrated clamp, 27.2 mm |
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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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Lasco alloy double crankset 46/34 tooth rings (S: 165 mm M: 170 L: 175 mm) |
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Pedals |
Brompton Folding left hand and non-folding right-hand pedals |
Wellgo M149 full alloy platform and cage, 9/16" axle |
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Chain |
Hollow pin Superlight Advance Chain |
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Shifters |
Brompton 4 speed trigger shifter |
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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 Sport Saddle, 153 mm wide, chromoly rails, with brass rivets |
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Headset |
Brompton Superlight headset |
1" threadless, steel |
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Derailleur Front |
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Shimano Sora R-3000 (2x9) |
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Derailleur Rear |
Patent-pending direct mount 4 speed derailleur |
Shimano Sora R-3000 9-speed |
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Hub Front |
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Alloy hub with bolt-on quick-release skewer |
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Hub Rear |
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Alloy hub with bolt-on quick-release skewer |
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Spoke |
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14G Stainless steel |
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Cassette |
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Shimano 9-speed HG400 11-32 tooth cassette |
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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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