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 |
Hi-Ten steel, BMX geometry |
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Stem |
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Mongoose, threaded top load, 50 mm |
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Handle Bar |
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Mongoose, Hi-Ten steel, 26 in width, 7 in rise, 22.2 mm clamp |
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Fork |
Superlight Titanium fork with a threaded headset |
Hi-Ten steel, 20”, steel steerer, 3/8” x 100 mm |
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Seatpost |
Brompton Standard Chromoly steel tube – gloss black. Suitable for maximum inside leg 33″/83cm |
Steel, 250 mm, 25.4 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 |
Mongoose Zig, 130 mm |
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Crankset |
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1-piece, forged steel, 36T steel chainring |
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Pedals |
Brompton Folding left hand and non-folding right-hand pedals |
BMX, nylon |
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Chain |
Hollow pin Superlight Advance Chain |
KMC |
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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 |
Mongoose, steel rails |
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Headset |
Brompton Superlight headset |
Threaded, 1” external, ball bearing |
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Derailleur Rear |
Patent-pending direct mount 4 speed derailleur |
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Hub Front |
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Steel, ball bearing, 3/8 in axle, 36H |
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Hub Rear |
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Steel, ball bearing, 3/8 in axle, 36H |
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Spoke |
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14G, steel, black |
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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 |
American loose ball, American loose ball |
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