| Drivetrain |
Brompton 3 speed drivetrain, 177% range |
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| Riding Modes |
3 Speed (Utility) |
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| Frame |
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 |
DK Zenith Disc hydroformed 6061 aluminum frame with tapered head tube, internal cable routing, CNC machined bridges, and forged sliding flat mount disc brake system |
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| Stem |
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DK forged alloy top load, 50mm reach |
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| Handle Bar |
Mid handlebar |
8” rise, 100% chromoly |
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| Fork |
Steel Brazed Fork |
BOX X⁵ carbon with 20mm thru-axle |
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| Seats |
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BOX Echelon 1-piece seat/post combo |
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| Seatpost |
Extended, Silver (35") |
Integrated, 27.2mm, alloy |
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| Grip |
Push-on Rubber Grips |
DK Tsuka lock-on with press-in bar plugs |
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| Crankset |
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DUO Brand C2 forged hollow alloy 2-piece, 175mm |
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| Pedals |
Non-folding Composite Pedals |
DUO Brand Resilite platform |
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| Chain |
6061 forged aluminium crank with 44T chainring and integrated chainguard |
Taya TB980 3/32” |
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| Shifters |
Brompton 3 Speed Shifter |
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| Saddle |
A Line saddle with black rails 147mm width
Composite seat clamp and rear frame clip in matt black finish |
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| Headset |
Brompton Headset |
DUO Brand, sealed integrated, tapered |
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| Derailleur Rear |
Brompton Chain Pusher |
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| Hub Front |
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DUO Brand R2, fully sealed, 20mm thru-axle |
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| Hub Rear |
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DUO Brand R2 Disc, fully sealed, 15mm thru-axle, 16-tooth cassette with 120 engagement points |
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| Sprocket |
13 Tooth |
DUO Brand 44-tooth, CNC machined, alloy, 4-bolt chainring |
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| Bottom Bracket |
Square taper bottom bracket |
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| Front |
Schwalbe Marathon Racer |
20x1.75” (rear), 20x1.95” (front) Maxxis Torch |
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| Rear |
Schwalbe Marathon Racer |
20x1.75” (rear), 20x1.95” (front) Maxxis Torch |
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| Wheel / RIM |
Rear Wheel: Double-wall rim, 28 spoke, Brompton Standard ratio 3 speed internal gear hub, 13 tooth sprocket
Front Wheel: Double wall rims, 28 spokes laced to a Brompton front hub |
DUO Brand R2, double wall, 36-hole, front and rear specific design |
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| Tube |
Schrader Valve |
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