| 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 |
Series 3 Double Butted and Formed CrMo tubing, Integrated Drop-In Headset, External Rear Derailleur and Brake Housing, Internal Dropper Post Routing, 148x12mm Boost Rear Spacing, Post Mount Brake Mounts |
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| Stem |
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Marin 3D Forged Alloy, 35 mm |
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| Handle Bar |
Mid handlebar |
Marin Mini-Riser, 6061 Double Butted Aluminum, 780 mm Width, 28mm Rise, 5º Up, 9º Back |
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| Fork |
Steel Brazed Fork |
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| Seatpost |
Extended, Silver (35") |
X Fusion Manic, Regular = 150 mm Travel, Grande = 170 mm Travel |
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| Grip |
Push-on Rubber Grips |
Marin Single Clamp Locking |
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| Crankset |
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FSA Comet, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing |
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| Pedals |
Non-folding Composite Pedals |
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| Chain |
6061 forged aluminium crank with 44T chainring and integrated chainguard |
KMC X-12 Silver and Black |
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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 |
Marin Speed Concept |
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| Headset |
Brompton Headset |
FSA Orbit 40 No.42 ACB |
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| Derailleur Rear |
Brompton Chain Pusher |
Shimano Deore, 12-Speed, SGS |
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| Hub Front |
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Shimano HF-MT410B, 110 x 15 mm, Centerlock |
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| Hub Rear |
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Shimano HB-MT410B, 148 x 12 mm, Centerlock, Microspline Freehub Body |
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| Spoke |
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14g Black Stainless Steel |
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| Cassette |
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Shimano, Deore 12-Speed, 10-51T |
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| Sprocket |
13 Tooth |
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| Bottom Bracket |
Square taper bottom bracket |
Mego EXO 73 mm BSA |
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| Front |
Schwalbe Marathon Racer |
Maxxis Assegai 29 x 2.5", MAXX GRIP, Double Down, Tubeless Compatible |
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| Rear |
Schwalbe Marathon Racer |
Maxxis Assegai 29 x 2.5", MAXX GRIP, Double Down, Tubeless Compatible |
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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 |
Marin, Double Wall Alloy, 29 mm Inner, Welded Joint, Disc Specific, 32H, Tubeless Compatible |
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| Tube |
Schrader Valve |
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| About |
The Brompton A Line is a practical bicycle designed with a focus on utility. Its technical spec Read More |
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| Features |
- 3 Easy to use hub gears
- Folds in 20 seconds |
- Toptube Storage Mounts
- Investment cast Dropouts
- Gravity-oriented geometry, with a 63° headtube and 78° seattube angles, 44mm fork offset, and long reach measurements (Regular = 480mm, Grande = 510mm). |
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| Additional Details |
Folded Size: 25.3' H' x 23'' W x 10.6'' D
Hinge Clamps: Composite hinge clamp levers |
Size Range : Regular, Grande
Shift Lever : Shimano Deore, M6100, 12-Speed
Bolt-On Thru-Axle |
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