| 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 |
Felt Cyclocross UHC Advanced + TeXtreme carbon fiber, MMC with Inside Out construction, BB386 bottom bracket shell, 12 x 142 mm Syntace style thru axle, shoulder friendly top tube, flat mount disc brake standard, replaceable rear derailleur hanger, internal mechanical or electronic cable routing |
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| Stem |
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Devox, ±6¡ rise, ¯31.8 mm, 51 cm: 90 mm, 54 - 56 cm: 100 mm, 58 cm: 110 mm, 61 cm: 120 mm |
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| Handle Bar |
Mid handlebar |
Devox cross bend, 86 mm reach, 130 mm drop, 8¡ flare, ¯31.8 mm, 47 - 50 cm: 420 mm, 53 - 60 cm: 440 mm |
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| Fork |
Steel Brazed Fork |
Felt Cyclocross UHC Advanced + TeXtreme carbon fiber monocoque construction, Control Taper 1.125" - 1.5" aluminum steerer tube, carbon fiber blades, flat mount disc standard, 12 x 100 mm thru axle |
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| Seatpost |
Extended, Silver (35") |
Devox Lite Road, ¯27.2 mm x 300 mm length |
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| Grip |
Push-on Rubber Grips |
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| Crankset |
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Shimano GRX600, 46-30T, 47-50 cm: 170 mm, 53-55 cm: 172.5 mm, 57 - 60 cm: 175 mm |
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| Pedals |
Non-folding Composite Pedals |
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| Chain |
6061 forged aluminium crank with 44T chainring and integrated chainguard |
Shimano 11-speed |
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| Shifters |
Brompton 3 Speed Shifter |
Shimano GRX600 11-speed |
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| Saddle |
A Line saddle with black rails 147mm width
Composite seat clamp and rear frame clip in matt black finish |
Prologo Nago Evo X10 T2.0 |
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| Headset |
Brompton Headset |
FSA integrated sealed cartridge bearing with Felt Variable Height Cone Spacers (20 mm PC, 4.5 mm aluminum), Felt top cap and aluminum bolt, No.42, 1.125 - 1.5" |
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| Derailleur Front |
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Shimano GRX810 braze-on, with ¯34.9 mm clamp adapter |
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| Derailleur Rear |
Brompton Chain Pusher |
Shimano GRX812, 11-speed long cage |
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| Hub Front |
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Devox R3 Disc, sealed cartridge bearing, 11-speed, 12 x 142 mm thru axle, Center Lock, 28H |
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| Hub Rear |
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Devox R3 Disc, sealed cartridge bearing, 12 x 100 mm thru axle, Center Lock, 24H |
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| Spoke |
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2.0 mm stainless steel |
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| Cassette |
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Shimano 11-speed, 11-30T |
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| Sprocket |
13 Tooth |
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| Bottom Bracket |
Square taper bottom bracket |
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| Front |
Schwalbe Marathon Racer |
Schwalbe X-One All Around MicroSkin TL-Easy, folding, 700 x 33c |
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| Rear |
Schwalbe Marathon Racer |
Schwalbe X-One All Around MicroSkin TL-Easy, folding, 700 x 33c |
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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 |
Devox Variable Road C x 2.1, tubeless compatible 21 mm inner width, 23 mm depth |
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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 |
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| Additional Details |
Folded Size: 25.3' H' x 23'' W x 10.6'' D
Hinge Clamps: Composite hinge clamp levers |
Bar Tape : Felt CxGel tape with Felt Bubble-Tech F-Wing bar end plugs
Bottom Bracket : FSA BB386 with 30 mm bearings
Seatpost Clamp : Felt single bolt, ¯31.8 mm
Thru Axles : Front: 12 x 100 x 123, thread: M12 x 1.5P x 16L, Maxle; Rear: 12 x 142 x 163 (163L + 7 head = 170 total), thread: M12 x 1.0P x 19L, Syntace |
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| Accessories |
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Carbon assembly paste
Chain plate protector |
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