Description
Brompton T Line 4-speed Folding Bike
The Brompton T Line 4-speed Folding Bike features a completely new titanium frame, 37% lighter than steel equivalents, giving a noticeable boost to handling, acceleration, and portability. Combined with over 150 weight-saving components, the bike is agile on city streets, responsive on weekend rides, and easy to carry or lift when needed.
Precision 4-speed gearing for control and agility
Designed specifically for urban riding, the 4-speed system enhances control, responsiveness, and efficiency. Expertly engineered to complement the lightweight titanium frame, the gears provide smooth, reliable shifting for stop-start traffic, rolling hills, or casual city rides. The result is a bike that feels lively, effortless, and perfectly suited for commuters and leisure cyclists alike.
Compact fold and seamless portability
Despite its high-performance design, the T Line 4-speed keeps Brompton’s iconic fold, transforming into a compact package in just 20 seconds. The integrated front carrier block allows you to lift, store, or roll the bike folded, making it easy to navigate trains, offices, or cafes. Lightweight, versatile, and practical, the Brompton T Line 4-speed Folding Bike is a city-ready companion that makes commuting and leisure riding simpler, faster, and more enjoyable.
Handlebar options:
- Low: The straight handlebar. For a sporty, more forward position.
- Mid: The riser handlebar. For a natural, relaxed position.
Technical Specification
| Handlebar Options | Low - Mid |
| Claimed Weight | From 7.95 kg |
| Speed | 4-speed |
| Material | Titanium |
| Folded Size | 25.4" H x 23.6" W x 12.6" D |
| Main Frame | Grade 9 titanium tubes, welded main frame with cast titanium bottom bracket manifold |
| Rear Frame | Advanced Superlight rear frame with replaceable hanger, suspension block and 54mm roller wheels |
| Fork | One-piece carbon fork and steerer with magnetic pedal holder |
| Grips | Superlight lock-on foam grips |
| Seatpost | Superlight standard seatpost (33") |
| Saddle | Superlight Carbon |
| Seatclamp | Machined aluminium seat clamp and rear frame clip in anodised matt black finish |
| Hinge Clamps | Machined aluminium self-aligning hinge clamp levers and plates, anodised matt black finish |
| Pedals | Superlight CNC aluminium pedal set with fixed right-hand and quick-release left-hand pedals |
| Drivetrain | Brompton 4-speed drivetrain, 163% range |
| Number of Gears | 4-speed |
| Chainset | Superlight carbon crankset with hollow BB30 axle, integrated spider, 50T chainring and chainguard |
| Bottom Bracket | FSA Mega Evo Bottom Bracket |
| Headset | Grade 9 titanium diameter tubes with integrated headset and spring-loaded steerer catch hinge |
| Shifters | 4-speed trigger shifter |
| Sprockets | 11-13-15-18 Tooth |
| Derailleur | Patent-pending direct-mount 4-speed derailleur |
| Rear Wheel | Lightweight rim, double butted spokes, aluminium hub body and 4-speed freehub body |
| Front Wheel | Lightweight rim, double butted spokes and aluminium hub with sealed bearings and allen key axle |
| Tyres | Schwalbe ONE with Addix Race rubber mix and V-Guard puncture protection |
| Tubes | Tubolito S-tubo 34g tube with Presta valves |
| Mudguards | Included |
| Lighting | Reflectors |
| Brakes | Brompton Dual Pivot Calipers |
| Front Carrier | Large diameter front carrier block adaptor for all types of Brompton luggage |
Size Guide
Brompton T Line 4-speed Folding Bike Sizing
Delivery & Returns
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