Brompton P-Line Black S4L


Brompton P-Line Black S4L


$225 Oversized Shipping Fee may be applied in addition to our standard flat rate fees.


Available For Purchase In Store ONLY

Performance. The lightweight transformation. Next level frame. Next level componentry. A next level ride.

Next level frame

The P Line titanium rear frame and fork are 700 grams lighter than the all-steel equivalent and are just as strong. The redesigned suspension block maximizes efficiency and responsiveness by shifting your pedal power to improve control and handling performance. Naturally, shock-absorbing titanium smooths out the road. You can feel the difference.

Close up of the new P Line rear triangle and drivetrain
The P Line being towed with its new dual-locking seat post
Enhanced portability
Moving with this bike is easy. Our new dual-locking seat post system has two positions, fully down for storing or halfway up for rolling. The folded bike gently steers through tight busy spaces with the Superlight Saddle nose handle. Larger, lighter rolling wheels glide over uneven ground.
Superlight, compact gear system built for the city

Designed in-house, the new superlight compact gearing system* is fine-tuned for city riding. The 4-speed system with an all-new 60-gram derailleur is meticulously engineered to fit inside the narrow fold. Delivering a similar ratio to the 3-speed and 60% more than the 2.


Close up of the all-new 60-gram derailleur and 4 speed system
A portrait of the P Line rear wheel
All-new wheelset
Our lightest, sturdiest wheelset. With a new rear hub designed ground-up to accommodate the new compact 4-speed gear set. Tested on a purpose-made rig and fired with mud, water and sand for hundreds of hours. This wheelset stands up to the abuse of the city. Now fitted with hex key axles and a new hanger mount, so removing them for roadside repairs or maintenance is quick and easy.

Out of stock

SKU: 34257 Categories: , , ,


Drivetrain: Brompton 4 speed drivetrain, 163% range
Main Frame: Precision drawn heat-treated steel tubing with hand brazing
Rear frame: Superlight Advance rear frame made from Titanium with a replaceable hanger
Fork: Titanium fork with a threaded headset
Weight: 21.8 lbs
Folded size: 25.3″(H) x 23″ (W) x 10.6″ (D)
Saddle: Superlight saddle with chromoly rails, carbon reinforced base and lightweight padding.
Seatpost: Brompton Extended Chromoly steel tube – gloss black.
Grips: Superlight lock-on grips with precision ground foam adhered to ultrathin engineered core
Seatclamp: Machined aluminium seat clamp and rear frame clip in anodised matt black finish
Pedals: Brompton Folding left hand and non-folding right-hand pedals
Hinge clamps: Machined aluminium hinge clamp levers and plates anodised matt black finish
Front Wheel: Superlight front wheel – Lightweight rim, double-butted spokes and aluminium hub body
Rear Wheel: Double wall rim, double-butted spokes and aluminium hub body
Tyres: Schwalbe ONE Black Tyre
Tubes: Schrader
Chainset: 6061 forged aluminium crank with 50T chainring and integrated chainguard
Bottom Bracket: Square taper bottom bracket
Derailleur: Patent-pending direct mount 4 speed derailleur
Sprockets: 11-13-15-18 Tooth
Shifters: Brompton 4 speed trigger shifter
Chain: Hollow pin Superlight Advance Chain
Chain Tensioner: Advance chain tensioner with replaceable hanger mounting
Brakes: Dual Pivot Calipers
Headset: Superlight headset
Front carrier: Front carrier block adaptor for all types of Brompton luggage
Fenders: New curved profile with updated Fenders flaps
Lighting: N/A
Previous Model: Brompton Superlight – H4L-X, M4L-X, S4L- X


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