Brompton
T Line 4-Speed
Grade 9 titanium and carbon throughout. 4-speed, 7.95kg - the lightest geared folding bike in the world.
Colour - Blasted Titanium
Handlebar - Low
About this bike
The T Line 4-Speed pairs a Brompton 4-speed hub gear with Brompton's titanium and carbon platform for a modest weight penalty and a useful 163% gear range. Four gears cover gradients from flat to around 10% with a comfortable cadence at city speeds, and mudguards are included as standard - making this the all-conditions ultralight. At around 7.95kg it remains the lightest 4-speed folding bike available anywhere in the world.
The Grade 9 titanium frame is TIG-welded and naturally damps road vibration that steel would transmit. Carbon fork, carbon handlebars, carbon crankset and a carbon saddle with an integrated carry handle are all standard, and the Brompton-designed quick-release pedals remove and stow in a single motion.
Finished in Blasted Titanium - a shot-peened raw titanium surface - with a choice of Low or Mid carbon handlebars. Self-aligning aluminium hinge clamps and a steel-armoured carbon seatpost to 35". Seven-year frame warranty.
See it fold
Every Brompton folds to the same compact size in around 20 seconds.
- Frame
- Grade 9 titanium TIG-welded, 7-year warranty
- Fork
- One-piece carbon fibre, vibration-damping
- Groupset
- Brompton 4-speed hub gear, 56T chainring, 11–18T sprockets
- Gears & speeds
- 4-speed internal hub, 163% range
- Wheelset
- 16" × 35C, Schwalbe ONE with Addix Race, V-Guard, reflective sidewall
- Brakes
- Brompton dual-pivot calipers
- Handlebar
- Carbon fibre, choice of Low or Mid
- Seatpost
- Steel-armoured carbon seatpost, 35"
- Weight
- From 7.95 kg