At 7.95 kg, the Brompton T Line 4 Speed is the lightest Brompton folding bike you can buy. That weight makes a real difference when you're lifting it onto a packed commuter train, carrying it up to a third-floor flat, or tucking it under your desk at work.
This is a titanium folding bike built for people who fold, carry and ride every single day, and don't want to feel the bike fighting them at any point.
The titanium frame weighs 37% less than Brompton's steel version. Combined with a carbon fibre fork, handlebar and crankset, the whole package feels noticeably different in your hands and under you on the road. The carbon components also dampen vibrations, which you'll appreciate on rough UK city streets and patchy tarmac.
Four gears give you enough range for urban riding without adding mechanical complexity. If your commute is mostly flat with the odd bridge or gentle incline, 4-speed is plenty. You get clean, reliable shifting and fewer parts to maintain. For riders who stick to city routes and want the lowest possible weight, this Brompton T Line 2026 model hits the right balance.
Folding takes about 20 seconds, same as every Brompton. But the T Line folds a touch faster and the folded package is easier to handle, thanks to refinements Brompton made after studying how people actually grip, tow and store the bike once it's folded. You can roll it along like a small case or carry it one-handed without it feeling awkward.
The Blasted Titanium finish
This Blasted Ti Brompton has a raw, matte titanium surface with a textured feel. There's no paint to chip or fade. Titanium resists corrosion naturally, so the frame copes well with rain, road spray and the general dampness of a British commute. It'll pick up marks over time, but titanium wears well, and most riders prefer the patina.
What's included
- Ultralight titanium frame, 37% lighter than steel Bromptons
- Carbon fibre fork, handlebar and crankset for vibration damping and weight savings
- 4-speed gearing system, designed to fit inside the fold
- Mudguards and luggage system included
- Front carrier block for Brompton-compatible bags
Who is this bike for?
The Brompton T Line 4 Speed suits city commuters who value low weight above all else. If you ride relatively flat routes and your priority is a bike that's easy to carry and quick to fold, this is the one to look at. Riders who need a wider gear range for hills or longer weekend rides should consider the 12-speed T Line instead.
As a premium folding bike in the UK, the Blasted Titanium sits at the top of Brompton's range. The price reflects the materials, the engineering and the weight savings.
If you've been riding a steel Brompton and found yourself wishing it were lighter, this lightweight titanium Brompton is the upgrade that will make the biggest day-to-day difference. It's the sort of bike where you pick it up and immediately understand where the money went.