01 — Section
In-depth guides
Folding, gearing, tyre pressure, maintenance — the stuff I’ve worked out riding mine, not lifted from a press release. Where something took me a few goes to get right, I say so.
Independent record · Folding Gravel ─── Doc. FG-001 · Rev. 2026-05 EN / ES / CA
The independent G-Line record
Everything about the Brompton G-Line
The G-Line is Brompton’s all-road folder: 20-inch wheels, wide tyres, hydraulic discs — and it still folds like a Brompton. I ride one, with a C-Line parked next to it for comparison, and this site is the record I keep: setup guides, specs checked figure by figure, and accessory tests with no sugar-coating.
Wheel
20″ / 406
Class
All-road
Fold
Yes
Record
FG-001
02 — Section
Full specifications
Geometry, weight, drivetrain, tyres. I check each figure, and where I can’t confirm one against Brompton yet, I flag it — I won’t pass it off as fact.
03 — Section
Accessory comparisons
What actually fits the G-Line: bags, racks, lights, upgrades. What I run, what I returned, and when something isn’t worth your money I’ll just say so.