Brompton G Line 8 Speed Folding Bike

The Brompton G Line is Brompton's adventure folding bike featuring larger 20-inch wheels and gravel-ready tires. It's designed for riders who want to go beyond city streets onto mixed terrain trails and longer tours—while still folding in under 20 seconds.

The G Line weighs approximately 30.6-32.6 lbs depending on configuration. Heavier than the 16-inch wheel Bromptons, but the larger wheels and more robust build handle rougher terrain and provide a smoother ride over distance.

The G Line folds to approximately 28 by 26 by 16 inches—larger than the 16-inch wheel Bromptons but still compact enough for most transit systems, car trunks, and apartment storage. It folds in under 20 seconds like all Bromptons.

Wheel size is the main difference: G Line has 20-inch wheels; C Line has 16-inch. The G Line rides more like a traditional bike with better rollover on rough surfaces. The C Line folds smaller and is lighter. Choose G Line for adventure riding; C Line for maximum portability.

The G Line comes with 2.1-inch Schwalbe G-One All Round gravel tires—significantly wider than the 35mm tires on other Bromptons. These tubeless-ready tires handle pavement gravel packed dirt and light trails. The larger air volume provides cushioning and grip. The G Line comes with tubes installed, but we can convert it to a tubeless system upon request.

The G Line uses a Shimano Alfine 8-speed internally geared hub. This provides a wide gear range for hills and varied terrain with the reliability and low maintenance of an internal hub.

Yes. The G Line is Brompton's first model with hydraulic disc brakes. This provides more powerful and consistent stopping especially in wet conditions or when loaded with gear—essential for adventure riding.

The G Line comes in three frame sizes: Small Medium and Large—fitting riders from 5 feet to 6 feet 6 inches. This is different from other Bromptons which use handlebar type and seatpost length to adjust fit.

All standard Brompton front bags (C/P/T Line bags) will fit the G Line, except for the electric-specific bags. Some accessories like toolkits and tool pouches require G Line-specific versions.

Yes. The larger wheels roll more efficiently over distance, the wider tires handle varied surfaces, the disc brakes manage loaded descents, and the 8-speed hub provides range for hills. Combined with Brompton's luggage system, it's a capable light tourer.

Every Brompton from Clever Cycles includes our Pro Build—a $150 upgrade free. Your bike gets a full inspection, wheels trued and tensioned, brakes and gears dialed in, every fastener torqued to spec, then test-ridden and verified by a second mechanic before it ships. You also get warranty support, expert fitting advice, reward points, and zero-interest financing.

Yes. Brompton offers a 7-year warranty on the frame and 2 years on components when purchased from an authorized dealer like Clever Cycles.

At Clever Cycles yes. We keep demo bikes available so you can experience how the larger wheels change the ride feel compared to the 16-inch models.