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G-Line vs MTBrompton vs 18″ Brompton

With the launch of the new Brompton 20″ G-Line, I’ve put together a table comparing the G-Line to the MTBrompton. I’ve also added a comparison with an 18″ Brompton, because I think that is actually more like what the G-Line is like.

Brompton
G-Line
Kinetics MTBromptonKinetics
18″ Brompton
Folded Size?730 x 690 x 402 mm (0.2 m3)750 x 680 x 320 mm (0.16 m3)650 x 630 x 310 mm (0.13 m3)
Weight?13.9kg (no rack or mudguards)
14.85kg to 15.25kg
(with rack and mudguards)
14.1kg (no rack or mudguards)
14.75kg (integral rack and mudguards)
12.9kg (no rack or mudguards)
13.5kg (integral rack and mudguards)
Disc Brakes?Tektro hydraulicTRP Spyre
Magura MT4, MT5 etc
Hope XCR
TRP Spyre
Magura MT4, MT5 etc
Hope XCR
Hub Gear?Alfine 8-speedAlfine 8-speed or 11-speed
Rohloff 14-speed
Enviolo
Alfine 8-speed or 11-speed
Rohloff 14-speed
Enviolo
Derailleur Gear?4-speed on Electric modelsUp to 12-speedUp to 12-speed
Drive?Chain driveChain or Belt driveChain or Belt drive
Wheel Size?20″ up to 2.1″ wide20″ up to 2.4″ wide18″ up to 2″ wide
20″ up to 1.35″ wide
Electric Assist?Yes, rear hub motor with 4-speed derailleurYes – any front hub motor system, or Pendix mid driveYes – any front hub motor system, or Pendix mid drive
Lighting?Optional battery lightsOptional battery lights or hub dynamoOptional battery lights or hub dynamo
Rack?Optional rear load platform for top bagsOptional integrated rack for panniersOptional standard Brompton rack
Optional integrated rack
Colours?Adventure Orange, Traildust White, Forest GreenAny standard Brompton colour
Custom colours at extra cost
Any standard Brompton colour
Custom colours at extra cost
Luggage?Brompton-specific front bags, small rack-top bag at back.Brompton-specific bags, or full-size panniers front and backBrompton-specific bags, or full-size panniers front, and rack top bag
Material?Steel mainframe and rear triangle, aluminium fork and stemSteel mainframe, stainless rear triangle, Columbus steel forkSteel mainframe, stainless rear triangle, Columbus steel fork
Geometry?Bottom bracket height 290mm
Wheelbase 1115mm
Standard geometry:
BB height 350mm
Handlebar height (S) 1030mm
Head angle 70 deg
Seat angle 72 deg

Dropped geometry:
BB height 300mm
Head angle 66 deg
Seat angle 68 deg

Wheelbase 1118mm
Bottom bracket height 300mm
Upgrade?All new bike, existing bikes cannot be upgradedExisting Bromptons can be upgraded from £1435Existing Bromptons can be upgraded from £1275
Made?Made in the UK and other countriesHandmade in ScotlandHandmade in Scotland
Cost?From £2499 (with rack and mudguards)From £2635From £2660 (with mudguards)
*measurements and weights are for a G-Line with rack and mudguards, and a MTBrompton with 2.4″ tyres and wide wide bars

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