Disappointingly, Brompton hasn’t given the T Line Electric any more speed for US-based riders, so I’m afraid you’re limited to the UK speed limit of 15.5 mph instead of the Class 1 pedal assist maximum of 20 mph.
I first came across the e-Motiq system in 2024, when I tested the larger 20-inch Brompton G Line. This powerful rear-mounted motor, which can hit 20 mph, offered a more stable ride compared to the front-mounted design, and being pushed definitely feels more natural than being pulled along. The redesign also keeps the weight at the rear, so the folding mechanism remains balanced.
There are three power-assist levels available here, plus Push Assist (more on that below), and the e-Motiq system also adjusts based on your own riding style. It monitors pedal force and cadence. How often you stop and start and over your first 62 miles on the bike tweaks how the power is used. This isn’t to eke out out extra mileage, but to make your ride smoother and more natural.
During testing, I barely noticed any changes as I racked up the miles, but I was seriously impressed by how normal the bike felt. Well, normal for a marginally wobbly upright design with tiny 16-inch wheels. Yes, there was a surge of power as I started to pedal, but the initial acceleration was controlled. It felt more like I’d supercharged my legs, rather than strapped a motor to my bike.
My test bike was single-speed, but there is also a four-speed option available. Riding around London, I did not need more than one gear as the motor just takes the effort out of any hills. Endless traffic also means it’s harder to exceed top speed for long, but when the road did open, I was impressed by how easily it was able to transition between assisting and backing off the power to stick to 15.5 mph. I can only speculate, but on America’s bigger roads, I think I’d want four gears. I’d also want a boost in the speed assist limit. It’s a shame Brompton only thought to include one of those things.
I also rode a few miles without the battery pack, and was pleasantly surprised. It weighs less than my old steel Brompton, and feels much nicer to carry, too. I hauled the Electric T Line e-Motiq up countless stairs, onto the London Underground, slung it in the trunk of a taxi at 2 AM, and only left it in a restaurant cloakroom once. It is light and small enough to just carry with you, and it’s also expensive enough that you’ll never lock it up and leave it on the street.
I’ve also been able to ride the nonelectric titanium Brompton T-Line, which at 17.64 pounds, was almost laughably light. If you don’t need electric power, it is the perfect commuter bike.
Control, Extras, and Competition
Photograph: Chris Haslam
It’s tiny, but the handlebar-mounted controller does some cool things. There’s a start-assist button, that if you press just before you set off at traffic lights, or hit a hill for instance, will give you a powerful push to get you started. It’s not a throttle—you need to be stationary though for it to kick in.
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