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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsBrompton’s latest Electric range brings its e-Motiq drive system to the T, P, C and G Lines. Brompton says the system improves motor response, efficiency and weight balance while keeping the bikes’ established folding geometry. “Lighter” depends on the model and what is included in its weight; “smarter” describes app-linked ride information, service reminders and adaptive range estimates—not a guarantee of a particular real-world range.
What changed with Brompton’s new electric system?
e-Motiq is an evolution of Brompton Electric rather than a new folding-bike design. Brompton says it has retained the folding geometry and updated the electric system, including motor tuning, torque sensing, battery performance, balance and connected software. The company describes e-Motiq as shared across the Electric G, C, P and T Lines. Brompton’s engineering story also describes range estimation and start assist, with the possibility of delivering future system features through app-based over-the-air updates. It does not give a timetable or guarantee for specific future updates.
David Rhys, Brompton’s Head of Electric Systems, said the company “can’t afford to stand still” after launching Brompton Electric in 2018. That is the manufacturer’s explanation of the update, not an independent assessment of its performance.
How the four Electric Lines differ
The range is not a single bike made lighter in four sizes. Frame material, wheel size and intended use vary by line, and the listed weights are not all measured on the same basis.
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| Model | Construction and character | Published weight information |
|---|---|---|
| Electric T Line | Premium, titanium-led option; Brompton describes it as the lightest in the range. | 10.5 kg for the single-speed version without battery, according to Brompton’s buyer guide. This is not complete ready-to-ride weight. Source |
| Electric P Line | Titanium and steel frame, with 4- or 12-speed options. Brompton positions it for city riding and portability. | From 15.6 kg on Brompton’s product page; check the exact build and included equipment before comparing with other figures. Source |
| Electric C Line | All-steel folding-bike platform with e-Motiq. | A directly comparable current weight is not stated on the reviewed Brompton pages. Source |
| Electric G Line | Uses 20-inch wheels rather than the 16-inch wheels on the A, C, P and T Lines, which Brompton says suits varied terrain. Its folded package is larger than the other Electric Bromptons. | 16.2 kg for a small frame without battery, according to Brompton’s buyer guide. Source |
These are manufacturer product-page and buyer-guide figures, not independent comparative weigh-ins. Frame size, gearing, battery and equipment affect the result. For a useful comparison, check the exact bike’s ready-to-ride weight, folded dimensions, intended terrain and build price rather than treating the figures above as like-for-like.
What “smarter” means in practice
Brompton says e-Motiq learns a rider’s style during the first 100 km and then refines its range predictions every 6 km. The app is described as displaying speed, battery level, trip distance, estimated range and mileage-based service reminders. These are descriptions of the system’s features; the available product information does not establish the accuracy of its range forecasts independently. Brompton’s T Line product page gives further product details.
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The system has three powered assistance modes. A Cycling Weekly review of the Electric P Line describes four controller positions: three assistance levels plus zero assistance. Those descriptions are compatible: zero assistance is a setting, not a fourth powered mode. The review identifies a 250 W rear-hub motor and 345 Wh battery on the P Line; do not assume those precise specifications apply to every model or market without checking its local configuration.
Range, battery and safety claims
Brompton advertises up to 90 km (56 miles on its US page) for the Electric T Line. The company’s FAQ says range depends on assist level, terrain and rider weight, so “up to” is a manufacturer-stated maximum rather than a promise of typical distance. The UK T Line configuration page identifies a 345 Wh battery; confirm the battery supplied with the particular regional build. T Line product information
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Brompton says its electric bikes are independently certified to UL 2849. Its UK T Line page also lists a seven-year frame warranty and a three-year electric-system warranty when the bike is registered, along with a 28-day returns policy. Warranty and returns terms depend on the applicable country and purchase; verify them with Brompton or the seller before buying.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which Brompton Electric should you consider?
- Choose the T Line if minimizing bike weight is the priority and the premium titanium-led model suits your budget. Treat its 10.5 kg figure as a single-speed, battery-excluded specification.
- Consider the P Line if you want a titanium-and-steel build and a choice of 4 or 12 speeds for city use. Compare its stated weight with a fully equipped bike, including battery.
- Consider the C Line if you want Brompton’s all-steel folding-bike platform with the new electric system. A directly comparable current weight is not established in the cited product information.
- Choose the G Line if 20-inch wheels and broader terrain capability matter more than the smallest folded package.
Before ordering, check battery-included weight, folded size, gearing, local configuration and price for the precise build. Brompton says its Electric bags accommodate the battery and luggage, but bag compatibility should be confirmed for the exact model and battery. Brompton’s electric luggage and accessories information
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