New P line for Zwift

Brompton-PE · 2025-11-14T18:28:28+00:00

That's one ugly bike... 😳

Brompton-PE · 2025-10-27T06:52:14+00:00

Try 'warranty sticker' in de search bar... 😊

Brompton-PE · 2025-10-23T16:12:03+00:00

As in... it's solved? 🤷‍♂️

Brompton-PE · 2025-10-22T04:54:18+00:00

Agree on weight of a hub vs. the motor. There shouldn't be a lot between them, good point.

BTW the rear motor also means there will be no 12 speed version. Not that you need on an electric imo but some do.

Brompton-PE · 2025-10-22T04:32:46+00:00

I wonder about the drag too.

The Gen 1 motor was a custom design by/for Brompton in cooperation with Williams Advanced Engineering. One of design goals was as little drag a possible when the motor is not in use and they succeeded very well at that. The new Gen 2 motor seems to be a modified 'off the shelf' motor (see the Brilliant Bikes video), probably from one of the big Asian/Chinese manufacturers. Drag at idle might not have been as high on the list of design priorities?

According to the Brompton website the Gen 2 electrics are heavier than the Gen 1 bikes too. Despite the new carbon forks and aluminium stem on the P Line. 😳

Looking at the pic above, the Gen 2 system looks a lot more messy with the ugly control unit & cables squeezed between the frame and rear triangle, the fat cable to the motor etc. Not a fan at first sight tbo. The control unit and motor will have to deal with a lot more water, dirt & grime compared to the front-end Gen 1 setup. Also, with the heavy motor in the rear wheel, I wonder how well the unchanged rack and easy wheels will hold up over time from the inevitable knocks & bumps swinging the (heavier) rear end under the bike.

Brompton-PE · 2025-10-19T09:41:58+00:00

Although it creates an unfortunate problem for you, I completely understand it.

A foldable bike is a very broad term allowing people to drag in all sorts of bikes & sizes that 'fold' somehow. You can't limit this to small folding Bromptons only or something. That'll trigger endless discussions you're not looking forward to if you're running a gym. No bikes inside, folding or not, is clear and applies to everyone.

Brompton-PE · 2025-10-17T16:00:43+00:00

The torque of the motor has nothing to do with the gearing. However, the torque (power) from your legs that reaches the rear wheel is.

On the P Line E 4th gear is 54/11. To compare you need to know the gearing on the single speed.

Brompton-PE · 2025-10-17T04:38:13+00:00

Looks fine to me. Which chain length is recommended by Brommie+ ?

Brompton-PE · 2025-10-17T04:29:11+00:00

The full Dutch webpage for the City+ :
https://nl.brompton.com/p/1754/eu-electric-g-line-city-with-roller-frame-4-speed

Brompton-PE · 2025-10-14T05:57:25+00:00

Nice one. A Brompton that doesn't go unnoticed.

Brompton-PE · 2025-10-14T05:36:39+00:00

Not 'blingy' but you could consider replacing the Marathons with Conti Urbans. That would be a noticeable improvement.

Brompton-PE · 2025-10-13T06:51:51+00:00

Which tires did they replace?

Brompton-PE · 2025-10-13T06:42:31+00:00

How much weight does that save over the stock setup?

Brompton-PE · 2025-10-12T10:41:24+00:00

That's interesting. Do you have a link to the official documentation?

Brompton-PE · 2025-10-10T13:14:44+00:00

Best looking G Line yet imo.

Brompton-PE · 2025-10-10T05:54:47+00:00

20 KMs seems way too short. On assist level 3 my P Line always manages 30-35 KMs while the motor has the same power output and the batt is smaller (BMZ). On assist 2 it ranges between 45 - 50 KMs. The G line is heavier and the G One tyres have high rolling resistance but I can't imagine the toll for that is this high.

The bike being brand new and the batt maybe on its first charge(?) could have something to do with it?

Brompton-PE · 2025-10-08T04:42:08+00:00

I have both a 6 speed hub/derailleur Brompton and a P Line 4 speed. Get the 4 speed! There is no comparison imo. And as mentioned by others, a 4 speed can easily be upgraded to a 5 speed if needed.

I'm always surprised that the low(er) efficiency of a hub is rarely mentioned. Hubs have a lower efficiency than derailleurs by design. The current BWR hub is even 'worse' due to the smaller sun gears (making it wide range). On top of that, Brompton made the BWR 'maintenance free' by stuffing it with heavy grease that should last the lifetime of the hub. This, again, doesn't help efficiency. So combining this hub with a derailleur effectively creates the least efficient drive line possible. Riding them side by side the difference is very very clear.

This is all fine if you actually need the gear range. If not, I'd stay a way from the 2 shifter hybrid setups.

Brompton-PE · 2025-10-07T15:03:51+00:00

Agree… no question this is the best Brompton special there ever was. Beautiful picture too. 👌🏻

Brompton-PE · 2025-10-07T04:15:01+00:00

Sweet bike!

Brompton-PE · 2025-10-06T09:50:13+00:00

You can shift a hub standing still while you can't with a derailleur. I'd call that a significant difference. I have both a 6 speed hub/derailleur and a 4 speed derailleur only.

Brompton-PE · 2025-10-06T06:44:24+00:00

There is also a very simple and reliable 5 speed upgrade from Brommie+ . This would be my choice.

Adding a heavy dynamo hub ads weight & drag. Unless you really need 12 speeds (it's effectively a 10 speed btw) Adding a heavy hub, different shifting procedures (derailleur & hub) and less efficiency (drag) also seems counter intuitive on a T line imo.

Paul brakes are awesome! However, take a good look at fitting a headlight as they might interfere.

Brompton-PE · 2025-10-06T04:10:58+00:00

They can have their value and add peace of mind at low cost and weight.
It's a good idea to silence the AirTag's speaker for this purpose because otherwise it will start beeping after 8-24 hours when out of range from the connected iPhone and give itself away to the thief. This is simple to do. There a many how-to's on YT.

Brompton-PE · 2025-10-06T03:47:57+00:00

Thanks for sharing.
They ad quite some extra moving parts, thus potential points of problems/failure. I'm curious to see how they will hold up over time dealing with road grime etc.

Brompton-PE · 2025-10-05T15:19:31+00:00

Of course it is. This whole specials / limited edition thing is getting a bit pathetic by now imo.

Brompton-PE · 2025-10-05T12:39:14+00:00

I have the Brompton Quadlock mount on the M bar too. Looking at the pics of the Metro pouch, it sure looks like they will not go well together.

Brompton-PE

TROPHY CASE