P line 1) Easy wheel extender. Required on all brompton. Number 1 mod as it adds a lot of stability with just little bit more weight. 2) P line specific can be modded for 7 speed. That will give much better range. The current range is similar to the A line. You can fit 11 to 21 in the stock wheel set, use rear derailleur like ruhm. 3)ditch the tpu tubes. They don’t make a huge difference in speed. Actually none, just difference in acceleration and deceleration. But at the cost of a rough ride and higher punctures.

Since I met & married my wife almost 40 years ago we have been back 4 or 5 times. I think a Brompton would be ideal for hopping on & off the ferries to explore the islands in the harbour.

Nice additional to the Brompton P.

Very nice. Love the detachable pedals and ergonomic grips.

Thank you for the video. I tried using the H&H dual chainring 54 and 33 tooth on the p-line. Unfortunately, the jump in chainring size is too much for the p-line Derailleur. The chain derails (no pun intended) in the back on the derailleur. Probably could use a smaller dual chain ring so that the chain ring size difference isn’t so large. I’m going to try a 45 tooth ring first in the front. And I also have the H&H 40 tooth chainring if the 45 isn’t enough. I know H&H has a smaller size dual chainring 44 and 31 tooth. Anyway, it’s fun experimenting. Thank you for the video again. Patrick 😊 Update: I was able to get the H & H 54/33T dual ring to work on the stand. You have to remove the chain guide, and also I changed to the 10 speed KMC chain instead of the Sunrace. It is a bit heavier but seems to make a difference keeping the chain from binding up in the derailleur. I also am running 104 links instead of the 106 that is recommended for 54T ring by Brompton. Will see how it goes…. If you’re doing the “foot-step” shift to the 33T on the H&H, I recommend not going higher than third (3rd) gear. The chain will rub on the frame. My understanding is that this 33T is for the steepest of grades, and you would likely be staying in first or second gear anyway going up the grade.

I bought those same grips from REI. They are awesome!

I downsized the climbing ring of the triple on my Catrike Expedition, wonderful difference. I really like that detachable pedal you showed.

Thx for the video! Do you recommend the P or C Line for someone's first Bromp?

Hello; I have a CHPT 3 V4 and I am going to change it from a 4 speed to a 6 speed because where I live there are plenty of hills. I also changed the pedals and I bought a titanium seat post which I have not yet installed.

For hills I added a 53/39 double chainring. There's no front derailleur so have to manually switch chainrings as needed, lol. Most of the time, I'm on the 53t.

great videos

Those Ergon grips make a huge difference

My exact same changes too.

What did you think of my upgrades? Am I missing anything? What have you changed with your Brompton? Where do you want to see me ride in Hong Kong? Remember to check out all my other Brompton / HK Videos, I'll be here til early February.

Very smart 👌

Found your channel, I’m interested in brompton bike. We just got back from London and saw brompton there. I live in seattle as well

Those pedals are very chic, but would not be *legal* in the UK. They do not have front and back-facing *yellow reflectors* that our laws require. Now, whether you would be pulled over for NOT having such pedal reflectors in the UK is a different matter. Indeed, I think the omission would likely be overlooked as not important, if the other nightime running lights and reflectors were in place on the bicycle.

Are the better bearings in the new pedals noticeable (less friction when pedaling) or is mostly just the fact that they’re lighter? Where do you keep the detached pedal?

Interesting bike never seen anything like that before. Is this is custom made?

Do you regret getting the p-line over the c-line for the climbs? Im getting a p-line electric and even though the motor will do most of the work, I'm still worried that I should've gone with the extra gears on the c-line for Seattle.

Hello my friend, can i ask you where did you buy your new pedals? Thanks in advance!

I changed my front chainring to 46t and 21t rear without shortening the chain.

How much did changing the gear ring impact the top end speed? 👍

Can consider tyres next. Continental contact urban is my choice. The schwalbe marathon racers are simply too draggy. High rolling resistance 😅

U shud change the sprocket by using 21 instead of 18..changing from 50t to 44 will cause overcadence

ask the shop to cut your bars