781 T line Project - Installing H&H Parallelogram for Smoother Shifting and Lightweight Performance!

Unlock the full potential of your Brompton with our guide to upgrading your stock derailleur to the high-performance H&H from 2 to 7 Speed Parallelogram Derailleur. Not only does this upgrade enhance shifting precision and smoothness, but it also sheds weight and upgrades the build with its durable alloy body, replacing the original plastic components. Follow along as we walk you through the installation process, empowering you to enjoy a lighter, more responsive ride on your Brompton. Don't settle for standard when you can elevate your cycling experience with this essential upgrade!

[@stevenheng3336]

Ya I am happy with hnh products now..

[@781BromptonPremiumParts]

yeah us too

[@bengt_axle]

The lower jockey wheel of the cage is so low to the ground, it seems like it would be easily damaged rubbing up against a curb or going through a pothole. Need Pinion.

[@781BromptonPremiumParts]

Actually it is not lower than the original yet as we have not change the original chain, it will be lower than the original once we move to 7 speed as it needs longer chain to accommodate bigger cogs.

[@rrameshnaidu5813]

Awesome mods

[@781BromptonPremiumParts]

Thanks Ramesh

[@MrJofArnold]

Also just to be picky; the H&H derailleur isn't entirely CNC - the front bit is plastic.

[@781BromptonPremiumParts]

Thats true, made with engineering plastic material but honestly we dont find any issues with it, as we know that their after sales support is efficient.

[@MrJofArnold]

@@781BromptonPremiumParts Thanks. Yes Shimano uses filled nylon so in principle that's ok. My question with these kinds of designs is always tolerances and wear; Shimano as I say uses nylon but they also often have bushings and the parts are very very precise with no movement. Still, in any case what I'm thinking is I should get rid of my RUHM and get a H&H.

[@sandydennylives1392]

From non working Brompton external 'gearing' to working external gearing? Count me in

[@kavanobrien6547]

A belt drive system would be good.

[@781BromptonPremiumParts]

It could be a nice option but belt drive means internal gears then you might be limited to 3 to 5 speed.

[@kavanobrien6547]

@@781BromptonPremiumParts Alfine = 11 gears , Rolloff= 14 gears.

[@781BromptonPremiumParts]

@@kavanobrien6547 yes but you need to have a custom Brompton rear triangle to fit those as it will not go to a regular Brompton triangle.

[@kavanobrien6547]

@@781BromptonPremiumParts Yes I know about the triangle , Strange why Brompton haven’t got in touch with Rolloff to get them to produce a hub that could fit exciting and past triangle = 100 thousand bike made each year and a million sold so far = pretty sure Rolloff would see it as a massive opportunity.

[@MrJofArnold]

What do you think of the H&H derailleur? I have an RUHM and it is badly made - bad bearings and very loose :(

[@781BromptonPremiumParts]

H&H has been producing quality parts for some time now, we trust the brand, their derailleur with the double tap shifters are well made and functional.

[@naviivan130]

Can 12speed tline explore with 4 cassette convert to 7speed cassette? Does it mean will remove the right hand shifter? Thanks for the answer

[@781BromptonPremiumParts]

Yes, you can convert the external 4 cassettes with 7-speed cassette to convert it from 12 to 21 speed, you will replace the LEFT shifter to a 7 speed shifter, available with H&H and Minimods.

[@davidhunternyc1]

When I buy a Brompton T-Line, should I get the 4-speed, not the 12 speed, since I want to customize the bike with H&H Parts? I have a feeling Brompton Junction will not switch out the OEM parts for me though. I have no clue how to work on a bicycle and I live in a small studio apartment too. Also, is that a 62T chainring?

[@781BromptonPremiumParts]

If you can get the single speed David then that is much better as it is cheaper compared to 4 and 12s if the plan is to upgrade it with H&H

[@davidhunternyc1]

@@781BromptonPremiumParts Great suggestion. Thank you.

[@memo6x9]

​@@781BromptonPremiumParts if I buy the single speed and use this customized 7-speed kit, do I need to change the original single speed bicycle chain as well? Or can I use the original chain? What else do I need to have to install this kit when I purchase single speed T Line model?

[@781BromptonPremiumParts]

@@memo6x9 you need to replace your chain a new one, it needs to be longer than the original single speed chain.

[@memo6x9]

@@781BromptonPremiumParts how long should the chain be?

[@memo6x9]

What is the total net weight of this 7-speed kit?

[@781BromptonPremiumParts]

😁sorry you have to watch the full video for that lol

[@haolinchen8982]

The bell is missing😂😂😂

[@781BromptonPremiumParts]

Good eye, wait for the upcoming videos Hao

[@memo6x9]

​@@781BromptonPremiumPartsis the bell included now? Or can we use the original bell on it?

[@781BromptonPremiumParts]

@@memo6x9 H&H will have the mount that you can use your original mell on it.