2 to 3 speed

[bikegang]

CNC suggests aluminum. Is that correct?

No. It's some kind of steel. JIS G4105 SCM415 Cr Mo steel ?
Will know more after they provide the sample and spec. Should be soon after Chinese new year.

 

[12boy]

Looking forward to hearing more...thanks, Ron

 

[Kell]

I actually might be interested in this to covert my 6 speed.

 

[Tenkaykev]

Me too,

I'm running a 10 speed chain on my 6 speed CHPT3 ( only because the chain is red and black like the bike.)

I was told there would be problems shifting, I twiddled the adjuster and it shifts OK, although I do have to hold the shifter for a few seconds when changing up, changing down is immediate.

 

[bikegang]

Sure would...sweet ratios and an unobtanium 11 tooth!

Sorry about the wait, it's into surface treatment stage now... should have it soon.

 

[12boy]

I am waiting eagerly.

 

[bikegang]

I am waiting eagerly.

After laser engraving label and we are done ...

 

[Nufab]

That looks awesome... will that fit without having to file or bend the rear triangle? Will it come with a shifter, or can the 2-speed Brompton one be modified to 3-speed?

 

[Tenkaykev]

After laser engraving label and we are done ...

View attachment 504337

Looks great, I'm certainly interested 👍

 

[u_i]

Cogs wear off together with the chain. The question will be of the cost and durability. On a bike used regularly the cassette will need to be changed at least every 2 years and maybe every year.

 

[12boy]

Bromptons and other small wheeled bikes run through sprockets, especially small sprockets much faster than 700c bikes. It would be good to be able to replace them individually.

 

[bikegang]

That looks awesome... will that fit without having to file or bend the rear triangle? Will it come with a shifter, or can the 2-speed Brompton one be modified to 3-speed?

Yes, the idea is plug and play. Compatible with all exisitng stock parts (Frame, hub, tensioner, jockey wheels ...) Not chain though as this set is better with 10 speed and up chain. And you need a 3 speed thumb shifter.

 

[12boy]

I'm thinking any decent friction shifter would do.

 

[u_i]

Yes, the idea is plug and play. Compatible with all exisitng stock parts (Frame, hub, tensioner, jockey wheels ...)

So what about the chain guide disc? Depending whether I keep it or not I use different spacers between the cogs and if I use the disc I must trim it. If the disc is not there, it is easy for the chain to get stuck between the largest cog and hub on a folded bike. Somehow the reality I see is not as bright and clear as yours .

 

[ukoldschool]

What? why are you over complicating this. Nothing on the front chainring will change.