Very bike fridayish.
Like the hook to catch the chain. Any photos of that detail please?

Official home page (GE cycles)
phantom

And another version X2 ISP

i love the flame-like lugs :-)

From the Gios mini velo lineup:



Hit the right arrow to scroll through the rest.

well... this gave me a nose bleed...

if you ever wondered what a moulton mkIII would like as it left the shop floor.. here it is - been in storage for 45 years:

Cool. I take it that you can fit 3 cogs on the 3 speed hub. Are they 10 or 11 speed cogs?

My old Cyclo 3 cog cluster , Made in the 50's in England Used an 1/8" Chain ..

Brompton 2 & 6 speed use the 9 spline Driver of a Shimano BMX devised standard .. equal splines

this looks like its got the wide narrow splines of regular Hyper glide cassette driver s https://secure.flickr.com/photos/elieser74/13990802776/




S-A S3X threads the spline tips .. so its a regular English freewheel /adjustable cup /bb thread. 1.37"

from the guy who owns the canada bling brompton:

"use 10 speed cassette 17, 15, 12 with spacer and modify shifter"

and if you want to spend 400usd on a titanium version, there's this.

https://www.bike48.com/product/2-6-sp...ssette-system/

Ahhhh ... thanks. I looked at the Flickr photos more carefully and saw that he did respond to another person.

That's pretty cool. Playing with a few combinations, it makes a big difference IMO to the available gearing options. With only three cogs on the rear, it would be pretty easy to frictino shift the whole thing. At least, that's my strong prior without actually trying it on a Brompton derailer.

It is impressive... I toyed with the idea to implement something like that on mine, then decided against it as 10-sp chains are actually a lot more expensive than 8-sp ones. So on that I decided not to pursue it. I have other gearing option ready to go when I need them for loaded touring. For commuting, 2-sp all the way.

I recall you writing about a 5 speed hub but that there was something outside the driveside dropout. I've seen a few photos but don't recall anyone discussing the driveside thingy with respect to the fold.

Using Sheldon's calculator and the Sturmey Archer Brompton special wide three speed hub, 12-15-17 and 13-15-17 cassettes seem to produce a decent spreads. One would still have to do a double shift -- IGH and derailer -- to smoothly move up the gears; but I'd think that the additional range and choice with the rear cassette would make it less frequent.

The 5-sp hub looks exactly the same on the outside as a 3-sp one. So that is my one option for extended gearing. I also have a Schlumpf speed drive, giving 20 somewhat overlapping gears. Not sure if I would ever use that combination though. The Schlumpf is a first step to giving 2 lower gears with a smallish chainring, say a 38t.

the swift swallow prototype:

Dat chainring.

minute city bike:

brazed steel frame made in belgium
406 wheels; two speed sturmey kickback w/kick brake
13kg
euro: 695

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BE•ALL BRS-700 SV

alfine 11 with the patterson cranks. i wonder how well that works and what the ratios would be.. overlap? hmmm..

Geared low for sure.. with over 400% range of the Alfine11, no real need for the Patterson... and you gain only 3 lower gears below 26 g/i over running a single chainring.. other than the 'coolness' factor, I don't see a good reason for a two speed crank's added weight/complexity/range in this application..

Yeah,those are some crazy low gears. I think a 3pd hub would've been a better option.

My thoughts also .. I've got an old Sachs Torpedo 3spd that I'm putting in a Moulton project.. I keep wrestling with installing a SpeedDrive in it .. only because it is staring at me from my old Jetstream XP... I'll probably just run it as 3 spd and see what hill I can't get up..

Sincir folding bike??

this thread seems ro be a reasonable place to ask about rare folders. i spoke to a women you said she had a bike just like my birdie. i thought she was talking rubbish at first and she had some cheap folder, she hadn't used for 10 years. i asked her the bikes brand and she replied "sincir" or something spelt similar. she didn't mean a a sinclair a bike. it cost about 500 pounds 10 years ago. it also wasn't a strida, or swinn.

any ideas?.....
can't find anything on internet.

Yea , the Patterson metro chainring is a 28t , overdrive it acts like a 45t (Reading the data)

110 spider speed drive a 34 t acts like a 54 in overdriven gear.

not as tidy looking as that Cast arm.

The Philippine-made Nyfti folding bike reminds me of this. or should it be the other way around.

So,you have to pull the seatpost out and stick it in the underside,then carry the pedals and front rack? I think they need to go back to the drawing board.

Yeah, this F16 seems overly complex and heavy.
I think just one fold like a Dahon is good enough but its always nice to see new designs.

dahon boardwalk

panasonic lightwing

dahon piccolo