now we're just needlessly designing a Tyrell IVE

I Like the Rob English bottom bracket idea. I am thinking we could adopt that. Just don't have an idea yet how the bottom bracket shell swivels.

SW, it would be great if you can add some dimensions to that sketch. Then we can pin geometry down. I was thinking because the Ti Swift works so well, we could use its geometry to design up a M60-like frame. (This morning on the way to work, I took off my longsleeve jersey, opened the backpack hanging off the saddle, put the jersey in and closed the backpack, all while riding no-hands on the bike path.)

It seems like a two piece chainstay (l/r) with a pinch clamp at the front right chainstay and a bridge anchoring the two pieces at the seat tube area... guessing extra bearings and an axle of some sort through the shell, with bb carried in the chainstays.. seatstay has pivots at the dropout so the seatstay can fold flat .. looks slick .. but I'm just hazarding a guess from pictures ..

We can't use the seatpost clamp idea if we want a suspension bush.

This thread is beyond ridiculous. It's page after page of me saying to the screen... "Shut up and take my money!"

I haven't seen anybody mentioned another beautiful bike by Tobike.



TOBike[h=1][/h]

you are right! we are over-thinking this but your f-frame design with the zippy or IVE suspension will work.

I would rather keep it non folding personally or at the least a seperating bike, i basically want the original design with a few modern tweeks, on the f frame rear fork, swap out the rubber for the nylon type block instead, keep it elegant and simple, front fork possibly like the Bridgestone version, or more modern with the nylon bushes like the new Pacific Reach, i want the option of racks front and rear in titanium or chrome, have the geometry like a sit up comfort style like the original but can change to drops or bullhorns if desired. 16" or 20" wheel options with room for a wider wheel/tyre option and would prefer high quality caliper brakes but have an option of other styles.

Also interesting, the Burke 8...



Underseat steering. Very innovative take on a folding bike.

Wow, interesting designs on this page.
That TOBike has two hubs I have never seen before.

These Burke guys have some cool stuff too.
This 8" screams endos aplenty but a slow speed race with these sounds fun.
I think they made it for fun since I doubt there would be many buyers looking for a ti bike like that.

funny that you should mention the Rob English bb. although i forgot to indicate it, that's exactly what i was thinking of when i made the above drawing. I would be happy to make a proper drawing of this concept with correct dimensions. Can you send me the drawing with dims you made for producing the Ti Swift?

Pm me an email address, then I'll send it there.

I think the titanium Hasa Minimax may have been on this thread but I didn't know a carbon version came out.
10kg and an established brand so it must be fairly durable.


I don't think anyone has mentioned FSIR either, they have 3 wheel sizes and look cool unfolded.
?? - FSIR??

That's impressive but I did the same a week ago.


As soon as I get out of traction I'm going to do it again.

I was atempting a no handed roll back on a bmx when the world was young. I got it wrong and the bars turned sharply hit my thigh and I push my thigh outwards to recenter them. Meanwhile I had spun round forwards and continued riding forwards no handed. Repeated this deliberately a few times but neither as well intentionally. Lol.

please put me on top of the list! looks like the dream titanium f-frame is on its way! go smallwheeler and jur!

i suggest a new thread to be created for this project.

Me too if i like it, has to look like an F frame for me to do that though, keep it simple and elegant, i dont want a folder version, and for it to have kudos with us real Moultoneers, quality components, exquisite touches, bling racks and a few options to make it into a workhorse or racer with a few things switched out!

I have discussed this on the moulton forums and the main questions regard the fact it may p off the folks at pashley who own the rights to moultons and also the durability of titanium as some say triangle ti frames are prone to snapping, but they seem keen!

FWIW, 4th FSIR model would, in essence , be the Montague 26" wheel from the looks of the other 3
Folding Bikes | Montague Bikes

i love this bike... in Brazil dont have this...
great picture

[/QUOTE]

Excuse me folks, this is my folder, made in Hungary, one off. The bike I like. I'd appreciate your feedback.
The specially selected position and angle of the hinge makes the two wheels to arrive next to each other in co-axial positions, that enables easy rolling when folded. For this the steering is fixed in a matching angle. Folding is light because you do not lift the bike up from the ground, but you use the wheels to roll the thing together.
Also, please note the seat frame closes down next to the chain stays during the folding.
So this is a 3D and connected folding.
I know the bike is rough and could be nicer looking. Maybe next version. This time I was focusing on the folding system and the geometry.
https://www.youtube.com/watch?v=8w6KqlWHE90

Wow, Jerry your bike design is very good.
It is similar to the Dahon Jifo but your fold is much faster and less effort.
I like that the rider doesn't have to bend over too much when folding.
I think you need to get it safety tested/certified before mass production.
I wish you the best of luck bringing it to market.

Surprised that it still weighs 10kg with carbon. My steel framed 2013 Bromton
S6L-X(6 speed, with factory and aftermarket titanium parts) already weigh less than that:

2013 Brompton S6L-X by 1nterceptor, on Flickr

[MENTION=293409]ttakata73[/MENTION], I have no plans to productionize. In fact I sold the IP to my employer. In its current form the frame is too flimsy, I cannot imagine it would pass EU load test. Last I did on the red proto was to put hub motor from Golden Motors, the so called Smart Pie. Happy with the torque and the KERS, but crappy PAS, can use it with thumb throttle only. And too many cables.

I like this 22" one:
https://brimages.bikeboardmedia.netdn...-bicycle01.jpg