For those interested on how the rear derailleur adapter works !

The rear end of the Boardwalk. Also can be used on Dahon Dash 2013 models. Can be adapted to Tern Links but the adapter needs the quick release to hold it tight as the Tern lacks a securing bolt.


The adapter secured onto the frame via the Neos RD mounting tread and also another securing M4 allen nut (same as bottle cage nut)


The rear derailleur attached to the adapter.


The Dahon Speed on the other hand has already an RD hanger ready! Note also the Neos RD mounting tread.


Components needed for the front multiple chain rings installations. From top left-clockwise. Shifters, longer bottom bracket, the dual chainring crank or triple in some cases, the FD adapter for Dahons and Terns and those
same sized seat tubes and the front derailleur. Off course the extra cable and housing.


How the contraption looks like after installing.

Yes, you can. Because KHS don't use the short cage Neos RD. It uses the Shimano 8 speed RDs and I think the cage is long enough to accommodate the extra slack on the smaller chainring. It also uses the clamp on FD which is even cheaper as you don't need the FD adapters. I think the microshift FD for it cost about 50 to 60 bucks only in your case. The dual crank + FD + shifter is already enough in your case. The cost is about RM400, give and take another 50 bucks. Most definitely nt o RM800 as said! 

thing with knogg is all uses internal batt....
batt kong... how...? can tapau 
and the price.. $$$$

but brompton is not cheap too.  how much?  > 7 to8 K ??
something like this may fulfill some.....
http://www.flickr.com/photos/mybikeshopsg/10229633445/

You are right...  not easy for manufacturers to sell too even if they can come up with such a model and their decisions would normally be based on business viability, that is, make whatever that can sell at a profit.  Right now, most people will go for the 20 inch bikes rather than 16 inch.  The 16 inch looks just a little bit too small in comparison to average height people, while the 20 inch wheels does not look too out of place for adults to ride, instead of children.
I may have something in a month's time...  keep a watch out...

it feel great on the 24" compared to 22"

I am 53 and weighs almost 100 kg. So, I guess I cannot afford to ride cheaper foldies. At least Dahons specifies that it can take 105 kg while most others dare not specify. I am also a slow rider, imagine carrying 2 bags of cement wherever you go!  Anyway, I have ridden on a lot of routes and the furthest and toughest is the Hulu Langat to Titi route, to and fro. To explain it, a foldie is actually much easier to ride than the other 2 types, namely MTB and roadie. A foldie which has smaller diameter wheels climbs easier than the bigger wheel bikes. Main disadvantage of the foldie is off course the lack of gearings which I have successfully manage to overcome by modding to 27 speed and that plus the smaller wheel is actually easier to ride albeit slower. A roadie is off course much faster because of the larger wheels and also smaller width of the tires. But it needs very strong legs to pedal.

They tend to be hard to ride because most riders start with the least gears! I see 7 or 8 speed is common. So, when they start, it takes a lot of effort but they do give good training though. Eg. when I started with 7 speed Eco C7, I practically use all the gear range when riding in Putrajaya lakeside. As I ride there twice weekly, by the third week, I use only 3 gears and now after a year plus, I don't need to change gears at all. That doesn't mean I use the highest gear ( 53T in front and 11 T at the back). I only used this for downhill pedalling and on flats it's the 3rd gear. Some can pedal the highest with no problem but I am old already. With the 3rd gear and a cadence (crank rotation per minute) of about 65 to 70, I can ride 20kmh on flats. 

Velo is a faster bike as it is supposed to be a mini roadie. With the right set up, it can actually catch up with roadies if you are strong enough. The only advantage of a velo in your case is probably the weight. Velo is much lighter. Don't worry about your KHS, it is strong enough to handle the few bumps. So far I see my fellow riders on KHS, none have any complaints.

48T is usual for Boardwalk but usually single cranks uses 53T. The common ones are 53T/39T which is enough for me even for Fraser's Hill ride. Most definitely single chainrings are smooth shifting and expect a little chain rub when you mod to dual chain rings especially on the last extreme ratio. The front derailleur cage effectively acts like a chain limiter when installed so chain jumps are rarer. Chain drop might happen if the limiting adjust screws are not properly adjusted. (like the RD, FD also have 2 screws to limit the travel of the cage, inside and outside)

48T means your crank doesn't have the 5 screws holding the crank to the chainring (or 4 screws in the case of mountain bike crank). That means you have to buy another set.

i have a dash p18, don't expect it to have road bike feel cos it is still a small wheel... 

road bike wheel 700C, the handling n ride quality is different...

if u r a heavyweight, mebe u will feel it is more 'solid' compared to normal folding bikes with long seat post n handle post..

folded size is big, so not for everyone.... 

Many others actually. The Dahon Vybe is within reach and so is the Tern Link C7. If you are looking for better climbing ability with the same budget, maybe a Java Fit 16 speed but the wheel base is short so, the bike is fast but not stable. I don't usually recommend cheaper bikes as their frames don't last and it gets quite irritating to ride a bike that squeks and creaks. That's why frame quality is important. Component wise, you can later upgrade it. If you drive to Rodalink opposite the Aeon Jusco in Bandar Botanic, Klang, you should be able to see one that you like. Most probably see one that is over your budget, hahaha.   

Another good bike to buy is KHS. The range starts from 1.3K for an 8 speed but for that I rather go for the Boardwalk but who knows, you might like the design. There's another way to go though. Raleigh makes strong frames but their marketing strategy is to sell it cheap so their component is lower grade and it's only 7 speed. It's selling for RM750 but if you add in another RM600 to upgrade to 10 speed, it's enough for some hill rides. But I think you should go around and just check out the bikes first, pin point the models that you like and then ask for opinions here. 

PS/ Actually there are many riders who gives up after a while and they sell their bikes after getting bored with riding. Check out the site. For this I advise to stick to Dahons, Terns and KHS.
http://www.bicyclebuysell.com/

compare your leg too..

Are you able to pedal at the highest gearing? 53T in front and 11T at the back. If you can pedal on that ratio at 90 to 100 rpm cadence, maybe you can catch up. When you say, you pedal furiously and still cannot catch up means you are pedaling at a lower gear than they are, even the Birdys and Oris. Practice riding and increase effort as you progress. Maybe now, you are comfortable riding 53T/15T, maybe a few weeks later when you pedal effortlessly switch down to 53T/13T and then finally 53T/11T. But me an old man, I can only pedal effortlessly at 53T/14T and once I go higher, it becomes too tiring. We are tallking on flats. Also bear in mind when you want to breakaway, how long can your legs sustain more effort on the pedalling. You see others pedalling light but actually they can push or pedal harder than you are able to so they don't need higher cadence to overcome you. They just use higher gear.

FYI, a difference of a single cog at the rear can actually propel another rider 99 meters faster a minute, ie they pedal at the same cadence. Here's how you calculate ;

  teeth in front (53) divide by teeth at the rear (11) multiply by the circumference of the wheel (406 cm for 20 inch) , this is the revolution per crank. Difference between 11T and 12T is about 0.41 turns which is 166 cm difference every turn. Multiply by 60 minutes and that's 99 meters. Shocking, isn't it? 

kcwo where u stay?

You got the right attitude and that's just like me but you don't get to join a lot of group though. I have a riding kaki, we ride every week,sometimes twice  a week. Then one day, he broke his promise and was absent from a ride. He got angry when I showed my dislike by calling him Boeing and Airbus. Since then, we never ride together again and every member of the group joined him because they were fast riders! He have even bought road bikes! So, me and wife have to join another group. You can ride fast and you can ride slow, but most riders cannot tolerate slower riders unless you join the right group. Especially when you ride in Kesas which is considered a fast route, most riders want to ride fast! For slower rides, join the makan angin ride like what I do most of the time. BUT be prepared to spend the whole day.