I changed my saddle to a Selle Royal Gel and it still didn't help much. Finally added an "el cheapo"  gel padded cover which I transferred fr an old MTB and I cud ride for an hr without much problemo 

I have one of these chain cleaner device.  Works well, happy with it.  Don't need to waste a lot of degreaser.  My chain comes out really clean!

Yes, but that's my wife's mini velo. The Performer is rigid chromoly frame and very light. After chnaging to Ultegra groupset, it is below 9 kg. Originally it was a straight bar and I change it to a bull horn bar or what they call TT bar. Compared to the Dash, the Performer is a better ride but Dash is foldable but Performer is not. The Dash is an X20 now and I use it for more shorter and tarmac rides. Long distance, my wrist pains after 80 km. For distances longer than that or multiple day riding, I use my Dahon Speed.  Orang tua cannot always bend the back bone lah! Too back breaking to ride hunch down all the time.

It seems the Dahon Dash is priced near 3K now and they have reverted back to C-brakes and 451 wheelset.

I would say M.  Best to give it a try.  You may have a longer torso/shorter legs or the other way around.

You are riding a Vybe right?  Is your seat higher than the handlebar?  If not, you are sitting in a more relaxed upright position already.  Is the saddle pushed too far back?  Make sure it is level too and not angled.

Bro..would you be interested in a pre-loved Dr Hon Dash P18 2013? Bought it sometime in Jan last year but couldn't give it much love as most of my riding time is spent on my other bikes (Birdy Deore LX/XT - folding, Cervelo One - rb, KHS Alite 1000 - mtb).

I'm thinking of putting it up on BBS but would settle for a quick sell if there are offers. My asking price would be RM1.8k negotiable with a few accessories thrown in (Topeak Bar n' Mirror bar end, Wellgo M111 QRD pedals, Avid FR5 brake levers-not yet installed).

The Dash is gathering dust now as the rear tube is punctured. Condition is 9/10 with some minor scratches and paint chipping plus wear & tear. Would post pics of the bike but I don't have any recent ones. The only one I got is the pic below from May 2013 of me riding it in Avanti Pahlawan Charity Ride (pic courtesy of Mr Sin Tai Lim's blog - Happy Happy)

[attachmentid=4304962]

I'm currently outstation and will only be back in KL on Thursday. Can meet up at Desa Park City as I live near the area. Do PM me if you are interested!

Well, did your back hurt before you raised the seat?  If not, that's the answer.  That sifu way sounds right, but you may not be as flexible perhaps.  I would try lowering the seat an inch and see what happens.  If that works and you may even want to get yourself an adjustable stem.  That way you can have the seat height correct and increase the height of the handlebar so you are more upright.  I'm no expert, but that's how I would tackle it. 

Already replied your pm. So you'll have the first right of refusal of my Dash then before it goes on bbs. Cheers bro!

 
from guan chows' website...

http://gccycle.com/index.php/product/dahon
if the only dahon which has double crank is the 2015 dash

isn't it stupid?

since more than 4 years ago, when dahon is getting popular here,

the distributor lerun refuse to take in

bikes which has more speed and normal folding bike frame,

ie vitesse p18 etc,,

until last year? finally visc p18... which is the fugly version

now tarak liao?? 

so sure loose to those java etc etc .....

I might be wrong but I think the rims are from a model of Birdy bikes which uses 18 inch wheels. So, it is neither 406 nor 451.