Made my move to day !!...

But overall 2015 models cosmetics looks real good!!

Well, if your existing crank is one piece, you won't be able to mount a second chainring, hence the necessity to put in a new crank. How much? Depends on what brand and it may also involve changing the bottom bracket....

Are you running out of lower gears?? Which gear do you use most?

Sifu E may have something to suit?

Vigor P9 comes with 130 BCD chainring if I'm not mistaken.

Yea.. Will I be compatible? And just screw on right? Quality wise is this chain ring okay?

Hi all,

I need guidance here.

I have an upgrade target for my Vigor P9, eventually having either 18 or 20 speed.

But I like to do it in stages, first changing the RD shifter, then RD, then adding 2nd chainring and FD.

While upgrading in stages, I also don't want to change the upgraded component as I go. For example, I want to change my RD shifter first, so I need to make sure the RD shifter I get will be compatible with all future upgrades of other components.

Therefore, I have questions as follows:

1. Will a 10 speed shifter, say a Shimano Tiagra 10 speed shifter works with my current 9 speed Neos RD and 9 speed cassette?

2. Will a 10 speed RD & shifter, say a Tiagra 10 speed shifter and RD works with my current 9 speed cassette?

Thanks in advance! 

Best to save your money and then do the whole upgrade in one go.  Why? all the compatible components are installed at once and the whole thing is then tuned to operate smoothly. 

I don't think the Tiagra 10 speed shifter will work with the Neos 9 speed RD.  Tiagra 10 speed RD short cage will not work with your current cassette.

Enjoy the ride on any bikes that you own. Leave the upgrading as secondary as the process will never end.

I can understand the reason for upgrading in stages as I did the same. It is easier to actually get a high spec bike slowly as what I wanted will cost 6k if I choose a Dahon with the specs.
Sadly, you can't upgrade the way you mentioned as Tiagra 10 speed shifters are not compatible with a 9 speed RD. If you want you have to get the whole front modded and then the whole rear modded at once.
So I can suggest going for 9 speed.

That way. You first buy a 9 speed shifter, bear in mind, SRAM and Shimano are not compatible. Also road bikes and mtb has different shifting index length. If you choose Tiagra or 760 shifters, these are road bike flat bar shifters so mtb RDS are not suitable. But if you choose mtb shifters, you can use road bike RDs as long as your cassette don't exceed 30 teeth as roadie RDs has short cage.

So start with say 9 speed Alivio or Accera shifter. That way you can still use the Neos RD and then later change the RD.  Then later add a chain ring to the front. This way if you ride hilly area, just shift the chain manually by hand to the smaller chain ring. Then later the FD and adapter and finally you have 18 speed which is sufficient for Fraser's Hill if you are on mtb set up at the rear. The front is always roadie 53/39 set up.

Thanks PaulKong brother for sharing the knowledge.

I most probably will go for Dahon. But up to this point i still can't decide to get Vigor or MU D8 or Speed D8.  Price around the same.

Was shortlisted Vigor & MU but saw many rider here own Speed and give very good comments on Speed.

So ................................. Pening     
hhahahahhaa

Thanks whateva2k ... !! Thanks !!!!     

What is the 1st change/mod to make Vigor a better bike ?

Should i go for lighter seatpost & comfort saddle 1st ?? or add crank / upgrade FD ? Or ???
In order to understand and communicate with you all here. I need this dictionary   

Very smart advice and likely to put bicycle shops out of business!  LOL