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 Folding Bicycles v4 - Not only Folding Bikes, Folding bicycle discussion

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desastar
post May 17 2015, 08:19 AM

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QUOTE(anykti @ May 16 2015, 03:25 PM)
Lol, so out liao, hahaha!
[attachmentid=4449988][attachmentid=4449990]
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I think this bike is quite serviceable. Old 105 gears but it should be quite good once you clean it up. Ditch the old tri-bars, change the cables and put on new bar tape and you are ready to go. You may need new tyres and tubes. I have two bikes around the same vintage and I love them.

Easy couple of hours and you'll be riding!

If you want to sell it, let me know how much you want for it.

This post has been edited by desastar: May 17 2015, 08:25 AM
desastar
post May 20 2015, 06:43 AM

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Hi guys,
I'm most likely going to put up my Dahon Vitesse 10 speed for sale, which can be modded to 20 speed by adding a FD and shifter, simple.
You will have to wait until July before I'm back in KL though... PM me if you are interested. This bike is currently under 10kgs. Unfortunately due to the components, it won't be under RM1k......
biggrin.gif
desastar
post May 21 2015, 06:43 AM

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Etigge situ
That is a very nice colour. Why did you not powdercoat instead? Much stronger I would have thought? In any case that is much nicer than white. Pity it doesn't suit you. Some bikes are like that I guess, that's why we need lots of them! 😁
desastar
post May 23 2015, 08:05 AM

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Bromptons are worth buying secondhand. Why bother with an imitation if you can have a real one. Resale value would also be better. If you can find a good one at a decent price, buy it.
desastar
post May 23 2015, 01:19 PM

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Fair comment Sifu. Just that I hate copies that are neither better in design nor function. That's probably why people go for Dahons or Terns. I would too!
Here's the real thing on a nice Melbourne morning with a BF Travel Tikit.

user posted image

This post has been edited by desastar: May 23 2015, 01:33 PM
desastar
post May 23 2015, 03:10 PM

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Yes you definitely need hard baskets. Your dogs will suffer in that! Mine will never sit still long enough to go riding! Lol

This post has been edited by desastar: May 23 2015, 03:10 PM
desastar
post May 25 2015, 06:29 AM

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QUOTE(H2D @ May 23 2015, 09:53 PM)
bapak hon stil haven't decide the final version of curl gua..

this seems to be the latest pic i can find....

think they will go with the humpback version, when folded got space on the top tube

for hand to grab.
user posted image
Hmmm.. I see that as another "copy" of the Brompton. Perhaps no one has come up with a new way to fold a bike hence all design revolves around the fold. This humpback design looks like it has a weird geometry, with seat post angle like that!

Presumably this is also with hub gears?
desastar
post May 26 2015, 09:17 AM

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QUOTE(H2D @ May 25 2015, 04:40 PM)
yea, just my suggestion for him to train towards 160km... to avoid sudden big jump from sub 100km....  biggrin.gif

anybike can ride any distance that is not an issue.

but.. u gotta set a time for yourself, then oni can be challenging mar...

can u finish 160km in 6 hours? ... on a brompton ? haha,. of cos u can.. tht u have to test yourself....
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26km/hr is not that slow. To do 100/160km on a Brompton? No thanks, I've got a better road bike for that. Haha. Why suffer? I salute those who will make the ride on 14inch wheels!!
desastar
post Jun 6 2015, 05:41 PM

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Sh*t !! That's not good. We take it for granted that nothing will happen when we go riding. I wonder if welding on aluminium frame is not as strong as steel? Best stick to the models that have been proven eh?
desastar
post Jun 6 2015, 08:33 PM

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QUOTE(etigge @ Jun 6 2015, 06:21 PM)
When aluminum is welded, it weakens the metal and to get back the original stiffness, they need to go for heat treatment. Nowadays, most bike frames are made by the small number of contract factories and most probably the last heat treatment process is omitted. Unlike expensive frames, cheaper frames contract are quite competitive. My guess is, those frames are OK if used the normal way, on that last case, a caucasian rider is usually much heavier than Asians and probably he was jumping down kerbs as well, who knows?  hmm.gif

Here a write up about aluminium weldings.

" Unfortunately, there is not a practical way to reintroduce the stiffness into the base material of a fabricated part after it has been reduced by heating. In theory, strengthening the effected material by strain-hardening or heat treatment could be done, however, because of the procedures required to perform these operations, it is not usually an appropriate option. Strain-hardening is achieved through controlled physical deformation of the base material, which generally involves a reduction in the cross-sectional area. Heat treatment to improve mechanical properties generally involves heating to a very high temperature followed by quenching in water and then controlled reheating for a further period of time. Post weld heat treatment of aluminum alloys is used in some specialized applications, however, there are a number of major considerations such as distortion of the fabricated part as it is heated and cooled through a very wide range of temperatures, practicality of physically heating and cooling the entire component and the cost involved with this elaborate procedure. "

Safer to ride chromoly or Reynolds steel, huh?  whistling.gif  I am also curious Tern does not have even one model made with chromoly.
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I have a personal preference for steel anyway. All my bikes are steel framed except one Dahon. It is scary just thinking about it. Just as well the cheap foldies coming out of China are plain steel.
desastar
post Jun 8 2015, 06:19 AM

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QUOTE(Jay Chua CC @ Jun 7 2015, 09:16 PM)
This way i dont need to change or purchase new shifters? hmm.gif
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You could use bar end shifters and possibly re-use the brake levers along the straight section of the bar. So you brake as per normal but shift at the end of the bull horn. Would be a cheaper setup if you really want bull horns. Won't make you go any faster, lol
desastar
post Jun 9 2015, 08:40 PM

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QUOTE(o.d @ Jun 9 2015, 12:16 PM)
thought so, looking at the handle and shifters, I also don't know how to operate that tongue.gif
» Click to show Spoiler - click again to hide... «

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Folding bikes and mini velos are generally ridden for fund and of course when you do not have space for a full sized bike or need to take on trains or buses.
If your needs are none of the above, so full size as they are generally more comfortable when travelling longer distances and their geometry makes them easier to climb as you can properly pedal standing up.
You can do it all using a foldy but it is generally more difficult. With your budget you are likely to end up with a foldy that will be on the heavy side and not the best drivetrain.
If you must have a foldy, buy the best you can afford and if possible one that you would not need to upgrade components.
If full sized bikes are ok, do not dismiss older bikes as they can ride beautifully, though you won't win the fashion stakes! The older cromoly steel frames are lovely. Best value I found would be those from the 80s, as they are still modern and can still get parts easily.

desastar
post Jun 11 2015, 09:44 PM

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QUOTE(o.d @ Jun 10 2015, 09:50 PM)

thanks for your answer desastar. I still have 50-50 on foldie as I have to choose to carry or not to carry onto LRT, if I will not, I plan to cycle all the way to office which I will want a full size bike. Regarding oldie bike, I don't mind fashion at all. so, do you mean, look for the used chromoly ones and do they have gears or i can ask bike shop to modify for me to have gears?

thanks everybody for advices  thumbup.gif
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The older ones are mostly cromoly steel and they ride very nice. These ones are usually 12 or 14 speeds and above. The more modern ones will have a 7 speed cassette instead of freewheel, so upgradeable. They are also with downtube shifters. Don't know how easy it is for you to buy one though...
desastar
post Jun 12 2015, 07:06 AM

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QUOTE(etigge @ Jun 11 2015, 10:58 PM)
As for used Terns and Dahons, those dreamers usually sell them at almost the price they buy  rclxub.gif  Might as well get new ones.

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Now this is an interesting one. I'm curious from a seller's point of view, what is the expectation of the buyer. When offered a near new bike, how much discount would they want? Bike is new, ok no warranty, but unless the frame explodes, nothing else can really go wrong.
If it is a good brand, no frame issues......20% discount, 30%?
I'm also aware buyers compare your bike to the cheap ones at the shop but that's not a fair comparison is it? So let's hear it, what is a fair price and I'm not talking desperate sale, just between knowledgeable seller and buyer.
Interested to know as I'm going to sell my Dahon Vitesse.
desastar
post Jun 12 2015, 09:30 PM

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That looks like a Birdy!

Still, amazing effort !
desastar
post Jun 18 2015, 01:29 PM

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QUOTE(azamunekurone @ Jun 18 2015, 12:21 PM)
hahaha..ask uncle ah hock for special oder.last time i saw p9 at his shop.

to tell you the truth,
change ur leg for faster speed brows.gif  brows.gif

hahahah,just kidding rclxm9.gif
but the truth is,..
certain bike, stock gearset that come with the bike didnt satisfy the need for every body.some people may absorb stock setup and some people will mod it to depends to suite ur need and ur budget!

is bigger crank always good?
its up to u and ur leg.fyi, stock tern verge p9 come with fsa 55t crank.but i change it to SRAM Red 53/39 to fill up my need.why i didnt bougt the 2nd chainring at 1st?

ok some may said hollowtech are better than square taper type of bottom bracket.the question is, why i didnt change the chainring to 55t or 56t or 58t or 60t???and why i didnt change 55t chainring on fsa onto the sram red crank since both are 130mm BCD??????
its because my leg cannot pedal 55t on 20inch bike..same does on 16,i can maximized all the gear depends on my strenght,my setup and my preference! (my 16" bike are for syoksyok funfun short distance bike / commute)

when time flies by my friend,u will get ur favourite gear to suite ur style of pedalling.trust me.last time,i experiment many type of gear setup.i bought many cassette to try from 11-34, 11-32, 11-36, 12-30, 12-25, 11-28 and 11-25.i also rojak my cassette until i find the sweat spot multipurpose of 11-28 on my verge. different setup goes for my EMC Roadbike, my Doppleganger, My Speed p8 and Fnhon 16".Like sifu Ettige, he like to use 12-30 setup! thumbup.gif
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This is so true. Bigger cranks doesn't mean bike will go faster.......if the legs are weak. That large crankset on that little Trinx is a joke! rclxub.gif
desastar
post Jun 22 2015, 09:40 PM

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I noticed there's been some discussions about gearing and possibly adding front derailleur to your bike. Some bikes have not been designed to bolt on a front derailleur and my Bike Friday is a classic example. Have you guys ever thought about adding an internal hub to extend your gearing? Works very well. I have 8 speed cassette and with a 3 speed hub, I have 24 gears in total. The Sram dual drive shifts instantly and very simple to maintain. Only thing you need to do is to lace the hub onto your wheel and off you go. May be easier than modifying the frame! Worth considering.

Attached Image Attached Image
desastar
post Jun 23 2015, 12:23 PM

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QUOTE(Jay Chua CC @ Jun 23 2015, 10:07 AM)
By doing this ,how much wilol it cost again? sweat.gif
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I have seen them advertised for around US$200. May sound a lot, but then you won't have to change crankset, add FD hanger, FD and bottom bracket. But if you can't add these in the first place, yo have no choice if you wanted more gears. The two and three speed ones are not too heavy, unlike the Alfine 8 or 11 speed, those weigh a ton!!


desastar
post Jun 24 2015, 12:06 PM

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QUOTE(Jay Chua CC @ Jun 24 2015, 09:05 AM)
Huh? Wat do you mean by cut? Not just loosen the screw?
How can i lower the handlebar bar?
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If you don't know how it works, best to let the shop do it for you. If you measured wrong and cut cry.gif


desastar
post Jun 24 2015, 04:31 PM

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QUOTE(Jay Chua CC @ Jun 24 2015, 12:08 PM)
you mean must disassemble and cut it? ohmy.gif
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Yes, that extra length is attached to your fork so it needs to be disassembled so you can cut.

If you find that your handlebar is too high, you'll have to cut it to lower it. If you didn't even notice, then no worries man!!!


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