Dahon Folding Bicycle Forum: Technical http://forum.dahon.com/index.php Thu, 02 Sep 2010 17:17:32 -0600 30 http://forum.dahon.com/index.php?showtopic=9300
Today I bought brand new Dahon Piazza D3 with Sram T3 hub. After some minutes of riding, it started to make very loud, clicking noise, only when riding with freewhell. Do You know, if it's normal or dangerous ? How to get rid of this ?

Excuse my English, please :-)]]> Thu, 02 Sep 2010 11:41:15 -0600 http://forum.dahon.com/index.php?showtopic=9300 http://forum.dahon.com/index.php?showtopic=9299
I wonder if VP18 owners have the similar issuse and hope if you and the Dahon Rep could help out. My VP 18 was purchased 3 months ago and the front shifter/derailleur worked prefectly but in the last weeks the front shifter could no longer be 'shifted' to "H" level (but could be shifted to the "L" and mid level).

I thought it was related to the cable/derailleur settings so I went back to the seller and asked them if they could help make some adjustment or inspection if some wrongings I could have done. However, the technicans (actually 2) of the seller, without even giving my bike a look, UNANIMOUSLY lectured me that it is a common issue that was casued by the fact that the front shifter was supposed to be used for triple chainrings, but VP18 came with a double one that the "H" level is not useable.

I recalled at the time of the purchase, the seller (the same technicans) told me there is an intermediate "shifting" level between "H" and "L" that could be used (i.e. 3 useable levels).

Now I found it very confusing.

Did you encounter the similar issue or I am oversensitive? Your advise is very much appreciated.

Cheers,

KK]]> Thu, 02 Sep 2010 01:10:28 -0600 http://forum.dahon.com/index.php?showtopic=9299 http://forum.dahon.com/index.php?showtopic=9293
Just wondering if anyone has already thought about putting a electrical power kit on a Jetstream P8.

I'm planning to install one called "Magic Pie" but I'm afraid it won't fit or won't work well.


Any thoughts or comments ?

Thanks !]]> Tue, 31 Aug 2010 19:52:08 -0600 http://forum.dahon.com/index.php?showtopic=9293 http://forum.dahon.com/index.php?showtopic=9292 On the rear wheel of my Mu Ex a spoke broke. These are the Laser Sapim spokes. You can buy those in 2mm steps, 177, 179, 181, and 183mm lenght. Anybody knows which lenght is correct? Tue, 31 Aug 2010 16:39:04 -0600 http://forum.dahon.com/index.php?showtopic=9292 http://forum.dahon.com/index.php?showtopic=9284 I have a Dahon Jack and my Deraileeur Hanger part is brocken.

Would anyone advise me what part exactly shall I buy?

I found the part in Amazon called D-24 Deraileeur Hanger. According to description it fits Dahon. But I am now sure, are ALL Dahons have exactly the same deraileeur hanger?

Thank you in advance

]]> Sat, 28 Aug 2010 14:31:08 -0600 http://forum.dahon.com/index.php?showtopic=9284 http://forum.dahon.com/index.php?showtopic=9280 I have an older (more than 10 years) Dahon folding bike. I was curious if I could find the year and model from the serial number, which is DH2900244.

Thanks!

Randy]]> Fri, 27 Aug 2010 13:53:46 -0600 http://forum.dahon.com/index.php?showtopic=9280 http://forum.dahon.com/index.php?showtopic=9273 Its for city riding with S2C hub and Marathon Racer or Big Apples.

There are no specs on the web for the Kinetix to compare rims. I was thinking the Alex DA16 look like a match.
Any help/suggestions would be greatly appreciated.
Thanks!
]]> Thu, 26 Aug 2010 21:05:05 -0600 http://forum.dahon.com/index.php?showtopic=9273 http://forum.dahon.com/index.php?showtopic=9271


Schlumpf bottom bracket gear

Just thought it's been a while since we've had these on the forum. Nice, tidy, but expensive way to get a second set of ratios out of your rear hub if you can't fit a front derailleur.]]> Thu, 26 Aug 2010 09:00:29 -0600 http://forum.dahon.com/index.php?showtopic=9271 http://forum.dahon.com/index.php?showtopic=9267
The container it came in just said "handlepost" under Part Name. There was no shipping slip which would have comfirmed the item I received. There are no instructions.

The part # listed is: BAA1203000484. Can someone from Dahon please comfirm that this is the right part and where I can find the instructions to install the handlepost correctly?]]> Wed, 25 Aug 2010 15:46:40 -0600 http://forum.dahon.com/index.php?showtopic=9267 http://forum.dahon.com/index.php?showtopic=9259 Mon, 23 Aug 2010 17:53:29 -0600 http://forum.dahon.com/index.php?showtopic=9259 http://forum.dahon.com/index.php?showtopic=9258
Thanks

vox]]> Mon, 23 Aug 2010 17:36:18 -0600 http://forum.dahon.com/index.php?showtopic=9258 http://forum.dahon.com/index.php?showtopic=9250 Sat, 21 Aug 2010 21:21:07 -0600 http://forum.dahon.com/index.php?showtopic=9250 http://forum.dahon.com/index.php?showtopic=9244 Fri, 20 Aug 2010 20:48:37 -0600 http://forum.dahon.com/index.php?showtopic=9244 http://forum.dahon.com/index.php?showtopic=9242 I just bought a TR 2008 new. My SRAM dual drive on TR slips a little - seems to slip for a second only around 4th or 5th gear on the right hand selection of gears. I am wondering why.
Also, as I ride I seem to hear soft continuous clicking from my chain and rear hub - almost as if they are not meshing together. Is there any reason why?

Thanks in advance.]]> Fri, 20 Aug 2010 10:27:58 -0600 http://forum.dahon.com/index.php?showtopic=9242 http://forum.dahon.com/index.php?showtopic=9240
My Cadenza has an eccentric bottom bracket and has developed a very irritating and loud creak when being peddled - it's at its worst going uphill. I thought it was the pedals but I have changed them and the noise has got worse if anything. The bike gets a lot of use and gets quite dirty so I'm not sure if it needs taking to bits, cleaning and greasing or if the bottom bracket is failing.

Any suggestions? I'm happy to tackle most jobs on bikes but I have previously failed to replace a conventional bottom bracket. Does the presence of the eccentric bottom bracket make this easier or harder and are their specific tools required in respect of the ebb? (I have the conventional bottom bracket stuff.) Is there a manual or instructions re the eccentric bottom bracket available?

Thanks for your help.

Peter]]> Fri, 20 Aug 2010 00:54:56 -0600 http://forum.dahon.com/index.php?showtopic=9240 http://forum.dahon.com/index.php?showtopic=9239
SV2 or SV3?

Schwalbe website says "tube 2" but I can't seem to find them anywhere.]]> Fri, 20 Aug 2010 00:24:36 -0600 http://forum.dahon.com/index.php?showtopic=9239 http://forum.dahon.com/index.php?showtopic=9236
anyone know where I can get a spare set of V Brake noodles for my 2007 Speed P8? I recently added drop bars which I'm loving but would like the option to stick the flat bars back on for when my sis wants to ride it. The easiest way in my opinion would be to swap the bars in and out with their respective cables attached to the levers (as I think about it I'd still have to remove the rear noodle to feed the outers through the guides ).

Still, spare noodles would be handy as I work out a solution!

Cheers,]]> Thu, 19 Aug 2010 10:48:04 -0600 http://forum.dahon.com/index.php?showtopic=9236 http://forum.dahon.com/index.php?showtopic=9227 I live in Sweden and I am pretty new to to Dahon community. I bought a Dahon Mu SL early summer to have it commuting on the train to and from work. That's working fantastic, the bike is great and considering the low weight it suits the purpose perfect!

During the summer I have found out that now and then it is also great riding this bike on other occasions. Sometimes where the roads are less good and tyres like the Schwalbe Big Apple would be of my choice.

Does anyone know if it is possible to fit these fat tyres on the Mu SL and if so what parts should I look for? I want the easiest possible solution, meaning wheels that can have Schwalbe Big Apple or at least bigger ones than the Kojak. Then I possibly would like to have the same type of cassette for the gears as I currently have.

Just so that I easily could switch wheels depending on where I want to go.

Anyone who have done this, have any ideas or am I simply on the wrong track? ;-)]]> Wed, 18 Aug 2010 08:33:52 -0600 http://forum.dahon.com/index.php?showtopic=9227 http://forum.dahon.com/index.php?showtopic=9225
So far all seems good -- I get an intermittent noise from the back that I've decided (after pouring a little water) is just spoke squeak. I'll have my local shop tune them after a few more days/miles.

I bought it at what I think is a local business, although they do have three stores in the Albuquerque area. Before buying, I noticed I didn't think the rear wheel (with the Shimano Premium Nexus 8 hub, freewheel style) coasted as much as it should. The sales/tech guy did note the chain may have been too tight and loosened it so there is just a bit of play. That didn't really make much difference. A week later, I took it to the store near me for some accessory and asked their techs to check the same thing. Everybody agreed it didn't seem to coast as much as they would have guessed (certainly way less than any derailer type free-wheel. But they have virtually zero experience with these geared hubs and just weren't willing to state it isn't actually OK. And we all are allowing that maybe it will loosen up after it gets broken in.

I know this is tricky to measure, so here's one method easy for me: I put it in gear 1 (lowest) and rotate the crank at 60 rpm (1 revolution per second). After I stop cranking, the wheel coasts to a stop in 5 seconds (coincidentally, about 5 1/2 wheel revolutions). Cranking backwards, the friction allows the wheel to soon catch up to the crank speed, making it then just as if I were cranking forward. Although there is no obvious sound of rubbing or the like, it does seem to slow more quickly through certain portions of the wheel revolution than others. And there is absolutely no way it is free enough to coast back and forth until stopping with heavy-side down, which the front wheel and even my derailer freewheel hub easily do.

Questions:
1. Will this loosen up with time?
2. If so, how best to break in: riding in lower gears, higher gears, frequent shifting, etc.?
3. Although there are no obvious bad sounds, I notice that the usual freewheel ratchet-clicking sound (which, as Shimano states, only occurs in gears five to eight of this hub), only takes place when cranking backward, not simply from the wheel coasting. Is this normal?
4. Could it simply be over-packed with grease? If so, should anything be done?
5. Is it actually faulty and should be taken back? How do I convince the local shop it is defective?
6. Could it be miss-adjusted?

If we get to the last option: It does seem sort of like a conventional hub with the two end nuts overtightened like you could do on old coaster brake hubs and standard cone hubs, although there is absolutely no feel of binding bearings. But while I feel I could make such an adjustment myself, I would like to work with the detailed Shimano instructions and torque values. But being brand new, I shouldn't have to be doing this. As you can imagine, I don't feel the techs at the local shops are up to speed on this hub enough to be working on it.

I really appreciate any additional information or advice any of you can give me.]]> Tue, 17 Aug 2010 15:32:56 -0600 http://forum.dahon.com/index.php?showtopic=9225 http://forum.dahon.com/index.php?showtopic=9220
What could be causing this? How can it be fixed?

I attached a picture of a properly folded Piccolo, with the lowered seat post, a picture of my bike with its permanently raised seatpost, and an image of the two latches on the seatpost. The latch circled in red raises and lowers my seat. The latch circled in blue doesn't seem to do anything. Could it be the source of the problem?]]> Tue, 17 Aug 2010 13:00:41 -0600 http://forum.dahon.com/index.php?showtopic=9220 http://forum.dahon.com/index.php?showtopic=9206

Jay



http://forum.dahon.com/index.php?act=attach&type=post&id=5012]]> Sun, 15 Aug 2010 16:03:46 -0600 http://forum.dahon.com/index.php?showtopic=9206 http://forum.dahon.com/index.php?showtopic=9205 HERE. The cost for new bearings and special home-made tools should be less than $10. These hubs are actually pretty well-made; there are two things that are likely to fail:
1) the output connector and its associated metal parts, which can become corroded, and plastic parts, which could break if mistreated, and
2) the bearings. These are pretty much guaranteed to fail sooner or later. But "later" is more likely, as the bearings are sealed cartridges. I got 5,530 miles out of the hub whose bearing replacement is described. This was riding year-around in Chicago, with a rider 200 pounds plus a backpack; not an easy life for these bearings. YMMV, especially if you are lighter and/or do not ride in the Winter.

Based on my experience with this overhaul, the most likely reason for increased friction in the hub is the plastic connector parts. There is a very small clearance between the bearing on the output side and the gray plastic connector housing. If there is any distortion in the plastic, there will be friction. Fortunately, this will not cause much resistance. The hub whose service was described had some visible wear on the back of the connector, indicating some prior interference; yet the wheel perfomed normally, a least until the bearing went bad.
Steve]]> Sat, 14 Aug 2010 20:19:02 -0600 http://forum.dahon.com/index.php?showtopic=9205 http://forum.dahon.com/index.php?showtopic=9204
The Rohloff requires a 135mm frame dropout. However, I cannot find a definite spec for the rear dropout spacing on the Cadenza frame.

From what I have gathered so far (from several hours Googling) the specs are as follows:

2007, 2008 - 132mm, but 'built to withstand' 135mm hubs
2009 onwards - 135mm

I also gather it is bad practice to attempt to spread (or 'cold-set') aluminium frames if the spacing is too small.

Can anyone confirm the spacing on the Cadenza? Am I worrying unecessarily?

Thanks for any help...]]> Sat, 14 Aug 2010 16:07:15 -0600 http://forum.dahon.com/index.php?showtopic=9204 http://forum.dahon.com/index.php?showtopic=9201
Getting measurements from Dahon specs of my Speed D7:

Tires - 20" x 1.75

I'm assuming I should get tires of the above size. If I'm ordering through ThorUSA, that tells me I can order the Marathon Plus. Is that right?

Handlebar - 6061-T6 (equals to 31.8 diameter?)

I'm not crazy about the t-bar that's on the D7. Would like to get a more cruiser style handlebar. I'm assuming that any handlebar with a 31.8 diameter will fit the folder.

Comfort handlepost.

Thor already confirmed I can order this for my bike (once they come in - whenever that is). However, I don't know how much closer this comfort handlepost will bring me to the handlebar really. For example, without any special attachments like the aber hallo in place, if the noted distance from the saddle to the handlebar is 25" to 25.9", how many inches closer would the Comfort handlepost bring the handlebars to me? If the amount is less than an inch, it may not be worth getting.

Inner tube for tires

I'm assuming tubes that are 20" x 1.50-2.50 (AV) would fit. I did see some on BIKEUSA that had slime already in them but I'm wondering if that would make it harder to inflate because of the slime inside them.






]]> Fri, 13 Aug 2010 17:11:26 -0600 http://forum.dahon.com/index.php?showtopic=9201 http://forum.dahon.com/index.php?showtopic=9200
I had to replace the original back tire, when it developed a bulge on the sidewall and then I got a Kenda Kwest Tandem to replace the Kenda Kwest piece of crap, that left me on the side of the road when a mere flat screwed up the sidewall. The biks shop assured me that it was better and it does seem more solid on the sidewall. I do worry that the mechanic had such a problem getting it on, because getting it off would be hard as well.

The front tire is the original that came with the bike two years ago, except for the Slime inner tube in it. Yes, I am toying with replacing it at some point before March, 2011, maybe with a Schwalbe Marathon, but right now I am looking for a spare tire that won't take up much space. I am guessing that if I take some duct tape along, it could help me use a tire longer unless it was horribly damaged, but this could be silly. Thoughts?

I was feeling almost bullet-proof until my tire flattened and the sidewall was damaged. I did also have some too flimsy tools to get the tire off very easily, but that will never happen again. It got me to thinking a lot more about potential problems for the planned trip.

Looking for suggestions......]]> Fri, 13 Aug 2010 16:51:10 -0600 http://forum.dahon.com/index.php?showtopic=9200 http://forum.dahon.com/index.php?showtopic=9197
Sheldon Brown's site http://sheldonbrown.com/cribsheet-handlebars.html implies it will be 23.8mm, but I want to make sure, so that shifters and brakes will fit OK.

By the way, I want more comfort, and it seems to be reall difficult to find bars with a big sweep with a 31.8 clamp diameter, so I'm thinking of these: http://civiacycles.com/components/loring_handlebar/. Anybody got any similar suggestions, maybe bars without quite such a sweep?

Cheers.]]> Fri, 13 Aug 2010 04:49:24 -0600 http://forum.dahon.com/index.php?showtopic=9197 http://forum.dahon.com/index.php?showtopic=9196 I have a Vitesse D5. Unfortunately the current bottom bracket is on its way out.

I see I can buy a 'like for like' replacement from dahon-spares in the UK.
http://tinyurl.com/38zp6bj

But, for various reasons (I won't bore you with. unless you really want to know!) I'd like to try something more radical and convert the bike to single speed or maybe fixed.

* However * to use this I'd ideally need a bigger front chainring.

So I'm looking for alternatives to the D5's 38tooth one.

For example: Does anyone know if the one from the D7 fit?
http://tinyurl.com/2w6f9wq

Failing that can anyone tell me the spec of the bottom bracket fitted to the D5 (and I'll go hunt around myself)?

Many thanks in advance.]]> Thu, 12 Aug 2010 13:52:31 -0600 http://forum.dahon.com/index.php?showtopic=9196 http://forum.dahon.com/index.php?showtopic=9195 THIS at Hubstripping.com. I'll be sorry to see it go, if someone doesn't take it over. I've learned a lot from the links. Thanks to (IIRC) Datako for pointing me to this site in the first place. FWIW, many of the links to maintenance of the Shimano hubs, and some first-hand reports of hub service, are now archived on the Dahon forum, so life can go on without Hubstripping.
Steve]]> Thu, 12 Aug 2010 13:43:48 -0600 http://forum.dahon.com/index.php?showtopic=9195 http://forum.dahon.com/index.php?showtopic=9189
Rather than fit a new cable and then have to adjust it later cos of cable stretch. I would like to pre-stretch the cable before fitting it, because the barrel adjuster which one would normally use to adjust the cable is jammed.

Can anyone suggest how to fully pre-stretch a gear cable before fitting it?

Yea, Yeah, Yeah, I know I'm obsessive!

Paul.

]]> Tue, 10 Aug 2010 05:05:10 -0600 http://forum.dahon.com/index.php?showtopic=9189 http://forum.dahon.com/index.php?showtopic=9188 Mon, 09 Aug 2010 16:46:57 -0600 http://forum.dahon.com/index.php?showtopic=9188