Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-02-08, 12:40 AM   #1
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Classic Dahon Mariner

I got this Dahon Mariner from craigslist. The guy I got it from kept it in his attic for years and its cherry. I just needed to oil it up and it rides smooth. I think its a great bike but quite heavy, the thing is like all steel.

The only real problem is the plastic parts of the bike seem to be deteriorateing. The plastic disk behind the cogs crack to the touch. The front fender broke off when I took a tumble, I'm still learning how to ride. The plastic shield around the chain is a gone too. Who says plastic lasts forever.

I'm thinking about getting new brake paddles. The stock paddles dont have the reach adjuster, I have to reach pretty far to grasp the paddles.


noob_island is offline   Reply With Quote
Old 10-02-08, 12:59 AM   #2
joseff
Senior Member
 
Join Date: Jan 2008
Bikes:
Posts: 205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Welcome noob_island, to the wonderful and money-annihilating world of folding bikes!

Plastic disc behind the cogs: you should just do away with this, instead of risking it catching the chain.
Brake levers ("paddles") you could try using just two fingers. It would be a long reach for all four fingers.

Other things to check:
- Check & adjust frame hinge to eliminate any play/wobble. I see you have two.
- Ditto the handlepost hinge
joseff is offline   Reply With Quote
Old 10-02-08, 01:57 AM   #3
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It is sort of addicting, I've only had it a month and I'm already thinking of stuff to mod it. I think the upgrades will cost more than the bike!!!
noob_island is offline   Reply With Quote
Old 10-02-08, 08:31 AM   #4
Lalato
Senior Member
 
Lalato's Avatar
 
Join Date: Sep 2007
Location: Bay Area and Sacramento
Bikes: Bike Friday Tikit
Posts: 1,160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
The dreaded folderitis claims another victi... erhm... happy customer.

--sam
Lalato is online now   Reply With Quote
Old 10-02-08, 05:12 PM   #5
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,806
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
You're not folding it correctly.

1. Fold the handlepost down. Don't rotate the steering axis.
2. Push seatpost down.
3. Fold frame. handlepost ends up between the wheels.

If the handlepost interferes with something, pull the handlebars further out of the handlepost so that they end up below the wheel axles - there is lost of room there for the handlebars. You should be able to get the axles to touch each other when successfully folded.

jur is offline   Reply With Quote
Old 10-02-08, 08:50 PM   #6
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Actually if I dont rotate the front wheel the handle bars stick into the pedal gear and prevents me from closing the bike. The handle bar goes down at that odd 5 o'clock angle.
noob_island is offline   Reply With Quote
Old 10-02-08, 09:35 PM   #7
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,806
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
The odd angle after folding suggests the handlepost itself is not fitted correctly. The hinge should be at 45deg so that after folding the handlepost down, the handlebars are parallel to the front wheel.

You also have to find the most optimum place for the pedal crank arms to be. For the smaller Classic Dahon, that position was with left crank at 12 o'clock.
jur is offline   Reply With Quote
Old 10-02-08, 10:15 PM   #8
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That does make sense. I looked around the pivot point but i can't see a way to correct it. The lock mechanism that connects the handle post to the fork forces me to put it out at that angle. You can sort of see it on the picture.
noob_island is offline   Reply With Quote
Old 10-02-08, 10:22 PM   #9
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think my Mariner must be pre-internet because I cant seem to find a picture of it folded even on the Dahon website.

I did find this picture of the bike unfolded and the hinge position is the same. But there is no picture of it folded so I have no way to confirm if the handle bar is at an angle when folded.

noob_island is offline   Reply With Quote
Old 10-02-08, 10:58 PM   #10
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,806
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by noob_island View Post
That does make sense. I looked around the pivot point but i can't see a way to correct it. The lock mechanism that connects the handle post to the fork forces me to put it out at that angle. You can sort of see it on the picture.
Unfortunately it is not easy to correct it. The 2 locking nuts inside the hinge have to be tapped with hammer and drift to loosen them a bit which frees the handlepost to rotate to the correct orientation.
jur is offline   Reply With Quote
Old 10-09-08, 12:43 AM   #11
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I took a tumble the other day. The bike flew out from under me but I managed to keep standing by holding on to the handle bar. I thought I heard a cracking sound but I checked out the bike and everything was fine. I got back on and the bike didn't feel right. I got off and looked down and the handle bar was misaligned. I pulled the handle bar out of the handle bar post and the plastic guide shim was broken.


Here is a close up of the broken shim.

The right piece has the guide for the handle bar post.

I put tape where the crack is but the handle bar still wobbles. I have to eyeball the handle bar every time I unfold the bike. Anyone know where I can get a replacement?

Last edited by noob_island; 10-09-08 at 03:27 AM. Reason: describe the inside of the shim
noob_island is offline   Reply With Quote
Old 10-10-08, 06:59 AM   #12
2wheeldeal
Goldmember
 
2wheeldeal's Avatar
 
Join Date: Aug 2008
Location: Portland, OR
Bikes: Trek Multitrack 750, Dahon Classic
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Seatpost adapter shims are available from most bike parts dealers. Try Universal or Performance Bike. They run around $8 or $9, and they don't have the stud in the side, but the right size will give you a smooth sliding surface, and enough clamping pressure should keep the stem from rotating.
2wheeldeal is offline   Reply With Quote
Old 10-10-08, 09:50 AM   #13
joseff
Senior Member
 
Join Date: Jan 2008
Bikes:
Posts: 205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
^ agree with 2wheeldeal. Don't ride it if you can't clamp it properly.
joseff is offline   Reply With Quote
Old 10-10-08, 12:50 PM   #14
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think Im going to try that out. I'm looking at the shim closer and I found a smaller crack.
noob_island is offline   Reply With Quote
Old 10-18-08, 03:43 AM   #15
noob_island
Member
Thread Starter
 
Join Date: Sep 2008
Bikes:
Posts: 45
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by jur View Post
The odd angle after folding suggests the handlepost itself is not fitted correctly. The hinge should be at 45deg so that after folding the handlepost down, the handlebars are parallel to the front wheel.

You also have to find the most optimum place for the pedal crank arms to be. For the smaller Classic Dahon, that position was with left crank at 12 o'clock.
I don't have the tools to fix the handle post and I didn't want to spend the cash at my LBS for them to do it. I just recently found this Zoom 20 inch MTB Suspension Fork at NYCBikes.com. Now I would spend some cash for front suspension and have them fix the handlepost at the same time. I was just wondering if anyone knows if something like this will fit on my bike?

http://www.nycbikes.com/item.php?item_id=484

noob_island is offline   Reply With Quote
Old 10-18-08, 05:20 AM   #16
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,806
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
I don't think so. Dahon headset designs were radically different from the beginning.
jur is offline   Reply With Quote
Old 09-19-11, 07:31 PM   #17
neomor
Newbie
 
Join Date: Sep 2011
Bikes:
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Need help with Classic Mariner--Anybody from this thread still around?

I just got this exact same model of Dahon Mariner, and I can't figure out how to fold the frame!!!!?!?!?!? I see the latch, but, I don't even see how it is theoretically supposed to move, and pushing it and pulling it in various directions has not made it move yet?!!? I don't want to break my new/old bike which has made it this far and is still in good working order, but it's not much good as a folding bike if I cant fold it! Thanks in advance to anyone who can help! (Note: no manuals or videos available anywhere online :-( )


Quote:
Originally Posted by noob_island View Post
I got this Dahon Mariner from craigslist. The guy I got it from kept it in his attic for years and its cherry. I just needed to oil it up and it rides smooth. I think its a great bike but quite heavy, the thing is like all steel.

The only real problem is the plastic parts of the bike seem to be deteriorateing. The plastic disk behind the cogs crack to the touch. The front fender broke off when I took a tumble, I'm still learning how to ride. The plastic shield around the chain is a gone too. Who says plastic lasts forever.

I'm thinking about getting new brake paddles. The stock paddles dont have the reach adjuster, I have to reach pretty far to grasp the paddles.


neomor is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 08:42 PM.