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 02-09-11, 03:23 PM   #1
trust068
Junior Member
Thread Starter
 
Join Date: Feb 2011
Location: Riverside, CA
Bikes: downtube 9FS
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
local shop said my brand new downtube FS9 is defective? help!

I got a FS9 in decemeber but i never had chance to ride it or take it to shop to get tune up - because it wont fit into my car (g35 coupe) ...so i actually picked up a beat up cheap suv to transport it and bring it to a shop. however, a local bike shop told me that the chain was obvious too short. he pointed out that the Derailleur was stretched way too far forward and it is actually touching the tire.
I emailed downtube and Yan just replied

I can't diagnose any issue from the pics. Please look at http://www.downtube.com/Adjustment_I...ur_Adjustment/

i am wondering if i can get some help here. is the bike shop been wrong or my brand new downtube was defective?







thanks!
trust068 is offline   Reply With Quote
Old 02-09-11, 03:42 PM   #2
Dynocoaster
Senior Member
 
Join Date: May 2004
Location: Pacific Northwest
Bikes: Too many....................
Posts: 3,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Check out the picture on the site it looks about the same. http://www.downtube.com/Full_Suspens...ding_Bike.html
Dynocoaster is offline   Reply With Quote
Old 02-09-11, 03:45 PM   #3
BruceMetras
Senior Member
 
Join Date: Aug 2005
Location: San Rafael, California
Bikes:
Posts: 1,888
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
I'd check the derailleur hanger first .. they can get bent easily in shipment.. if it's out of alignment, bend it.. if the hanger is okay, installing another chain link is no big deal..
BruceMetras is offline   Reply With Quote
Old 02-09-11, 03:45 PM   #4
Dynocoaster
Senior Member
 
Join Date: May 2004
Location: Pacific Northwest
Bikes: Too many....................
Posts: 3,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It could be that it got tweaked in shipping? I found this pic also on the site
http://www.downtube.com/popup_image....k_standing.jpg
Dynocoaster is offline   Reply With Quote
Old 02-09-11, 04:20 PM   #5
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,855
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
A bike mech saying the bike is defective from that insignificant a problem? I think the problem lies with the bike mech, not the bike.

From the pics, I would not call the derailer stretching as too severe. Looks about right, just what I use.

Derailers and small wheels can interfere, it happens on my Birdy... I wouldn't say the bike is defective, not at all. MAYBE it could do with another link in the chain as Bruce sez. Also check the derailer hanger is vertical.
jur is offline   Reply With Quote
Old 02-09-11, 04:25 PM   #6
brakemeister 
New usename ThorUSA
 
brakemeister's Avatar
 
Join Date: Nov 2004
Location: Southern Illinois USA
Bikes:
Posts: 2,469
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what Jur sez .....:-)
those bike mechanics are the industry worst nightmare...however I personally LIKE them as they drive biz right into my waiting arms ...

dont worry... bike is fine ..just bend that derailleur a litle bit outwards and everything will be fine ....

thor
__________________
www.thorusa.com
Dahon : Freedom Unfolds
Tern : all about the ride
brakemeister is offline   Reply With Quote
Old 02-09-11, 04:56 PM   #7
Russcoles11
Senior Member
 
Russcoles11's Avatar
 
Join Date: Sep 2010
Location: Bristol, UK
Bikes: Royal Enfield Revelation, Dawes Kingpin
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
So there we have it, there is nothing wrong with your bike, its just part of a world wide conspiracy masterminded by Thor

Hmmm does Thor have a hollowed out volcano as his bike shop?
Russcoles11 is offline   Reply With Quote
Old 02-09-11, 05:42 PM   #8
trust068
Junior Member
Thread Starter
 
Join Date: Feb 2011
Location: Riverside, CA
Bikes: downtube 9FS
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for reply.
The bike shop actually wanted to add more links to it but I said I will check with the company first because it is new out of box
trust068 is offline   Reply With Quote
Old 02-09-11, 07:10 PM   #9
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,855
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Actually, taking OUT a link might be the go... if a link is added, it is likely the derailer will go down and back a bit, still interfering as before. But removing a link (assuming the derailer could handle it, it might not) will put the bottom pulley up a bit, away from the tyre.

To see if a link could be removed and what effect it might have, just pull the chain bottom side forward exactly 1".
jur is offline   Reply With Quote
Old 02-09-11, 08:48 PM   #10
kamtsa
Senior Member
 
kamtsa's Avatar
 
Join Date: Dec 2008
Bikes:
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
[QUOTE=trust068;12201482.. it wont fit into my car (g35 coupe)[/QUOTE]

A folder does not fit in a car's trunk?

Maybe you need a different model (folder, not car).
kamtsa is offline   Reply With Quote
Old 02-09-11, 09:48 PM   #11
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,358
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 633 Post(s)
Chain length looks fine, You only have 1 chainring,
so what's it look like in high gear ratio?

Do a derailleur hanger alignment check..

maybe just the nature of running a little wheel
and having a long cage rear mech.

Replace the rear hub with a Dual drive 3x9 hub and a smaller cassette
and a shorter rear derailleur will work, and still give you the gear range.

Last edited by fietsbob; 02-09-11 at 10:09 PM.
fietsbob is offline   Reply With Quote
Old 02-09-11, 09:57 PM   #12
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,855
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
Quote:
Originally Posted by fietsbob View Post
Replace the rear hub with a Dual drive 3x9 hub and a smaller cassette
and a shorter rear derailleur will work, and still give you the gear range.
Highest priced solution FTW!
jur is offline   Reply With Quote
Old 02-09-11, 10:00 PM   #13
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,358
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 633 Post(s)
Heck A Rohloff hub would be even pricier. a real cure.

flash from the past,
single ring 13-32 cogs on the back a short cage 80's <C>Chorus worked fine.

the top pulley is the axis the cage rotates around on those .

their curious design : A/B paralellogram mounting, A for straight blocks ,
and B for wide range cog clusters.

Last edited by fietsbob; 02-11-11 at 05:00 PM.
fietsbob is offline   Reply With Quote
Old 02-09-11, 10:46 PM   #14
chucky
It's got electrolytes!
 
chucky's Avatar
 
Join Date: Aug 2009
Bikes: Self-designed carbon fiber highracer, BikesDirect Kilo WT5, Pacific Cycles Carryme, Dahon Boardwalk with custom Sturmey Archer wheelset
Posts: 1,388
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You better ask that mechanic what you're paying him for because smoothing over all the little niggles like this is exactly why the manufacturer recommends a tuneup.
chucky is offline   Reply With Quote
Old 02-10-11, 12:50 AM   #15
feijai
Senior Member
 
Join Date: May 2007
Location: Washington, DC
Bikes:
Posts: 905
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
1. If you're really genuinely worried about that long-cage derailleur hitting the tire, you could always grab a medium-cage 9-speed rear derailleur. Maybe the SRAM x.5. About $50.

2. And what the heck is a "Sunrace M93 Rear Derailleur?" Sunrace's website lists no such thing, and consulting the Google was not helpful. Closest I could find was the RD-M97 long cage.
feijai is offline   Reply With Quote
Old 02-10-11, 01:27 AM   #16
trust068
Junior Member
Thread Starter
 
Join Date: Feb 2011
Location: Riverside, CA
Bikes: downtube 9FS
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks guys, I will take it to different shop to get adjustment. i always had doubt with mechanics too. I will get more mod in the future.
trust068 is offline   Reply With Quote
Old 02-10-11, 04:04 AM   #17
jur
Senior Member
 
Join Date: May 2005
Bikes:
Posts: 6,855
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
There are of course many bike mechs who are golden. We should not tar everyone with this thread's brush. It's worth finding an LBS where an experienced chap works.
jur is offline   Reply With Quote
Old 02-10-11, 09:24 AM   #18
brakemeister 
New usename ThorUSA
 
brakemeister's Avatar
 
Join Date: Nov 2004
Location: Southern Illinois USA
Bikes:
Posts: 2,469
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
absolutely true .... many many real good ones out there ..... just the few bad apples make them all look bad ..which is a shame
thor
__________________
www.thorusa.com
Dahon : Freedom Unfolds
Tern : all about the ride
brakemeister is offline   Reply With Quote
Old 02-10-11, 09:50 AM   #19
Azreal911
Senior Member
 
Join Date: Jul 2009
Location: Toronto, Ontario, Canada
Bikes: Wheeler Mtn bike, Strida 5.0, Tern Link Uno, FSIR Spin 2.0, Dahon Mu P8
Posts: 884
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
Also can you take a pic of the derailler when it's on the highest gear also? cause that might show you how adding one more link to it become too long for the chain and it just slacks too much on the derailler on high gear. That low gear isn't a problem it looks stretched since you are on the lowest gear and looks abnormal, but you would probably 95% of the time be sitting on the middle gear which would then have that regular derailer look that we're all used to.
Azreal911 is offline   Reply With Quote
Old 02-10-11, 10:33 AM   #20
bored117 
Senior Member
 
Join Date: Jun 2010
Location: Riverside, CA
Bikes: Helium SL DA DI2, Defy Advanced 0 Di2, 6KU Fixie
Posts: 1,043
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by trust068 View Post
Thanks guys, I will take it to different shop to get adjustment. i always had doubt with mechanics too. I will get more mod in the future.
Which shop did you go to? I might have some pointer depending on where you went
bored117 is offline   Reply With Quote
Old 02-10-11, 11:28 AM   #21
kamtsa
Senior Member
 
kamtsa's Avatar
 
Join Date: Dec 2008
Bikes:
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by feijai View Post
1. If you're really genuinely worried about that long-cage derailleur hitting the tire, you could always grab a medium-cage 9-speed rear derailleur. Maybe the SRAM x.5. About $50.
I have a 11/32 9spd cassette, single chainring, with a medium cage SRAM derailleur and it works very well.

Make sure though that it matches your shifter (e.g. Shimano vs SRAM cable pull).

(Originally the bike came with a long cage but brucemetras set it this way.)
kamtsa is offline   Reply With Quote
Old 02-10-11, 12:09 PM   #22
BruceMetras
Senior Member
 
Join Date: Aug 2005
Location: San Rafael, California
Bikes:
Posts: 1,888
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Quote:
Originally Posted by kamtsa View Post
I have a 11/32 9spd cassette, single chainring, with a medium cage SRAM derailleur and it works very well.

Make sure though that it matches your shifter (e.g. Shimano vs SRAM cable pull).

(Originally the bike came with a long cage but brucemetras set it this way.)
You should have a SRAM X9 short cage on the bike.. I like the short cage units on small wheel, single chainring bikes, if for nothing else than to help keep it out of harm's way..
BruceMetras is offline   Reply With Quote
Old 02-10-11, 09:25 PM   #23
trust068
Junior Member
Thread Starter
 
Join Date: Feb 2011
Location: Riverside, CA
Bikes: downtube 9FS
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by bored117 View Post
Which shop did you go to? I might have some pointer depending on where you went
I went to the one on central ave right in front of AAA, i cannot remember the shop name right now. it runs by bunch of young guys
trust068 is offline   Reply With Quote
Old 02-10-11, 09:33 PM   #24
Amani576
Buh'wah?!
 
Amani576's Avatar
 
Join Date: Jul 2008
Location: Raleigh, NC
Bikes: 1972 Raleigh Twenty, mid-80's Trek
Posts: 2,130
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Your shop mech is an idiot.
But... let me get this straight. You can't fit this:

Into this?:

I don't mean to be rude, but are you sure you even folded the bike correctly?
I don't usually look around here, but I poked my head in and saw this and had to clarify.
-Gene-
Amani576 is offline   Reply With Quote
Old 02-11-11, 12:03 AM   #25
trust068
Junior Member
Thread Starter
 
Join Date: Feb 2011
Location: Riverside, CA
Bikes: downtube 9FS
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yup, it wont fit. RWD japanese coupes usually had a shallow trunk. I had 97 BB6 prelude in the past, it fits my Dahon folding bike fine. plenty of people complained about small it is. http://g35driver.com/forums/g35-coup...too-small.html
The trunk even comes an instructor how to load 2 golf bags in there.....



I know i know you still dont believe me, here is the proof. The bike is all the way in and touching the back of rear seat already.
trust068 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 12:54 AM.