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


Go Back   > >

Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-30-10, 12:19 PM   #1
jignall
Senior Member
Thread Starter
 
Join Date: Jul 2006
Bikes:
Posts: 177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Trek 520 SS Conversion

I'm thinking of converting my Trek 520 touring bike to a single speed for commuting. The thing I'm having the biggest logistical issue with in terms of planning it is whether chain tensioning is going to be an issue because of the vertical rear dropouts.

Does anyone have any thoughts or suggestions on this issue?

Also, is it possible to run a single speed setup using standard road skewers (vs. axle bolts)?

Thanks in advance.

Jeff
jignall is offline   Reply With Quote
Old 08-30-10, 12:29 PM   #2
TejanoTrackie 
Veteran Racer
 
TejanoTrackie's Avatar
 
Join Date: Jul 2009
Location: Ciudad de Vacas, Tejas
Bikes: 29 frames + 73 wheels
Posts: 10,262
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 89 Post(s)
Quote:
Originally Posted by jignall View Post
I'm thinking of converting my Trek 520 touring bike to a single speed for commuting. The thing I'm having the biggest logistical issue with in terms of planning it is whether chain tensioning is going to be an issue because of the vertical rear dropouts.

Does anyone have any thoughts or suggestions on this issue?

Also, is it possible to run a single speed setup using standard road skewers (vs. axle bolts)?

Thanks in advance.

Jeff
This has been discussed many times here, but I'll humor you anyway. You have 3 choices with a SS and vertical dropouts:

1) Install a chain tensioner like a singulator
2) Use your existing rear derailleur, locked at the position of your cog
3) Do the magic gear trick and / or use a half link. With a SS chain tension doesn't need to be real precise, and you can allow a fair amount of slack w/o having problems

As to using a road skewer, since you have vertical dropouts then it doesn't matter what kind of gearing you are using, a road quick release skewer will work.
__________________
What, Me Worry? - Alfred E. Neuman

Quote:
Originally Posted by Dcv View Post
I'd like to think i have as much money as brains.
I see the light at the end of the tunnel, but the tunnel keeps getting longer - me

Last edited by TejanoTrackie; 08-30-10 at 12:33 PM.
TejanoTrackie is offline   Reply With Quote
Old 08-30-10, 12:30 PM   #3
xavier853
.
 
xavier853's Avatar
 
Join Date: May 2009
Location: Columbus
Bikes: Pegueot UO8, Tommaso Augusta
Posts: 2,027
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Because you are making a SS and not a fixed gear, using a chain tensioner is not a problem.



EDIT: TejanoTrackie beat me to it, and he's info is more helpful!
xavier853 is offline   Reply With Quote
Old 08-30-10, 12:32 PM   #4
jignall
Senior Member
Thread Starter
 
Join Date: Jul 2006
Bikes:
Posts: 177
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Great thanks. I know this has been discussed a lot here but unfortunately when something is discussed so much in a strange way it's difficult to find actual information because people tend to go on riffs etc...
jignall is offline   Reply With Quote
Old 08-30-10, 12:32 PM   #5
Kayce
Senior Member
 
Kayce's Avatar
 
Join Date: Aug 2010
Location: St Louis
Bikes:
Posts: 1,846
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As far as I remember/ know about you five different options.

1.(most expensive, little work, best looking) Get yourself some sort of single speed chain tensioner, such as this one from surly: http://www.bikebling.com/ProductDeta...rly-Singleator

2.(little bit more work, less clean looking, free) remove the limit screws from your derailer, and shorten your chain to where the derailer is pulled as tight(horizontal) as you can get it, making your two pulley derailer work like the chain tentioner

3.(most work, more clean looking than 2, very cheap) get longer limit screws for your derailer, play with it till you get a traditional looking derailer set up that holds your chain tight.

4.(most expensive, super clean looking, a bit of work) Buy a white industries Eccentric hub.

5.(cheap, lots of work, doesnt really work that great) Eric House's magic ration may work, I have had very mixed results http://eehouse.org/fixin/fixmeup.php


As for the road type skewer, it will work just fine if you use it right. You may want to invest in a higher end aftermarket skewer but for a single speed I dont know if it would be worth it.
Kayce is offline   Reply With Quote
Old 08-30-10, 03:17 PM   #6
CardiacKid
SNARKY MEMBER
 
CardiacKid's Avatar
 
Join Date: Jul 2005
Location: South Austin
Bikes:
Posts: 2,829
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Why don't you just sell the 520 and buy a new single speed. Touring bikes are in high demand right now. You should be able to get a really nice single speed and have money left over. If you want to build one for the fun of it, same solution. You should be able to find a decent frame with horizontal dropouts for around $100.
I just sold my 1988 Trek 520 within 24 hours of posting it on CL. I guess I wasn't asking enough.
CardiacKid 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 02:30 AM.