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 03-10-11, 09:24 AM   #1
viper_04649
was fixed, now i am free
Thread Starter
 
Join Date: Oct 2006
Location: Boston
Bikes: Royal H Rando, IRO Mark V Pro, Redline Monocog 29er
Posts: 148
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Dingle speed spacing

I have a SS mtb, and want to change it to a dingle (double single) speed. This would require me to replace the bash guard with a larger outer ring on the cranks. And add another cog to the rear. To make this work correctly, i would make sure that the number of teeth was the same for both combination (ie 32x18 / 34x16 or something like that). This will go on a regular shimano freebody hub.

Since is has been working with the inner ring and spacing on the rear cog as a ss, i would just remove the outer spacer, add a thinner, the take care of the crank thickness, add the smaller cog, then spacers to space out the rest of the cassette.

Is this the best way to do it? If so, what would be the spacing/spacer size between the two cogs for correct chainline?



Thanks.

Last edited by viper_04649; 03-10-11 at 09:28 AM.
viper_04649 is offline   Reply With Quote
Old 03-10-11, 09:47 AM   #2
FastJake
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Madison, Wisconsin
Bikes:
Posts: 7,574
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by viper_04649 View Post
Since is has been working with the inner ring and spacing on the rear cog as a ss, i would just remove the outer spacer, add a thinner, the take care of the crank thickness, add the smaller cog, then spacers to space out the rest of the cassette.
I can't quite make out what you're trying to say here, but it sound like you should be all set. I had an SS MTB setup as a "two speed" for a while and it worked well. I think I had 40/25 for offroad and 48/20 for on road. My horizontal dropouts were plenty long enough to accommodate the three tooth difference between the ratios. As far as spacing is concerned, just measure the distance between the two chainrings. That should be the same as the distance between your two cogs.

Horizontal or vertical dropouts? Chain tensioner or no?
FastJake is offline   Reply With Quote
Old 03-10-11, 10:00 AM   #3
viper_04649
was fixed, now i am free
Thread Starter
 
Join Date: Oct 2006
Location: Boston
Bikes: Royal H Rando, IRO Mark V Pro, Redline Monocog 29er
Posts: 148
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
horizontal dropouts, but i need to keep the same distance since will be using disc brakes. I am just looking for what width spacers people use. I could measure, but don't have calipers so not sure of the accuracy. Trying to find out if there is a standard width.
viper_04649 is offline   Reply With Quote
Old 03-10-11, 10:33 AM   #4
Retem
Paste Taster
 
Retem's Avatar
 
Join Date: May 2006
Location: Sacramento, CA
Bikes: , Jury Bike, Moto Outcast 29, Spicer standard track frame and spicer custom steel sprint frame.
Posts: 4,392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
do a retro direct set up or get a SA kick back hub dude shred the mountain old school
btw as long as you have enough space for the pins and plates of the chain between the cogs you should be ok
Retem is offline   Reply With Quote
Old 03-10-11, 10:50 AM   #5
zacked
-
 
Join Date: Mar 2006
Location: Banned in DC
Bikes:
Posts: 454
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chainrings are usually spaced about 5mm apart, is that what you are asking?
zacked 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 02:42 AM.