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 08-18-09, 12:20 PM   #1
nimbuscrenel
Senior Member
Thread Starter
 
nimbuscrenel's Avatar
 
Join Date: Mar 2007
Location: Boise, ID
Bikes:
Posts: 185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Freewheel replacement...

I want to replace the singlespeed freewheel on a wheel I'm going to use for my conversion. I was going to order a new one and then saw that there is metric and english threaded models. How do I figure out which one I need? The freewheel currently installed says "MAIN DRIVE 1/2x1/8 (c7)". I had hoped the "c7" was a model number of some sort that would shed light on the threading, but so far google has failed me. Any ideas?
nimbuscrenel is offline   Reply With Quote
Old 08-18-09, 12:52 PM   #2
Xgecko
old legs
 
Join Date: Aug 2009
Bikes:
Posts: 908
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
how many teeth on the one you want to replace?.......there is only one freewheel with less than 16teeth that's not metric
Xgecko is offline   Reply With Quote
Old 08-18-09, 01:44 PM   #3
nimbuscrenel
Senior Member
Thread Starter
 
nimbuscrenel's Avatar
 
Join Date: Mar 2007
Location: Boise, ID
Bikes:
Posts: 185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
there's 16 teeth on the one I have now and I wanted to bump up to 18 or 20- I had knee surgery a while ago and don't want to push any big gears yet.
nimbuscrenel is offline   Reply With Quote
Old 08-18-09, 01:52 PM   #4
PoN
Senior Member
 
Join Date: Jul 2009
Location: Fairfield, California
Bikes: 1979 Nishiki International, 1989 Dahon folder, 1999 Nishiki Backroads, 2009 Dawes SST
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They say these are the best, rebuildable, and worth every penny...
http://whiteind.com/singlespeedgearing/freewheels.html

This place has a whole range, and even some with 2 cogs in one 16/18 17/19 (if a perfect chainline is not as important and you have the room in your dropouts to use it)
http://www.bikeman.com/White_Industr...reewheels.html
PoN is offline   Reply With Quote
Old 08-18-09, 01:54 PM   #5
PoN
Senior Member
 
Join Date: Jul 2009
Location: Fairfield, California
Bikes: 1979 Nishiki International, 1989 Dahon folder, 1999 Nishiki Backroads, 2009 Dawes SST
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
For gearing and skid patch calculations
The Gearing Primer
PoN is offline   Reply With Quote
Old 08-18-09, 02:58 PM   #6
nimbuscrenel
Senior Member
Thread Starter
 
nimbuscrenel's Avatar
 
Join Date: Mar 2007
Location: Boise, ID
Bikes:
Posts: 185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
This is good info, thanks, but I really was trying to find out what threading my current freewheel has before I buy another one. From some more poking around it looks as if it's 16 or more teeth then it's english threading, and less than 16 is metric. Does this sound correct?
nimbuscrenel is offline   Reply With Quote
Old 08-18-09, 03:06 PM   #7
PoN
Senior Member
 
Join Date: Jul 2009
Location: Fairfield, California
Bikes: 1979 Nishiki International, 1989 Dahon folder, 1999 Nishiki Backroads, 2009 Dawes SST
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It may be better to try and identify the hub to make sure of the threading that the freewheel is threaded onto.

Looks like the standard I see everywhere is 1.37" x 24 tpi

from:
http://sheldonbrown.com/harris/singl...tml#freewheels
"These have standard 1.37" x 24 tpi threads, and fit on any hub that takes a thread-on freewheel. This includes BMX hubs, track hubs, and multi-speed freewheel hubs."
PoN is offline   Reply With Quote
Old 08-18-09, 03:29 PM   #8
nimbuscrenel
Senior Member
Thread Starter
 
nimbuscrenel's Avatar
 
Join Date: Mar 2007
Location: Boise, ID
Bikes:
Posts: 185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
yeah I think that Is probably the more common threading, but then I see freewheels like the ones in the link below listed as metric and I get confused.

http://www.jensonusa.com/store/produ...reewheels.aspx
nimbuscrenel is offline   Reply With Quote
Old 08-18-09, 03:33 PM   #9
Steev
Senior Member
 
Steev's Avatar
 
Join Date: Jul 2005
Location: Backwoods of Ontario
Bikes:
Posts: 2,150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you can thread a BB lock ring on the hub then it's 1.37"x24tpi.
Steev is offline   Reply With Quote
Old 08-18-09, 03:56 PM   #10
Xgecko
old legs
 
Join Date: Aug 2009
Bikes:
Posts: 908
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
unless its left hand drive all freewheels 16t and above are common thread I have had bad experience with Dicta freewheels and good luck with ACS, AC Racing, Shimano and even the classic Suntour unless I you really want to spend a lot of money on a White Industries buy an ACS
Xgecko is offline   Reply With Quote
Old 08-18-09, 04:18 PM   #11
PoN
Senior Member
 
Join Date: Jul 2009
Location: Fairfield, California
Bikes: 1979 Nishiki International, 1989 Dahon folder, 1999 Nishiki Backroads, 2009 Dawes SST
Posts: 209
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
No tax or shipping, some larger sizes, runs about the same...
http://bikeisland.com/cgi-bin/BKTK_S...ils&ProdID=331
PoN is offline   Reply With Quote
Old 08-18-09, 04:25 PM   #12
nimbuscrenel
Senior Member
Thread Starter
 
nimbuscrenel's Avatar
 
Join Date: Mar 2007
Location: Boise, ID
Bikes:
Posts: 185
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cool, thanks everybody! my knees appreciate it!
nimbuscrenel is offline   Reply With Quote
Old 08-24-09, 04:29 PM   #13
TXBDan
Senior Member
 
Join Date: Nov 2007
Location: Boston, MA
Bikes:
Posts: 140
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hey guys,

the freewheel that came w/ my Madison started making odd noises so the shop gave me a new one. Long story, but he couldnt replace it so i have it with me. Its the same generica "India" freewheel, same 18tooth, but it has a different letter-number on it. The one on the bike says D5 and the new one says C7. What does this mean?

It looks like like the heavy inner part might be "dished" differently.. but i don't see any dish specs online anywhere when buying new ones...

?
TXBDan is offline   Reply With Quote
Old 08-24-09, 05:48 PM   #14
Xgecko
old legs
 
Join Date: Aug 2009
Bikes:
Posts: 908
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I hate Dicta freewheels they just don't feel right to me, do yourself a favor and buy an ACS Claws freewheel they are worth their cost, not the slickest out there (that honor goes to White Industries) but ACS freewheels feel a lot more solid engaging than a Dicta does
Xgecko 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 06:44 PM.