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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-28-06, 10:41 PM   #1
thomps
Junior Member
Thread Starter
 
Join Date: Jan 2006
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Freehub or Freewheel

Can one of you experts help out a complete amateur? I'm trying to determine if this Zipp Disc is Shimano compatible? I have a Shimano 9-spd bike and was wondering what it would take to make this work. Thanks
Attached Images
File Type: jpg 012805 120.jpg (57.7 KB, 89 views)
File Type: jpg 012805 119.jpg (75.0 KB, 71 views)
thomps is offline   Reply With Quote
Old 01-29-06, 01:33 AM   #2
fogrider
Senior Member
 
Join Date: Sep 2003
Location: fogtown...san francisco
Bikes: Ron Cooper, Time VXSR, rock lobster, rock lobster, serotta, ritchey, kestrel, paramount
Posts: 2,276
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
from the first photo, it look like you need a freewheel. I don't know of anyone that makes a 9 speed freewheel.
fogrider is offline   Reply With Quote
Old 01-29-06, 07:59 AM   #3
dafydd
JRA...
 
Join Date: Oct 2003
Location: philly
Bikes: trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
Posts: 839
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i see stepped threads, which would mean it's track...
dafydd is offline   Reply With Quote
Old 01-29-06, 08:06 AM   #4
dafydd
JRA...
 
Join Date: Oct 2003
Location: philly
Bikes: trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
Posts: 839
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
info on their wheels here:http://www.zipp.com/products/wheels/840900disk.shtml
dafydd is offline   Reply With Quote
Old 01-29-06, 12:58 PM   #5
Moose
mousse de chocolat
 
Moose's Avatar
 
Join Date: Jul 2001
Location: Northeast Ohio, USA
Bikes: Masi Speciale Fixed, Fuji America Fixed, "Modernized" Gitane
Posts: 1,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That is a track hub on there, not made for any gear cluster.
__________________
I feel more like I do now than when I first got here.
Moose is offline   Reply With Quote
Old 01-29-06, 12:58 PM   #6
Moose
mousse de chocolat
 
Moose's Avatar
 
Join Date: Jul 2001
Location: Northeast Ohio, USA
Bikes: Masi Speciale Fixed, Fuji America Fixed, "Modernized" Gitane
Posts: 1,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That means you can't use it, so send it to me.
__________________
I feel more like I do now than when I first got here.
Moose is offline   Reply With Quote
Old 01-29-06, 06:37 PM   #7
bikemeister
Senior Member
 
Join Date: Jan 2006
Location: Tucson, AZ
Bikes:
Posts: 771
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just saw online last week that Sachs made 6,7, and 8 speed freewheels - and some bike shop had them for sale. I can't guarantee the Sachs (German) will index correctly with Shimano. Search for that Sachs site. They had chain and spacer widths listed - maybe you'll get lucky and it will work with an extra click leftover.
bikemeister is offline   Reply With Quote
Old 01-29-06, 06:42 PM   #8
ivan_yulaev
Senior Member
 
Join Date: Mar 2004
Location: San Diego, CA
Bikes: See sig.
Posts: 1,651
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Track hub, that means fixed gear or single speed freewheel.
ivan_yulaev is offline   Reply With Quote
Old 01-29-06, 06:55 PM   #9
mactheknife68
Always find my way home
 
Join Date: Dec 2005
Location: Kankakee, IL
Bikes: Madone, 8500
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Moose
That is a track hub on there, not made for any gear cluster.
Dunno if you noticed but that is a gear cluster..Likely Sachs as I can see the made in france stamp on the small cog
mactheknife68 is offline   Reply With Quote
Old 01-29-06, 07:00 PM   #10
Moose
mousse de chocolat
 
Moose's Avatar
 
Join Date: Jul 2001
Location: Northeast Ohio, USA
Bikes: Masi Speciale Fixed, Fuji America Fixed, "Modernized" Gitane
Posts: 1,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by mactheknife68
Dunno if you noticed but that is a gear cluster..Likely Sachs as I can see the made in france stamp on the small cog
Intresting, I have never seen a freewheel that'd thread on in the middle of the cluster like that. I assumed he had just slipped a shimano cassette over the existing hub, but now that you point it out I realize you couldn't do that (wouldn't fit)
__________________
I feel more like I do now than when I first got here.
Moose is offline   Reply With Quote
Old 01-29-06, 07:05 PM   #11
Moose
mousse de chocolat
 
Moose's Avatar
 
Join Date: Jul 2001
Location: Northeast Ohio, USA
Bikes: Masi Speciale Fixed, Fuji America Fixed, "Modernized" Gitane
Posts: 1,141
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
So that hub was designed for dual purpose as a freewheel or fixed eh? Neat stuff!
__________________
I feel more like I do now than when I first got here.
Moose is offline   Reply With Quote
Old 01-29-06, 07:12 PM   #12
mactheknife68
Always find my way home
 
Join Date: Dec 2005
Location: Kankakee, IL
Bikes: Madone, 8500
Posts: 190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by dafydd
i see stepped threads, which would mean it's track...
Those arent stepped threads, its the nondrive side of the hub body.
mactheknife68 is offline   Reply With Quote
Old 01-29-06, 10:02 PM   #13
thomps
Junior Member
Thread Starter
 
Join Date: Jan 2006
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the info everyone. The guys at the LBS weren't able to help me on this. I should have mentioned that the photos are of each side of the wheel. The bare threads are on the opposite side of the cogset.
thomps is offline   Reply With Quote
Old 01-30-06, 01:40 AM   #14
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,600
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
AH, so a dual-purpose wheel, neat! Fixed-gear track cog on one side and you flip it over and you have freewheel!

While you can make a 9-speed freewheel like I did 12 years ago when 8-spd was de-rigeur, I don't think it makes much of a difference. I had a 13-24t 8-speed Sachs freewheel similar to what you've got and I ground down a 12t Suntour cog to the proper thickness for Shimano spacing. Then brazed it on top of the 13t cog on the freewheel (removed the cog from freewheel 1st ). Since there weren't any 9-spd shifters on the market, I had to use friction-shifting, no big deal.

I did however, have to move a 5 washer from the left side of the axle to the right to give enough room to clear the extra cog (and redish the wheel). This ended up bending axles every two years or so. Although the large-diameter axle on that Zipp wheel looks pretty beefy, but I'm not sure how adjustable the hub-spacing is. You'd really have to get a longer axle and widen the spacing to 135mm in order to accomodate the wider freewheel while keeping the disc centered.

What you can do with that wheel however, is to remove the cogs from the freewheel and grind/replace the spacers between the gears. You want to narrow the spacing (c-c) between the gears from 4.8 to 4.34mm to have it match the 9-speed Shimano spacing. You may also need to add spacers on the hub-body itself to move the freewheel laterally so that the gears are in the same location as the Shimano cluster. Do this by measuring the distance between the drop-out to the 2nd gear on the Shimano 9-spd. This distance should then be the distance between the drop-out to the 1st gear on the Sachs freewheel. What you'll end up with is an 8-speed freewheel, with Shimano 9-speed spacing. Basically a 9-speed with the smallest cog removed. Then adjust your RD's limit screw to not go into the smallest cog, or just remember not to shift into it.

If this doesn't make sense, I can draw some pictures.

Last edited by DannoXYZ; 01-30-06 at 01:46 AM.
DannoXYZ 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 04:28 AM.