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


Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 07-14-14, 09:56 AM   #1
1987
Senior Member
Thread Starter
 
1987's Avatar
 
Join Date: Oct 2011
Bikes: Cinelli SC 1971, Daccordi 1985
Posts: 775
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Are freewheels with skip tooth ok?

I just noticed some large cogged freewheels on eBay. Some had skip tooth on the largest cogs. Is that safe? Better gear shifting?
1987 is offline   Reply With Quote
Old 07-14-14, 10:36 AM   #2
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 18,221
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quoted: 757 Post(s)
Yes, they're fine. And you're right; this was done to improve shifting, but the improvement isn't dramatic. Modern hyperglide profile cogs are a much more noticeable improvement.
JohnDThompson is offline   Reply With Quote
Old 07-14-14, 10:41 AM   #3
1987
Senior Member
Thread Starter
 
1987's Avatar
 
Join Date: Oct 2011
Bikes: Cinelli SC 1971, Daccordi 1985
Posts: 775
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Thanks

Here is one:
1987 is offline   Reply With Quote
Old 07-14-14, 10:54 AM   #4
michael k
Senior Member
 
michael k's Avatar
 
Join Date: Sep 2009
Location: Portland,Or
Bikes:
Posts: 1,072
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Put one on my Moto,shifting was very smooth.

michael k is offline   Reply With Quote
Old 07-14-14, 12:06 PM   #5
1987
Senior Member
Thread Starter
 
1987's Avatar
 
Join Date: Oct 2011
Bikes: Cinelli SC 1971, Daccordi 1985
Posts: 775
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Quote:
Originally Posted by michael k View Post
Put one on my Moto,shifting was very smooth.

Nice setup. No risk of over shift with the skip tooth FW? Suntour Cyclone MarkII GT?
Cats always makes a photo better.
1987 is offline   Reply With Quote
Old 07-14-14, 12:07 PM   #6
Metacortex
Senior Member
 
Join Date: Apr 2011
Bikes: Fillet-brazed Schwinns
Posts: 2,195
Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 139 Post(s)
That design was introduced by Shimano (and Schwinn) in 1971. As described in the '72 Shimano catalog, alternate teeth were used on the largest two cogs in the 14-32T or 14-34T wide-range freewheels, which enabled significantly faster shifting onto the large cogs: Shimano Bicycle Parts - 72 page 12

Schwinn used these freewheels on the Sports Tourer and World Voyageur/Voyaguer II

Metacortex is offline   Reply With Quote
Old 07-14-14, 01:33 PM   #7
michael k
Senior Member
 
michael k's Avatar
 
Join Date: Sep 2009
Location: Portland,Or
Bikes:
Posts: 1,072
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Quote:
Originally Posted by 1987 View Post
Nice setup. No risk of over shift with the skip tooth FW? Suntour Cyclone MarkII GT?
Cats always makes a photo better.

Thank you

Friction shift,there is always as you say a risk. especially on rough roads.

Suntour Vgt...or some variation of the alphabet.
michael k is offline   Reply With Quote
Old 07-14-14, 02:51 PM   #8
Lascauxcaveman 
Senior Member
 
Lascauxcaveman's Avatar
 
Join Date: Nov 2011
Location: Port Angeles, WA
Bikes: A green one, "Ragleigh," or something.
Posts: 5,775
Mentioned: 97 Post(s)
Tagged: 0 Thread(s)
Quoted: 643 Post(s)
Quote:
Originally Posted by Metacortex View Post
That design was introduced by Shimano (and Schwinn) in 1971.



I thought the skip-tooth design was fairly common as far back as the 1930s; on chain rings and larger cogs?
__________________
● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1972 Peugeot UE-18 Mixte ● 1980 Apollo "Legnano" ● 1982 Bianchi Limited ● 1984 Nishiki Landau ● 1984 Peugeot Vagabond ● 1985 Trek 600 ● 1985 Shogun Prairie Breaker ● 1986 Univega Nuovo Sport ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Trek 400 ● 1990 Cannondale ST600 ● 1990 Technium Pro ● 1993 Technium RT600 ● 1996 Kona Lava Dome ● And a Bike to Be Named Later ●
Lascauxcaveman is online now   Reply With Quote
Old 07-14-14, 03:14 PM   #9
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Posts: 5,233
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Quote:
Originally Posted by Lascauxcaveman View Post


I thought the skip-tooth design was fairly common as far back as the 1930s; on chain rings and larger cogs?

I believe those earlier skip-tooth and inch-pitch cogs/rings weren't for derailer shifting.

My mid-1970's Viscount came with a big Shimano skip-tooth freewheel. I never used that freewheel though, and installed a 7sp freewheel after adjusting the axle spacing.

Has anyone here tried using modern chain on any of the pre-uniglide Shimano freewheels? I have one here that is only a 14-24t and so doesn't have any skip-tooth cogs, but it's essentially the same freewheel as the bigger ones with skip tooth larger cogs. It came off another mid-70's Viscount.
dddd is offline   Reply With Quote
Old 07-14-14, 04:13 PM   #10
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 18,262
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 407 Post(s)
Quote:
Originally Posted by dddd View Post
... Has anyone here tried using modern chain on any of the pre-uniglide Shimano freewheels? I have one here that is only a 14-24t and so doesn't have any skip-tooth cogs, but it's essentially the same freewheel as the bigger ones with skip tooth larger cogs. It came off another mid-70's Viscount.
I use SRAM PC-58 chains on most of my bikes, irrespective of the vintage or tooth profile of the freewheel.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324
Capo: 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Old 07-14-14, 04:54 PM   #11
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Posts: 5,233
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 61 Post(s)
Quote:
Originally Posted by John E View Post
I use SRAM PC-58 chains on most of my bikes, irrespective of the vintage or tooth profile of the freewheel.
That's a very nice chain.

I only asked because I've had modern 8s chain sometimes not get along with certain older French-bike freewheels and on Varsities with those Shimano-made, Schwinn-approved sealed freewheels. It was a matter of chain skating atop the cog edges.
dddd is offline   Reply With Quote
Old 07-14-14, 05:17 PM   #12
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Bikes: Several, mostly not name brands.
Posts: 18,221
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quoted: 757 Post(s)
Quote:
Originally Posted by Lascauxcaveman View Post
I thought the skip-tooth design was fairly common as far back as the 1930s; on chain rings and larger cogs?
What's commonly referred to as "skip tooth" when discussing drivetrains of that era are actually 1" pitch drivetrains, as opposed to the 1/2" pitch drivetrains standard now.
JohnDThompson is offline   Reply With Quote
Old 07-14-14, 05:46 PM   #13
browngw 
Adventure Rider
 
browngw's Avatar
 
Join Date: Mar 2012
Location: Port Dover Ontario Canada
Bikes: 1958 Sun Cresta, 1971 Robin Hood Sports, 1976 SuperCycle Excalibur, 1979 Raleigh DL1 Tourist, 2014 Salsa Vaya, 2016 Giant ATX27.5, 2012 Giant Halfway Folder, and others
Posts: 789
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 51 Post(s)
Having my first experience with this Shimano freewheel from my 1976 SuperCycle Excalibur (Bridgestone). Seems to work just fine. Currently bringing this bike back to like new condition.


FYI, I've located Canadian Tire's 1976 description of your Supercycle
Excalibur bike:
"Excalibur is our best 10 speed and it's loaded with features.It's built
by Bridgestone and comes with their super lightweight Technart die-cast
frame.Wide ratio, multiple gearing gives everything from low-low to
extra-high forcross-country work.Shift levers are ratchet type for
positive selection.Reflectors all round.Black padded saddle.Lots of
features in good looks department, two chromed forktips and a beautiful,
pearlescent mariner blue finish.It's a SUPERCYCLE to compare with the
best.71-1085X - Men's 21" or 23" frame; 27" wheels.".

Drew

Attached Images
File Type: jpg DSCF1784.jpg (94.5 KB, 25 views)
File Type: jpg DSCF1787.jpg (101.0 KB, 24 views)
__________________
We are what we reflect. We are the changes that we bring to this world. Ride often. -Geo.-
browngw 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 09:04 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION