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Are freewheels with skip tooth ok?

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Are freewheels with skip tooth ok?

Old 07-14-14, 09:56 AM
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1987
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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?
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Old 07-14-14, 10:36 AM
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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.
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Old 07-14-14, 10:41 AM
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Thanks

Here is one:
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Old 07-14-14, 10:54 AM
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Put one on my Moto,shifting was very smooth.

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Old 07-14-14, 12:06 PM
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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.
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Old 07-14-14, 12:07 PM
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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

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Old 07-14-14, 01:33 PM
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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.
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Old 07-14-14, 02:51 PM
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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?
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Old 07-14-14, 03:14 PM
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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.
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Old 07-14-14, 04:13 PM
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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.
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Old 07-14-14, 04:54 PM
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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.
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Old 07-14-14, 05:17 PM
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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.
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Old 07-14-14, 05:46 PM
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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

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