This has certainly turned into a fun thread! It has all the best aspects of C&V. Nice little related rabbit trails to follow which lead back to the main path.

bulgie I'm looking forward to seeing your Twinn unveiled. Sounds like a great project.

ShannonM the lack of a Suntour 36T A sprocket literally makes no sense. Why would Suntour jump from 34T to 38T without a 36T? After all they produced 30-32-34 and 38, and rated a few of their RDs at 36T. As best I know, the biggest Shimano made at that time was 34T, Sachs made a 32T, and Regina a 31T, which were the three big freewheel producers in the late '80s to early '90s. A 36T from Suntour would seem obvious.

steelbikeguy that's cool that you were able to meet Chuck and grab a photo or your bike next to his with the unique and custom RD. I use a mirror on my glasses for all rides, but I've never used his version.

OK, this now makes negative sense.

Suntour produced, and advertised, a rear derailleur rated for a 36-tooth cog that nobody made? I mean, if Shimano had one, it would make sense in an "ours can do that too" kinda way. Still stupid, but I can see it.

But if nobody else made a 36? That's crashing-into-Mars-because-units level stupid. I know, and live by, the old saw about malice and incompetence, but when you're dealing with this kind of bogosity, how the frack can you tell? This is so dumb that the more I learn about it, the more it micturates me off.

The only reason that this isn't a canonical example of Occam's Spork is the amount of exposition you'd have to do for anyone who wasn't a total bike nerd.

--Shannon

I had some spare time to sort sprockets and whatnot today.

Here's the rare and highly sought after, wide-range New Winner 7-speed is criterium ready, and can double for gravel grinding. :p
https://cimg7.ibsrv.net/gimg/bikefor...00e315d016.jpg
From racing criteriums, to mountain summits, to stump pulling, this baby does it all.

May I ask, "How low (or high) can you go--- and still be vintage?" One X Twelve? What's the big deal?!? Pair this New Winner with a 50-30 crank set and you can conquer the world. :innocent:

Wow, Bob, that’s a unique 7-speed freewheel with 8 cogs!

yeah... how does it work with the small cogs?
I'm guessing that you've got a L cog threaded onto an X cog? ... although I'm still wondering about the 11T cog. That must have been after the New Winner era?

To explain the cogs a bit, SunTour made some cogs that included a threaded extension that another cog could be threaded onto. See the drawing below to get a hint of what the L and X cogs were....


https://cimg7.ibsrv.net/gimg/bikefor...26667b5f9c.jpg
This is from the New Winner manual and cog board.

Steve in Peoria
(I've got some spare X and L cogs, in case anyone wants to play around. I'm sure not going to use them)

pastorbobnlnh woah. Double cool. Is this another you have built? What kind of mech have you used with this freewheel? Have you written up a thread about it? If not, I hope you do!

steelbikeguy Id love to mess around and learn how to make cool freewheels, but I know I can’t start a new project for a couple months. If your offer/inventory still stands I’d love to take you up on them.

I’m somewhat certain that the 11-tooth cog appeared with the New Winner Pro freewheel and was only supposed to work with Regular-6 spacing. I’d love to see Pastor Bob’s setup- it wouldn’t be the first time my dusty memories were incorrect.

:eek: Obviously my mathematical acuity is waning in my retirement years!!!

I just pulled sprockets out of the organizer and started seeing what I could thread together and then mount to an empty New Winner body I have sitting in reserve. I just assumed it was a 7-speed but I'm glad Neal caught my big mistake.

What you are not seeing is the incredibly wide gap between the 12T and the 14T. It is wider than a normal 5-speed gap between sprockets. The remaining gaps are the normal Suntour Ultra spacing.

I just built it this afternoon for poops and giggles. :roflmao2:It has not been mounted nor ridden and I dismantled it immediately after I took the picture. It was very much a tongue in cheek endeavor.

my collection of cogs was passed along to me from a friend that had scoured the local shops for their old SunTour cog collections.. back when those had fallen out of fashion. Over the years, the popular cogs all got used up, so my collection is largely just the weird stuff. Not entirely, but I've got some weirdly large piles of cogs.

For example, I've got a number of various flavors of 16 tooth cogs. About 11 threaded cogs (T16), 8 of the dual threaded X cogs, and 15 of the 5 spline A cogs. I'm a little surprised that the T16 cogs are left, but not many folks are using X16 or A16 cogs.


https://cimg0.ibsrv.net/gimg/bikefor...80ba3b20fa.jpg


Still, if someone is looking for a specific cog, let me know.

I'll also note that the spacers are also important, especially if you are coming up with a new cog arrangement. I've got a weird assortment of spacers too, so let me know what is needed. I'll just assume that Pastor Bob has a better inventory than me!

Steve in Peoria