Jerry
Actually, that is exactly the reason!
They made 16T cogs that fit a normal track hub, but the 12-15's could not be made cause there would not be enough metal.
A normal 1/2 inch pitch cog in 16T size measures almost exactly 7 cm in outside diameter (top of tooth to opposite top of tooth).
A 10 pitch cog in 16T size measures only 5.5 cm.
Ken Sanford Kensington, MD
-----Original Message----- From: classicrendezvous-bounces@bikelist.org [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Jerome & Elizabeth Moos Sent: Monday, December 11, 2006 8:24 AM To: wesoishi@aol.com; classicrendezvous@bikelist.org Subject: Re: [CR]WTT Shimano 10 pitch track wheels
Still doesn't seem to make any sense why they used a smaller thread on the hub, unless with the smaller pitch, they couldn't get down to the smallest desired cog without the OD becoming too small. That seems unlikely, though.
Regards,
Jerry Moos Big Spring, Texas
wesoishi@aol.com wrote: The way I figured this out was I was putting an Eimei keirin bike together and when I went to put the usual 15T track cog on, it went all the way to the hub flange and didn't even begin to thread. Damn! Measuring just now, the thread diameter is 33mm, while the usual track/freewheel hub is 35mm.
On this topic, I have heard arguments that for a given, equal gear inch, the combination that uses a smaller chainring is faster accelerating. That is is say, 50 x 16 is slower than 44 x 19 (one is 84 and the other is 84.9, but you get my drift). Is this why Shimano 10 was made?
Wes Oishi LA CA USA
-----Original Message----- From: jerrymoos@sbcglobal.net To: wesoishi@aol.com; classicrendezvous@bikelist.org Sent: Sun, 10 Dec 2006 7:28 PM Subject: Re: [CR]WTT Shimano 10 pitch track wheels
So then, is the thread on 10-pitch wheels different from that on conventional track wheels? I thought maybe it was only the cogs, chainwheels and chain that were different.
Regards,
Jerry Moos Big Spring, TX
wesoishi@aol.com wrote: I probably bought this at some bike swap without knowing it was Dura Ace 10 pitch system. Super Champion Arc-En-Ciel tubular rims (within timeline?), 36H. No lock ring or cog. Trade for any track wheelset.
I saw a 1961 Olmo on the road today. I talked to the owner, who has had it since day one. He said he rode it all over SoCal. From the description of his jaunts, he and his friend covered some ground. Bicycles were a way of exploring the world, before we reached age 16 (when we could drive). I don't think kids use bikes in this manner anymore (if at all?).
Very amusing and informative discourse on framebuilders e-group, involving Baylis (ONE "s" ok!), Dazza, Sachs, Fattic, etc etc. Everyone is friends again, so all is well.
DO NOT try to stop your brakeless bicycle by putting your hand on the WRONG side of the fork. One person I know was attempting to wipe his tire in this manner, got his hand caught, did an end-O and messed himself up pretty good.
Wes Oishi SoundCycles Los Angeles CA USA
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