Re: [CR] Dura Ace 6 and 8 sp hub swapping

(Example: Framebuilding:Brazing Technique)

Date: Thu, 02 Dec 2004 01:08:02 +0100
Subject: Re: [CR] Dura Ace 6 and 8 sp hub swapping
From: <"mg@formlos.ch">
To: classicrendezvous <classicrendezvous@bikelist.org>
In-Reply-To: <7d.5da498df.2edf661b@aol.com>
cc: Tom Dalton <tom_s_dalton@yahoo.com>
cc: Jpinkowish@aol.com
cc: Tom Dalton

to all those of you, sharing their experience with early dura ace hubs: thanks for your replies and helpful hints.

Fred wrote:
> There's a good article by Sheldon Brown on this:
> http://www.sheldonbrown.com/k7.html great! it contains a quite detailled description of the whole operation.

tom dalton wrote:
> The best way to tell is to pull the axle on the EX and look for a set of
> splines just inside the edge of the bearing race at the end of the inner body.
> If the splines are there, the bodies may actually interchange. Then you just
> need to find that tool, which was used on hubs made through 1996 or so, and
> should still be available.

i disassembled both axles. the lockrings holding the bodies to the hub look quite similar at first glance. they both have 8 splines about 1.5mm wide. i first have to get the remover-tool you pointed me and ill have a try next weekend! i let you know if i succeed!

i totally agree with tom regarding shimano compatability. my EX 6-sp rear derailer even works with 9sp HG cassettes when i use the apropriate narrow chain! i won't complain when 25 years later i still can buy more or less matching new parts! where else in industry can you get that? and besides you still get nos parts on the web or even at local dealers.

ride hard

martin --


> Von: Jpinkowish@aol.com
> Datum: Wed, 1 Dec 2004 13:23:23 EST
> An: mg@formlos.ch
> Betreff: Re: [CR]your Dura Ace 6 and 8 sp hub swapping
>
> In a message dated 11/30/04 8:17:20 PM EST, mg@formlos.ch writes:
>
>> is it possible to just swap the freewheels resp. the cassette bodies? how is
>> that done? and what tools do i need? if anyone has done this before or is
>> experienced with these older parts i would be grateful for help.
>>
>
> Hi Martin,
> I'm a little late with this reply, but here are my suggestions.
> Assuming that your Dura Ace 6sp hub is the 7400 hub.....
>
> To swap the freehubs:
> --you need the Shimano tool # TL-FH10 to remove and swap the freehubs. A
> bicycle shop should have the tool. This is 15 minutes to first remove the
> cassette cogs and then remove and swap the freehubs.
> --You can buy this tool from http://www.loosescrews.com(Ashland, Oregon USA). Their
> part number for this tool is #SH-FH10, and it is $13US. Have them ship it to
> you using the US Postal Service Priority Mail for about $15-20US. This ship
> cost is 1/3 of UPS, FedEx, or DHL.
>
> To swap cogs:
> --The uniglide splined cogs used in Dura Ace 7400 6/7sp and Dura Ace 7402 8sp
> cassettes are interchangeable. Only the spacer width changes. If 7 speeds
> is sufficient, you can make a 7sp cassette using your Dura Ace 6sp cassette
> hub
> wheel by transferring 5 of the splined uniglide cogs AND THEIR SPACERS from
> the 8sp hub to your 6sp hub. For the position 2 cog, you will need to use one
> with the splined spacer attached. For the position 1 screw on cog, use the
> one from the 8sp cassette.
> --If you just want a wider geared 6sp cassette, use the appropriate cogs from
> the 8sp hub and use the original 6sp spacers.
>
> I tried getting 8 cogs onto my Dura Ace 7400 6sp hub, but could only fit 7
> using the scheme I outline above.
>
> For your info, here are spacer widths:
> 6sp -- 3.8mm
> 7sp -- 3.1mm
> 8sp -- 3.0mm
>
> Hope that helps.
>
> Jan Pinkowish
> Bristol, CT USA