Campy rear derailleurs excessive dish and Ergo speed changes to freewheel/cassette



J

jim beam

Guest
A Muzi wrote:
>>>> On 2007-01-11, [email protected] <[email protected]>
>>>> wrote:
>>>>> ddog wrote:
>>>>>> Campy rear derailleurs require excessive dish according to
>>>>>> Rivendell's site, but did not see any follow up information.
>>>>> I'll presume you typed this incorrectly. If Rivendell really said
>>>>> dish is attributable to the rear derailleur, they are as clueless
>>>>> as a rock about bicycles. Rear derailleurs have nothing to do with
>>>>> wheel dish. Campagnolo rear hubs have more dish than 9/8/7 speed
>>>>> Shimano hubs. Cassette hubs. Due to bearing placement. I think
>>>>> Shimnao uses the steel hub body itself to support the outermost
>>>>> bearing while with Campagnolo the outermost bearing is in the hub
>>>>> shell itself.
>>> Ben C wrote:
>>>> Campagnolo hubs do have bearings inside the freehub part. Two sets
>>>> in the freehub and two in the hub body.
>>>> The difference, as I understand it, is that on a Shimano hub, the
>>>> freehub and hub body are one-piece. On a Campag on they're just sort
>>>> of slotted together and it's all held there by nuts at the ends.
>>>> But I may still have this wrong. Hopefully someone will correct.
>>> not all that complex:

>
>> I<[email protected]> wrote:
>>> http://www.yellowjersey.org/photosfromthepast/CANEWHUB.JPG

>
> Tim McNamara wrote:
>> ISTR the reason that Campy hubs require more dish is that Campy used a
>> slightly wider cog spacing which made their 8 speed cassettes wider
>> than Shimano's 8 speed cassettes. I don't know that I am remembering
>> correctly, of course, nor whether- II do RC- this is still the case
>> with 9 and 10 speed cassettes being the dubious norm.

>
> I believe you're correct. Sorry, I couldn't recall the photo name until
> now. Here it is:
>
> http://www.yellowjersey.org/photosfromthepast/yeasowat.jpg
>
> 'Yeah? So what?' sums up my opinion.
>

the "so what" is that it makes 10-15% difference in tension ratio
between drive and non-drive spokes. don't you have another pic where
the axle nuts are aligned, not the hub flanges?