Jeff Wills wrote:
> Etaoin Shrdlu <
[email protected]> wrote in message news:<
[email protected]>...
>> Jasper Janssen wrote:
>>
>>> On Tue, 10 Jun 2003 09:21:13 +0100, "panda" <
[email protected]> wrote:
>>>
>>>> I have a nexus 7spd, and some time ago purchased a different size cog for the hub. question is
>>>> , how easy is it to change these things?
>>>
>>> IIRC, Nexus use the same cog attachment as Sturmey Archer have used for a long time (ie, three
>>> fairly small halfmoon bumps in a fairly large hole), held on by a lockspring. You'd need to
>>> remove the wheel, grab a couple of old screwdrivers, pry off the lockspringring,
>>
>> Using screwdrivers to remove a lockspring is dangerous to you and to the lockspring Go out & buy
>> a pair of pliers specially designed for this task
>>
>
> There's no special tool for removing the Sturmey/Shimano snapring- removing it was a matter of
> carefully prying it off with narrow screwdrivers. (That's what they taught us in Schwinn school.)
> It doesn't have the holes for conventional snapring pliers.
>
> Here's an exploded view:
>
http://www.shimano-europe.com/cycling/phpimages/product/exp_view/SG_7R42.pdf
> and here's the service instructions:
>
http://www.shimano-europe.com/cycling/phpimages/productserie/service_pdf/7R42A.pdf
>
> Note that you will have to remove and reinstall the shift mechanism to get at the sprocket
> snapring.
>
> Jeff
cheers for that jeff. last night i swapped the sprocket with the use of a small screwdriver. it was
indeed easy, and did take 15mins! so thanks very much!
panda