replacing cogwheels on a Shimano cassette?

[cow2215]

hi all,

question: i finally got around to replacing the chain on my bike, and sure enough i need to replace my cogs as well.

i use my mtb mainly to tool around town, so the wear is essentially all on my 6th and 7th cogwheels on my rear cassette (a shimano ?HG from circa 1991, 11-?28)

from what i remember the last/smallest 3-4 rings on the cassette are removeable from the rest of the cassette...i'm pretty sure the progression is 11-12-14 because i bought a 13t ring to switch it to 11-12-13 but never got around to it. )

is it still possible to get individual cogwheels for this cassette? or will i have to get a new cassette?
(i can't remember what company i ordered the original cogwheel from, but they sold a LOT of small parts individually, with a B&W catalog on newsprint??)

thanks in advance

 

[Bald Headed Joh]

On Thu, 01 May 2003 04:00:37 +0950, cow2215 wrote:

> hi all,
>
> question: i finally got around to replacing the chain on my bike, and sure enough i need to
> replace my cogs as well.
>
> i use my mtb mainly to tool around town, so the wear is essentially all on my 6th and 7th
> cogwheels on my rear cassette (a shimano ?HG from circa 1991, 11-?28)
>
> from what i remember the last/smallest 3-4 rings on the cassette are removeable from the rest of
> the cassette...i'm pretty sure the progression is 11-12-14 because i bought a 13t ring to switch
> it to 11-12-13 but never got around to it. )
>
> is it still possible to get individual cogwheels for this cassette? or will i have to get a new
> cassette? (i can't remember what company i ordered the original cogwheel from, but they sold a LOT
> of small parts individually, with a B&W catalog on newsprint??)
>
> thanks in advance

http://www.sheldonbrown.com/harris/k7.html#sprockets

 

[Grenouil]

"cow2215" <[email protected]> wrote in message news:[email protected]...
> hi all,
>
> question: i finally got around to replacing the chain on
my bike, and
> sure enough i need to replace my cogs as well.
>
> i use my mtb mainly to tool around town, so the wear is
essentially all
> on my 6th and 7th cogwheels on my rear cassette (a shimano
?HG from
> circa 1991, 11-?28)
>
> from what i remember the last/smallest 3-4 rings on the
cassette are
> removeable from the rest of the cassette...i'm pretty sure
the
> progression is 11-12-14 because i bought a 13t ring to
switch it to
> 11-12-13 but never got around to it. )
>
> is it still possible to get individual cogwheels for this
cassette? or
> will i have to get a new cassette? (i can't remember what
company i
> ordered the original cogwheel from, but they sold a LOT of
small parts
> individually, with a B&W catalog on newsprint??)
>
> thanks in advance
>
>
>
> --
> >--------------------------<
> Posted via cyclingforums.com http://www.cyclingforums.com

Seven/eight speed Shimano cassettes can be taken apart - you may have to grind out the three rivets
or unscrew the three bolts that hold together the largest sprockets

But it'll be cheaper to replace the whole cassette - if you shop around you can still find new seven
speed (I'm assuming you need seven speed?) Shimano HG50 or HG70 cassettes in several different sizes
- I just bought a 13-28 HG70 for about $20, and the same place had HG50's for about $15.

You should probably change the chain as well...