6 speed to 7 speed upgrade, mountain bike

wrote:
Just look for lock ring and it a cassette. If it
doesn't have one its a freewheel.

Or a six speed cassette

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

wrote:

Just look for lock ring and it a cassette. If it
doesn't have one its a freewheel.

Andy Muzi wrote:

Or a six speed cassette

I have an illustrated Web page that shows how to tell the difference
betwixt freewheels and cassettes:

http://sheldonbrown.com/free-k7

Sheldon "http://sheldonbrown.com/" Brown
+----------------------------------------------------+
| War is God's way of teaching Americans geography. |
| -Ambrose Bierce |
+----------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

David wrote:
=20
FWIW, I've seen both 6-speed FW and cassette on late 80s MTBs. The
only 6-speed cassette I've
seen was Exage or similar (Exage Mountain?) low-end Shimano.
=20
wrote:
=20
Long, long ago, *all* of Shimano's lines included 6-speed cassettes,
from Dura-Ace:
http://www.sheldonbrown.com/shimano1982/pages/21.html
down to Adamas:
http://www.sheldonbrown.com/shimano1982/pages/33.html

While Shimano _offered_ this option, very few bike makers actually=20
_bought_ them, so they're quite rare on the ground.

When Shimano moved to 7-speed, they initially only offered it in the=20
cassette format except for the high-priced Dura-Ace and Sant=E9 line.=20
This marketing move was what finally caused OEMs to start specing=20
Shimano Freehubs on bikes, 'cause it was the only way to do 7-speed SIS.

Clever scheme on Shimano's part that turned them from a minor hub=20
supplier to the dominant one.

(Adamas? Wasn't he on "Battlestar Galactica"?)

Or was it Space 1999?

Sheldon "Cyclehistory" Brown
+---------------------------------------------------+
| Violence is the last refuge of the incompetent. |
| --Salvor Hardin (Isaac Asimov) |
+---------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com