now with 50 percent more EVILJoined: 22 Jul 2005Posts: 10566
so last night i brought my bike into the wrench party, found out that my rear wheel is a hub made for 7 speeds. 7 speed sti shifters are a pain to find, so we came up with a work around in order to get some 9 speed sti shifters to theoretically work (according to sheldonB)
we put on a 9 speed cassette on the rear, but we took off one of the larger gears. making it an 8 speed rear, and it fit fine.
i was then going to get a 9 speed shifter/brake set and just have one dead spot on the rear gear
my question is, do i have to use a 9 speed sti set up, or since i went down to 8 speeds on the back, can i be ok with this 8 speed shifter and bar set?
or is the spacing on my cassette specific enough that i should stick with a 9 speed shifter set and the dead spot?
sekai
Posted: Tue Jan 24, 2006 2:12 pm
Joined: 25 Jul 2005Posts: 1466Location: on the lake
i ran 8 speeds with 9speed sti, i had to double click to get out of the lowest cog, but really, no problems. i raced it this way my 1st year.
derrickito
Posted: Tue Jan 24, 2006 2:20 pm
now with 50 percent more EVILJoined: 22 Jul 2005Posts: 10566
but a 9 speed rear converted to 8 speed, running with 8 speed sti.
thats where im worried there might be problems. basically an 8 speed set up, but the rear converted from 9. will that work is what im asking.
i might not be clear enough on how im phrasing it
joeball
Posted: Tue Jan 24, 2006 3:06 pm
Joined: 24 Jul 2005Posts: 6037Location: Ether
IIRC Sheldon the theory behind the 8 of 9 on 7 is that you remove a cog from the 9speed cassette so the total cassette width is less than a full 9speed and thus fits on a 7speed free hub body. The spacing between the cogs is then 9speed Sti specific, each click of the shifter moves the derrailure the same distance as the spacing of the cogs. So in the end you have the overall width of a 7 speed cassette and the spacing of a 9speed but only 8 gears.
To do this right you really need all 9speed components to start with, derailleurs, chain, cranks, and shifters.
derrickito
Posted: Tue Jan 24, 2006 3:10 pm
now with 50 percent more EVILJoined: 22 Jul 2005Posts: 10566
that is the answer i was looking for.
ive got everything else 9 speed, ill keep shopping for the 9 speed sti's and just go with the original plan
:)
the dreaded ben
Posted: Tue Jan 24, 2006 3:38 pm
Grumpy GreebJoined: 20 Aug 2005Posts: 5329Location: flavor country
for future reference all cog spacing (therefore shifter spacing) 5speed thru 8 is the same, but all that changed with 9 and 10 speeds.
to accomodate more gears while maintaining dish of the driveside shimano had to make the spacing between cogs smaller.. ie skinnier chains.
Stuff just keeps getting thinner and thinner as they pack in more gears back there. 9 and 10 speed stuff doesn't seem to wear as well as 6, 7 and 8 speed. SunTour wore the best. Not only are cogs getting thinner, the teeth are shorter too. This makes cogs wear out quick. You can see the mushrooming of the teeth on just about any modern cassette that has any use.
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now with 50 percent more EVIL
Joined: 22 Jul 2005
Posts: 10566
Joined: 24 Jul 2005
Posts: 6037
Location: Ether
Grumpy Greeb
Joined: 20 Aug 2005
Posts: 5329
Location: flavor country
