There are no 9sp clutch mechs.

You’ll probably find a mashup works best with SRAM as Shimano changed their cable pull quite noticeably when they went 10sp.

Cablepull expectation aside, a 10sp clutch mech has no idea how many gears it is allowed to run so long as the chain isn’t too big for the cage and pulleys. The shifter is the important bit as it measures the cable and gives you the click stops.

Using a 10sp shifter to run 9sp transmission is going to give you a permanent risk of overshifting off the cassette if you forget and click too many times. You can probably work around this with the limit screws and learn not to force the lever (as it will break!)

There were Frankenstein combos of SRAM 9sp shifter with Shimano 10sp clutch mech talked about on forums back when 2×10 was new, but I think you need to make a little spacer for the mech end of the cable to equalise pulls, and it’s probably only ever going to get as close to ‘right’ as the effort you put in to the mod. If you’re a person that obsesses about clean shifting, you should probably give up and get a 10sp shifter, cassette and mechs. Keeping the 9sp crank is fine if the rings are good.

Sorry, but it won’t work. Different pull ratios.

The 9 speed shifter will pull a certain amount of cable that was designed to move a 9 speed rear mech a certain distance sideways.

The 10 speed rear mech was designed to move a different distance.I ts only a small difference but as you move from the smallest to the largest sprocket on the cassette the incremental difference will show up as poor shifting.

There is a bodge of a device that alters the cable pull ratio to make it work, but at the moment the name escapes me.

thats true in a sense vincienup

but the leverage ratio on the mech itself changed between 9 and 10 speed..

7,8,9 mechs are all the same leverage ratio on the mech itself.. so they’re interchangeable

the 10 speed mountain bike mech is a different ratio.. so wont work..

ie.. 1mm of cable pulled moves the mech across sideways X mm with 7/8/9
the same 1mm of cable pull will move the mech a different amount on a 10 speed mech.

Just found the bodge doo-dah.

JTEK Shiftmate 6[/url]

Available from HERE[/url]

I think there was another bodge where you drilled a small hole in the cable pull arm of the mech.. and passed the cable through it then clamped it up at the opposite side..?
(but it only really worked with the plate type deore / slx / zee mechs though i think..) ?

EDIT: found it..!

http://bb.nsmb.com/showthread.php?t=153122