[johnism]

if I am setting up a 1*9 do I need a med or short cage Rear Derailleur ?

 

[timjr21]

I went with a medium...

and it works very well.

Tim

 

[grnamin]

I went with a medium as well and it works quite nicely. I guess you can say that I went down the middle road.

 

[RedRider93]

I had a short cage X9 and it was pretty awesome. I now have an X0 long cage, and it shifts better, but the chain line is thrown off quite a bit. So in short, buy a short cage if you can, middle if you can't get a short cage, and long cage if you get a really nice deal on it and it's a good derailleur

 

[cruiserman]

I use short. Works fine.

 

[DFYFZX]

I run a Short X0 with no issues...

 

[newking]

I use a SRAM twist shift, a XO medium RD, 32 tooth front ring, 11-34 rear cog & N-Gear Jump stop. No chain suck or chain dropping off issues. Shifts great.

 

[johnism]

ok any difference between x7 and x9 is x7 like rival or force for the road side

 

[Amnesia]

X7=Rival
X9=Force
X0=Red

Not literally obviously, but that is the breakdown in the line up of road vs. mountain.

 

[DFYFZX]

Maybe I should point out I run a 30t sprocket and 11-34 cog?

 

[JMac47]

Either will work

Maybe I should point out I run a 30t sprocket and 11-34 cog?

Med will reduce chain slap I would think. Biggest cog in the rear cassette governs it more then the front ring. Not sure how a short would work on a 34t.

Whoops ment for the OP.

 

[thasingletrackmastah]

I use an old Shimano 600 shortcage with a 11-34.
No problems.

 

[Mtb_Jay]

Short Cage

I run a short cage XO with a 11-34 rear and it works great. With a X9 trigger shifter it is super snappy, feels much quicker than the long cage X9 I had before switching to a 1x9.

 

[cruiserman]

About $28 at Pricepoint.