sram groupset compatability
#1
Senior Member
Thread Starter
Join Date: Jul 2015
Posts: 123
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
sram groupset compatability
is there any huge reason I couldn't use a long cage sram force 1 rear derailleur with a 34x46 crankset? Has anyone tried to do such a thing? or use any mountain bike derailleur with sram force levers? I'm trying to build a low range of 34x36 or 34x40 if possible.
#2
Senior Member
Join Date: Apr 2008
Location: St. Pete, Florida
Posts: 1,258
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
The "X-Horizon" design (straight parallelogram) used in SRAM's 1x RDs is not designed to work well with a double crankset. Road ("Exact-Actuation") compatible 2x MTB RDs would include X7, X9, X0, and GX 2x10 (NOT 2x11 -- that's only compatible with MTB 11-speed shifters).
#3
Senior Member
Join Date: Jun 2016
Posts: 174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The SRAM road 1x rear mechs aren't designed for use with 2x cranks. If you're using 10-speed shifters you can mix/match road and mtb mechs and shifters.
#5
Senior Member
Thread Starter
Join Date: Jul 2015
Posts: 123
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The "X-Horizon" design (straight parallelogram) used in SRAM's 1x RDs is not designed to work well with a double crankset. Road ("Exact-Actuation") compatible 2x MTB RDs would include X7, X9, X0, and GX 2x10 (NOT 2x11 -- that's only compatible with MTB 11-speed shifters).
#6
Senior Member
Join Date: Jun 2016
Posts: 174
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#7
Senior Member
Thread Starter
Join Date: Jul 2015
Posts: 123
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#8
Senior Member
Join Date: Apr 2008
Location: St. Pete, Florida
Posts: 1,258
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
The 2x RDs (especially the clutched "type 2" versions) actually work quite well with a 1x setup. There is a slight chance of ghost shifting when things get really bumpy -- that's what the X-Horizon is intended to address -- but for most that's not a big problem. I've used an X7-2.1 in a 1x setup for a couple years and it has worked very well.
#9
Senior Member
Join Date: Apr 2008
Location: St. Pete, Florida
Posts: 1,258
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
All the options I mentioned will work fine with the 2x11 setup you described. Number of speeds is determined by the shifters, not the RD. The RD just has to be able to move the correct distance with each shifter "click" (that's what the "Exact-Actuation" refers to).
#10
Senior Member
Thread Starter
Join Date: Jul 2015
Posts: 123
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
so i could use a sram mountain bike derailleur you listed and it would be fine? If so, I totally misunderstood your comment lol.
#11
Senior Member
Join Date: Apr 2008
Location: St. Pete, Florida
Posts: 1,258
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Correct. Any 2x SRAM RD (road or MTB) labeled "Exact-Actuation" will work with 2x11-speed SRAM road shifters & 2x crankset (even if it was originally for only 9 or 10 speed). Any RD labeled "X-Actuation" (all 11-speed MTB RDs) will not.
Thread
Thread Starter
Forum
Replies
Last Post
tylsteve
Bicycle Mechanics
1
01-15-11 03:35 PM
Drakonchik
Bicycle Mechanics
7
02-13-10 09:14 PM