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Old 07-09-13, 06:21 PM   #1
phread59
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Need help with SRAM rear drailiuer, X7 or X9 10 speed.

I'm coming here for you guys collective wisdom. Here's the issue. I just bought a Specialized Rubaix Elite with SRAM Apex drivetrain. It has a compact double crankset (50/34) and a 11-32 cassette. I live in Central PA and montains are a fact of life. SRAM does not offer a triple crankset. And you cannot control one with the Apex brifter. I need more gears in the back,PERIOD.

I'm going to replace the rear deraliuer with either an X7 or X9 unit. I'll swap the cassette to 11/36 and replace the chain with a new longer one. I'll save the old bits for another project.

What I want to know is there any difference in the shift quality and durability of X7 and X9. We are talking 10 speed here. Is it wirth the coupla extra to go to the series 2 units. I'm leaning toward the X9 series2. Weight isn't really an issue. I'm not a weight weenie. Hell I weigh 190 and am pretty much a Clyde. So a few ounces don't mean diddly to me.

The bike is brand new. 2 weeks old, so calbes are not anissue. I'll be using the stock Apex brifters. Any help with which to purchase would be great.

Any suggestions on a cassette, I'm thinking a Shimano SLX or similar cassette. Any suggestions? Thanks for you're kind consideration.

Mark Shuman
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Old 07-09-13, 10:01 PM   #2
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I would definitely consider getting the x9 type 2 with a clutch for reducing chain slap
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Old 07-09-13, 10:12 PM   #3
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I am using a X9 type 2 on my cyclocross commuter with Force Brifters. It works very well. It shifts better then the Apex set up on my Roubaix.
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Old 07-09-13, 10:33 PM   #4
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You definitely need the long cage derailleur. For a road bike, I can't see type 2 mattering very much, but I suppose it can't hurt since the derailleur is maybe $100 - 120.

The PG-1070 cassette is fine.

You really only gain a tiny bit of gearing doing all this, however. Something like 12%. It's also interesting to note that if you had a 30/39/50 Shimano triple with a 12-28 cassette before (a common combination), 30x28 is 2.05 gear inches. Your current Apex setup of 34x32 is 2.03 gear inches. This is the real reason road triples have gone away.
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Old 07-09-13, 11:43 PM   #5
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Shift quality has WAY more to do with the shifters than the deraliuers.
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Old 07-10-13, 07:18 AM   #6
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Originally Posted by Canker View Post
Shift quality has WAY more to do with the shifters than the deraliuers.
That isn't true anymore b/c of SRAM red yaw FD and exogram cranks. Still true as far as RD is concerned.
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Old 07-12-13, 05:45 AM   #7
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For sure X9 is better than X7, about the Casset PG1070 will work fine.
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Old 07-13-13, 11:53 AM   #8
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JUst getting back to this thread again. Been busy the last few days. I have another road bike. A 2005 Fuji Professional carbon frameed bike. It's an amalgamation. I think the frame was bought to replace a trashed early 2000's Cannondale. The wheels(Gippiemme Grecal Parades, standard on a bunch of C'Dales) and brakes are Cannondale. As is a bunch of other parts.

It was set up as a race bike with race bike gears. I had an Ultergra cassette installed 11-28 to go with the Ultegra running gear. The bike has Dura Ace bar ends on it, not brifters. And put a Deore crankset and LX front deraiuer on. It has 48, 36 and 26 crank rings as I recall. This gives me just enough gearing to allow me to get up the hills I have around here with some difficulty. But definatly doable.

The 32/34 on the Rubaix isn't quite enough. I've hit 2 hills I couldn't get up. I've had to stop and rest half way up. I've got heart issues that limit my ability to really exert myself. I've got to spin up hills, not mash up them. If SRAM wouldn't be so stupid and offer tripple STI brifters. I'd have got another brifter and a triple crankset and been done with it. But a SRAM triple is out of the question.

So I've got to work with it or can the whole groupo and go with Shimano. That would be near the 1000$ mark. If I can get enough out of mountain rear gearing for a coupla hundred I'll stick with the SRAM.

Now you know the whole truth. I'm just torn between the cost of X7 and X9. is it worth the extra money for the X9? I'm riding road so I don't know SRAM mountain stuff at all. I'm familiar with Shimano. I'd like Deore quality. I don't think I need any more than that. The difference between 105 and Ultegra isn't that much. So I'm looking for guidance from people who use SRAM mountain.

Again thanks for the help.

Mark Shuman
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Old 07-13-13, 04:32 PM   #9
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Either will serve; the question is, do you want to be happy or VERY happy with the performance?

I ride MTB, and run SRAM almost exclusively (FD's are interchangeable, and Shimano cranks are good); I got almost 6 years of hard service out of an X.9 RD, and replaced it with an X.7 2 months ago. The difference is so slight, I almost can't tell.

Shifters DO make a lot more difference than derailleurs; it's why I don't agree with the "bling" idea of an X.0 RD and X.9 shifters on complete bikes at the LBS. I'd rather have an X.0 SHIFTER and X.9 RD....
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Old 07-13-13, 06:42 PM   #10
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x7 is plenty. the major feature of new x9 derailleurs I mentioned in my last post and it is irrelevant for a road bike.

I did not guess that you have a 26T granny ring on your other bike's road triple. But if you do this RD change and use a 12-36 cassette you would have nearly the same gearing, 26x28 = 1.95 gear inches and 34x36 = 1.99.
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Old 07-13-13, 10:01 PM   #11
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you could drop another tooth in the front also

http://www.homebrewedcomponents.com/...bolt-chainring

I used a PG1030 cassette for my commuter build which is a 11-36. I happened to use a 10 speed X9 because I got one for $40 used from a kid at my LBS. I have X7 on my MTB and it works good too.
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Old 07-14-13, 09:20 PM   #12
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Thanks guys for the input. I'm still vacilating. Not sure yet, I'm having second thoughts about X9. The first Fuji road bike had Ultegra in the rear until the trunnion carrier exploded. I put a 105 medium cage on it. Both shifted smooth and posative. I just took the mountain bike out today. It's got Deore on it. I just put a lower end HG cassette on it and a new PC870 chain on it. It works flawless. Smooth, quiet and accurate. It's all I could ask for.

If I could get the Rubaix Apex to shift like that I'd be a very happy camper indeed. It may be early 2000's 8 speed but it works just perfect. If you guys could apply that info and come up with a consensus. I'd appreciate it. And Slowrider Thanks for that link I saved it and may just do that too. The ratio's are so close to being OK it's driving me nuts.

Mark Shuman
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Old 08-02-13, 06:21 PM   #13
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I just want to update this thread before it totally expires. I want to thank you guys for you're insight. It was a big help.

I ended up with 1ST generation X-9, a PC1070 cassette in 11-36 with a PC1071 chain. I rode it yesterday for the first time. I think the 4 teeth in the back will be enough. I ran some hills yesterday I struggled with before. I went up just fine albeit slowly. But that's the trade off. I can certainly live with it. I felt a big difference even on the 34 sprocket. 1-1 was a big help. I felt even that difference.

All in all for 300$ it was worth it. The current set up shifts much better than the old. The hanger was out of plane slightly. The shop set that and did a great job setting the whole thing up perfect. Love the way it works. Smooth and precise just the way I like it.

It does kinda look silly. Heck it covers and hides the dork disc. It sure looks strange with that huge pie plate and spindly derailer back there. But who cares what it looks like, it WORKS!!!!!!

Thanks for the help again.

Mark Shuman
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Old 08-02-13, 08:22 PM   #14
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Congrats!
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