2x10Technology is now available in SRAMs X7 line. 2x10 gets rid ofThe largest chainring and, in place, adds another cogToThe cassette making itTen gears.This enablesThe riderTo have more efficient gearing and,Therefore, a more efficient ride.This also means less weight, faster and smoother shifts, and better clearance. Weight: 137g approx (2X10, Low Clamp) Cage Material: Steel Clamp Material: Forged AL-6061-T6 Chainstay Angle: 66-69 degrees Max/MinTooth capacity 15Tooth
This came on my Yeti Sb - 95 and has been such a headache. It does not shift properly and should not be put on a bike like this. I have worked on it for hours and taken to my local bike shop, but can not get it to shift gears properly. Like the other guy said it seems to shift when it feels like it...I have now given up on this almost brand new derailleur and looking for a replacement. Do not buy.
Weaknesses: But it rubs in too many gears and is too hard to shift up
This came with the bike, and I've had several goes at trying to sort it out. I've reached the same conclusion as other reviewers, it's just far too fiddly to set up well and it rubs in too many of the gears. My other bike, with a deore mech and the same amount of gears, doesn't have any rub on any of the three cogs and it's certainly not set up to unreachably minute perfection, like SRAM components seem to need (my x9 rear mech is also v fussy). Also, why make it so difficult to shift up the chainrings? I recently dislocated my thumb and could still change up with my deore mech but not the x7.To be fair, it does actually work and I think any bike with more than 21 gears is fiddly to set up well. But the x7 just doesn't seem well-engineered, and it makes 27 speed drivetrains seem self-defeating if you can't use all the gears on them without scraping the oil off your chain. If shimano can do it then sram should, if they want to live up to the hype, be able to do it better - or charge less for their stuff.
Big thanks to mtbr - fantastic site, lots of really great input from users
Strengths: Difficult to tune the first time out (first time tuning one). Once tuned, it works very well, shifts quickly and easily with little noise. I'm using a GXP bottom bracket and it's fine. No chainline issues.
Weaknesses: I have about 100 miles on it so far, no problems other then the occasional adjustment, but I think I have it perfect.
This derailleur works perfectly for me, shifts very quickly even into the big ring. I've only had it on for about 2 weeks so far, but haven't had any issues. Highly recommended.
a Weekend Warrior
from Rainier, OR
Date Reviewed: January 29, 2009
Strengths: Works good with a 48.5mm chainline
Weaknesses: Doesn't work with a 51mm chainline...which is a SRAM crankset (Truvativ FireX GXP)
With the stock Truvativ Powerspline crankset and a 48.5mm chainline this derailleur works just fine. However, when I installed a Truvativ FireX GXP with a 51mm chainline...it did not work correctly. I am a former bike wrench with 8 years of experience so I have lots of tuning tricks for front derailleurs. But nothing worked on this, setting the correct cable tension in the middle ring resulted in excessive cable slack in the granny ring. The solution was replacing it with a Deore front derailleur which work perfect with the 51mm chainline.
When I have a SRAM front derailleur and a SRAM crankset...I expect them to play nice together.
Bike Setup: Windsor Cliff 29er Pro with lots of mods
a Cross Country Rider
from Mt. Juliet TN
Date Reviewed: December 9, 2008
Weaknesses: Broke in half mid commute 2nd time I shifted from middle chain ring to outer chain ring. The rubber shim is too soft and gives to much flex, and the clamp is made of low grade cast aluminum.
Bike Setup: Leader Frame, Truvativ crank set, Mavic cross ride wheel sets, x-7 shifters and deraileurs.
from Ohio, USA
Date Reviewed: September 18, 2008
Strengths: Nice beefy design. Strong and reliable when shifting. Does a better job compared to Shimano's LX and XT.
Weaknesses: None that i can think of.
As an experienced XC and Downhill racer, I tried this product for the sake of curiosity and to my amaze this thing is better than my pdrevious Shimano LX and XT. I dont know why other comments here give it bad chillies.
Bike Setup: Santa Cruz Nomad, Rock Shox, SRAM Comps, Panaracer tires, some Race Face and FSA, DT Swiss Wheelset.
Date Reviewed: June 5, 2007
Weaknesses: Weak cage, poor pinch bolt position,
Not long after fitting this, the cage becane very loose resulting in poor shifting. If you can afford this, you may as well buy the shimano equivilent. I replaced this with thte hone f/mech and havn't looked back. Its stronger, and far easier to adjust as i found i had to remove my back tyre to adjust the x7 as a reult of the position of the pinch bolt
Bike Setup: GT Avalanche, RS Revelation forks, juicy 7s
a Weekend Warrior
from Birmingham, UK
Date Reviewed: December 26, 2006
Strengths: Price, looks
Weaknesses: even the low mount top swing model doesnt have enough clearance to fit alot of FS frames, namley, my giant trance
not what i was hoiping for when i orderd it, the mech is hooked up to an x7 shifter, shifting a standard 22/32/44 set of race face deus rings - shifting IS good, but the action is heavier then with the deore mech preveously used, overall shifting doesnt feel as refined.
also dissappointed due to the mech originally being orderd for my giant trance, but finding out it wouldnt fit, i had to order an xt top swing instead.
to be honest the x7 front mech performs no better then the budget x-gen front mech, its just a little lighter.
Bike Setup: mech is fitted to a kinesis maxlight xc hardtail
a Cross Country Rider
from Canyon Lake, TX
Date Reviewed: November 7, 2006
Strengths: It's not Shimano. First SRAM try at a low-clamp design..
Weaknesses: Cage rubs in higher gears on small chainring, lower gears in big chainring.
It works better than the XT I had on there. I swapped the XT out on the first notice that SRAM started delivery of their low-clamp design starting with the X7 (my bike is finally de-Shimanoed). It's better than the XT, but that's not saying much. Marin full suspension designs require a forgiving front derailleur setup. I was just anticipating the SRAM line of low-clamp design, but was slightly disappointed with the loose, but too small cage design... Still better than XT though, even though X7 is more of an Alivio equivalent. Maybe the XO low-clamp design will be better.
a Cross Country Rider
from Sydney, NSW, Australia
Date Reviewed: January 10, 2006
Strengths: Good, strong construction, good spring, works with top and bottom pull
Weaknesses: I cant get it to adjust perfectly... its always wanting to rub on the chain in top gear... when i go 2 tighten the cable, it wont go down into second... possible design flaw or mabye just me. The main clasp that goes around the frame has to be tightened rediculously tight so the whole thing doesnt twist and move..
better than deore but mabye worth waiting till sram sorts out the range problem
a Cross Country Rider
from San Juan Philippines
Date Reviewed: May 16, 2005
Strengths: beefy links, strong spring
Weaknesses: design flaw causes rubbing in too many gears - not enough clearance or range?
This is for the x-gen front derailleur.
Seemed like a strong product with beefier links than shimano and a strong spring.
However, the chain rubs the inner cage in too many gears. On the middle chainring, I can't use the 2 lowest gears (largest rear cogs). AT THE SAME TIME, while on the large chainring, I can't use the 3 highest gears (smallest rear cogs). ( I'm using x7 triggers btw). I look stupid trying to pedal a too low gear while on fast flats, and then I burn myself out with a too tall gear when trying to blast up a hill. I never had these problems even with my old Shimano.
I have tried everything, even filing the inner sides of the cage. Several bike wrenches have given up trying various setups and FD positions.
Beign a fairly new product, I don't know if this is a design flaw. But i've heard some people in the SRAM forum here complain about the same thing. Some have gotten it to work but with a lot of work. But why bother when you can get a different brand which you can set up once and will work properly.
My advice, Wait for SRAM to rectify this problem before you buy.