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Reviewed in the United Kingdom on July 7, 2024
John Sulsenti
Reviewed in the United States on July 10, 2024
These are for my X7 rear derailleur.
Texasflood
Reviewed in Canada on October 2, 2024
Exact fit.
Steve C
Reviewed in the United States on April 2, 2024
They worked well. Good fit and good value. Shipping time was as advertised
ctrlx
Reviewed in the United States on June 10, 2021
On my 2011 Trek Gary Fisher 29er x-cal this is an exact fit for the x.7 (which is clearly stamped with a manufacturing date of 2010). These gears have an inner and outer plastic ring connected by "spokes." My lower gear was cracked clear through; on the upper gear only the inner ring was cracked. But the bike was still rideable. To replace the parts, I shifted the bike into smallest chainwheel and largest rear cog. This allows access through the rear wheel to the allen bolts. Remove both bolts, keeping top and bottom separated (though I'm not sure if lengths are different). Clean the cage before putting the new gears on. Put the lower gear on first with the printed side facing out, so it rotates clockwise while pedaling. The teeth on that gear are chamfered for smooth engagement. Upper gear teeth are symmetrical, but there is still a "sidedness" to the part, as you can see the spokes are angled and the inner aspect has 3 notches on one face. I installed this gear with notched side facing in, as the lower gear has the notched side facing out.With new parts the drive train rolls buttery smooth. Shifting is slightly more precise, but the biggest improvement is noise. Also, I don't have to worry about my cracked gears completely fragmenting and stranding me.Pease note, all the alloy aftermarket replacements appear to include two identical gears. The teeth are not chamfered on the lower gear, which may be why they are noisier.
Cliente
Reviewed in Spain on March 25, 2021
Preferi comprar las originales para mi cambio Sram X9 antes que otras marcas por si acaso me daba algun problema de incompatibilidad.El material de los dientes de las roldanas es muy resistente pero los rodamientos conviene mantenerlos de vez en cuando desmontandolos,limpiandolos y poniendole grasa nueva.
Ärppel
Reviewed in Germany on July 3, 2018
Passt wunderbar
Hotmann
Reviewed in the United States on February 12, 2018
Exact match to the original sprockets on my X.7 derailleur (purchased in 2011). My lower jockey wheel cracked and the chain would occasionally come off causing issues backpedaling and additional friction. Replaced in a few minutes and back to perfect working order. Bearings are nicely greased from the factory.
Danilo Belardinelli
Reviewed in Italy on November 28, 2018
...anche se a mio avviso leggermente costose. In ogni caso, ho sostituito le vecchie pulegge SRAM che avevo sul mio X0 del 2015. Totalmente compatibili come si legge nella descrizione. C'è una puleggia che va in basso (leggere la dicitura nella puleggia stessa per identificare quale è) e con le scritte verso di voi, mentre l'altra che va in alto come la montate la montate bene in quando non ha il verso.Se avete delle pulegge "stanche" nel vostro SRAM, con queste ritroverete precisione nella cambiata e silenziosità. Le pulegge di alluminio saranno anche belle ma... fanno troppo rumore! Ne ho provate tante ma poi sono tornato sempre alle pulegge in plastica.
Larry
Reviewed in the United States on April 21, 2016
Nice replacement, I could feel my drive train was just a bit off. After examining my old pulley wheels I decided to see if replacing the would help, and it did. These new pulleys have shown minimal wear in several hundred miles of mountain riding.
John B. Mckibbon
Reviewed in the United States on May 20, 2015
I did a lot of searching for jockey wheels before I decided to buy these stock replacements for my X9 derailleur. Honestly, there are not a lot of options available. Outside of the SRAM factory replacements there are several aluminium options, some with sealed bearings and some without. Based on all my research the aluminum wheels don't hold up any longer than the plastic factory wheels and they can actually be louder/noisier while riding. When it comes to pricing some of the aluminum wheels are actually slightly cheaper than the plastic ones but I didn't want to take a chance that I wouldn't be happy with the wheels just to save a couple bucks. I have now had my new wheels installed with 50+ miles on them with no complaints. Do your self a favor and drop the $20 or so dollars on this replacement set and get back on the trail.Also, jockey wheels are a wear item so expect to change them out every so often if you ride a lot just like you would your chain. Overtime the springs in derailleurs also wear out and the shifts will not be as crisp and the gears will be harder to index. Since a generation 2 version of the X9 is only $90 and these wheels are around $20 I plan on replacing the rear derailleur every three sets of wheels.
B.A.
Reviewed in the United States on January 12, 2014
My original equipment x9 derailleur pulleys had become ninja throwing stars from wear so I slapped a set of the same back on. They only last about a season for me, but I ride 3x a week or so in nasty conditions. There were a bunch of aluminum options with fancy bearings I considered but I tend to wear our a derailleur over a couple of seasons from hard use so I treat pulleys as a wear item. Plus, the nylon design is quieter than metal pulleys so you may as well save a few bucks and put the money aside for buying an X0 to replace your worn x7/x9 when it's toast. Or just another of the same if budget is tighter-all derailleurs develop slop over time. A fresh X9 is better than a toasted X0 at the end of its life any day of the week. A good derailleur makes a big difference. Almost two decades of riding has taught me what parts are worth the money!
Denny Crane, Esq.
Reviewed in the United States on July 7, 2012
These pulleys are original equipment on late model SRAM X.9 (and other) derailleurs. Mine is the 2011 model, with one center hole (as illustrated). They were fairly easy to replace, but be aware that the two bolts that serve as axles are different lengths, and not interchangeable. As I recall, the longer one is the top one. I have not tried any of the aluminum jockey wheels, nor the ceramic bearing versions, so I cannot offer a comparison. But, I can say that these seem to work fine. However, I should add that one of my original ones cracked during the first year of use, approximately 3,000 miles. For reference, I ride a recumbent bike, with a 10' long chain, and I shift abruptly on occasion.
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