Stylrtop 2 pcs 11T Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulley for Shimano Sram Rear Derailleur Etc.

These come in a pair, unlike almost all of the other options on Amazon. They don't spin for very long, but that's to be expected as they're not meant to do so (a chain doesn't need to keep spinning, unlike a wheel, for example). They are very low friction for their purpose, however, and look great. They were larger than my old pulleys, but the tooth count is the same and they work great! The machining finish wasn't the best, but it doesn't bother me. The gold is wearing off already, after around 20 miles, but that's to be expected.

I bought an Orange bike and wanted to add color pop here and there, so I spent days looking for Blue grips, saddles, rails, bells, and on and on. When I first saw these, I didn't know where they belonged on a bike! lolAt the bike shop, I showed the picture to the tech to make sure they're the same size as what my bike needs. The guy said these should be even better, since mine came with plastic ones, while these are metal and should last longer.My bike had Shimano breaks; These will fit most Shimano derailleurs.If you're going to get them, might as well get the blue bike chain! Once installed, they're hardly noticeable, as they're small and practically hidden. I notice them because they're mine, but I doubt others will. The one benefit is that they're stronger than the plastic ones that came with the bike.

Product was delivered very quickly. I would have liked some direction about lubrication and installation, but that's not a deal breaker for me. Bottom line is that they spin much more freely than the stock pulleys on my 105, the drive train feels smoother and sounds quieter. Example... when I have my bike on a rack for service and I manually spin the crank, it keeps on spinning after I stop pushing them for a rotation or two. It didn't do that before adding the pulleys, a half rotation at most. I also replaced the chain at the same time, which I would highly recommend. I've since put a 100 miles on them and have no complaints or signs or premature wear.

One of these arrived with an apparent broken bearing.. It barely spins and actually will stop and start to rotate the other way as if there is something in the bearing, physically causing resistance. The other seems to be fine (though it barely spins with the caps on, this should not be the case with a brand new bearing.), so these bearings aren't the best. Considering I bought these for a prototyping project, and mostly wanted it for testing purposes, these will work. I will probably buy some higher end derailleur pulleys if I continue with what I'm working on. Or I will have to get them CNC'd myself maybe.

Good value and decent quality, but as other reviewers have noted, has a tendency to grab a KMC 9-spd chain. I'll keep it for use with another bike that has a 8-spd drivetrain or try a different chain at some point. Also, the overall width is just slightly narrower than that of standard pulleys.

Not too bad, and cant complain for the price and construction. However, even after applying bearing grease, one of the wheels was binding a tad even before installation. It is replacing a 7 year old SRAM X0 Ceramic wheels that was chipped and made of plastic.

So I ordered this and it didn't fit. The cognwas too wide for the shimano 10 speed 6700 chain. I was bummed.However, when the seller red my review, he promptly enquired via email and offered to ship me some other parts to try.The shipping took a few weeks but I received a few different options and a pair of them worked perfectly. It's an 11 tooth jockey Wheel with holes drilled around the circumference.

Bearing is loose and gritty even when using the best grease for bike bearing available, it doesn't last long... just 4 weeks it has stop rotating.

Haven’t taken on a long ride yet but worked fine when I tested riding in my neighborhood.

While these do provide a little bit of improved function, they look absolutely fantastic. They give your rear derailleur a little much-needed bling.

great

Nice upgrade

This pulley was well made but was too large to fit my Shimano long cage derailleur, the chain dragged on the flange in the cage.

Works great looks great a bit wider then OEM but is holding up.

After the first three rides the red polish fade out. They work properly but the paint does fade out.

Worked great and at a good price

After less than two months the bearings in both pulleys completely seized up.

good pieces but too small for my derailleur