FOMTOR 11T Jockey Wheel Derailleur Pulley 2 PCS Aluminum Bicycle Rear Derailleur Pulley Guide Wheel for Shimano Sram Rear Derailleur Etc

For whatever reason I had issues with the lower jockey wheel on my shimano 105 10spd (long cage) setup. When ever I started to pedal hard the chain wouldn't catch on the next tooth and then would be deflected sideways and wedge into the jockey-cage. I tried reversing the wheel and switch top with bottom, but no change in behavior. Not sure if the teeth need to be deeper or fatter or what. I may try a 13T version in the future, but for now just put the original shimano jockey wheel back in the lower position and it's fine now, if mis-matched.The top jockey wheel seems fine. I did notice the stock shimano one has a little lateral play whereas the fomtor one is very rigid. Frankly, this seemed to give crisper shifting when indexed properly. I wonder if the oem part is that way to make it simpler to get "close-enough" for overworked mechanics or allow for a little break-in after the bike has left the shop.

The upper wheel has a bit of side-side play due to sloppy tolerances, so the chain will wedge into one side or the other. I can remove it and re-center it on the bearing but it eventually slides over again.

I really like these cogs! Will reorder once these have been worn out! Metal cogs, with bearings encased. Work well!

Sharp looking, but I am not certain how long the color is going to remain intact. Already seeing some wear and my bike is still on the trainer. Only 100 miles on the new set-up. Get what you pay for!!!

These shed dirt very well and can be cleaned wayyyyy easier than the stock plastic ones. Price is very reasonable and they look cool. Will buy again!

Terrible product. Too much flex in the bearings. Instead of shifting the gear flexes at the bearing making shifting really inefficient. Just buy from your bike shop.

No trajo los tornillos. Creo debía llegar todo completo

They work and look a lot better then my old ones, and smooth.