Stylrtop 2 pcs Bike 13T Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulleys for Shimano & Sram,etc.

Exact replacement for the plastic/nylon jockey wheels on my Trek 820. The old JWs had over 10,000 miles on them, so they were due for replacement. Although the old set were only a bushing and not a bearing, they did last a long time, but I figured a sealed bearing would operate more smoothly, and the price was right. The new wheels came with two different sized adapters depending on the size of the attachment screw. Swapping them out took only a few minutes, and they spin smooth and quiet. Very satisfied so far, would recommend.

A nice bit of bling for the bike. The pulleys spins very freely but I'm only awarding four starts because longevity is key to this part and I don't have enough miles for that fifth star. Shifting is very good but the pulley does introduce a bit of a whirring sound that may fade with the miles. It's not irritating. Two of these are necessary for a derailleur and the 2-pack that you purchase with this product makes a lot more sense than two separate purchases that other pulleys require.

Looks great, but noisy and color comes off in a few rides, then the side bushings wear through and gear rides against derailer cage. Put stock bsck on. Didn't last 2 months

Se desgasto muy rapido ya las tuve que cambiar

The size is a little bit (2-3 millimeters maybe) bigger than my original. I have Shimano Acera derailleur. So far working good. Tried on light trails. Looks really good, a small detail, but still a change.

Wont roll freely binds up

Really like them, really slick, I probably have a good 200 miles on them now with some heavy uphill climbs and these have worked flawlessly, even fixed a sight slippage in low gears I was having with the stock ones.

Item was as described. Nice looking. Seems to work. 2 size sleeves provided. The sleeve would not pass though the housing without a little muscle.