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About FibreLyte - honest company. I asked abut chainrings to use in MTB. They said no problem, but mentioned they would not last long, depending on conditions. I am still considering getting a small ring from them since it is used less.
Anyway, aluminum pulleys were loud and the color wears off quickly.
AFC pulleys are best from what I have tried yet. Save 10-15g from original pulleys. Did not have good shifting with Di2, but that is a different story. Here original is best.
Overall original pulleys are the best.
MSC Koncept Carbon Di2 - 6955g
Leichtkraft Team Carbon - 6868g.
11g a pair for £20 (ebay) with ceramic bearings.
They look to be the same as the Mt Zoom ones but cheaper and available in colours other than red.
As Njee has said, they far outlast SRAM/ Shimano alternatives both on terms of remaining smooth and also in terms of wear on the teeth (as tested in horrible gritty, muddy British Winters).
They make no noise so there really is no downside. Also they still look good after 2700km so no reason not to IMO.
People also tend to argue that an alu jockey wheel will wear the chain quicker... take a look at what the chainring is made from
I also like that the large gaps between the "spokes" of the Aerozine/ Mt Zoom design seems to clear mud/ muck/ grass far better than a standard jockey wheel. Overall, light, cheap, long lasting and perform great. Nothing not to like
Current XTR 20g a pair
Not much weight saved but the function and durability, especially performance in the wet and mud (not to mention cheaper cost!) is much better for Aerozine/ Mt Zoom compared to stock XTR
"You can not compare our pulleys by spinning them in your hands. Our pulleys will not spin in your fingers, because our pulleys are simply to light to spin in the fingers. If you have a pulley that spins well in your fingers, that means you have a heavy pulley with a lot of mass that will move the pulley around. Pretty much the same as a crank set to test our bottom bracket. So you get the wow effect on a bottom bracket because you have a heavy load with a crank set to show the performance. This is not the case on our pulley, so the wow effect is missing. It is the same if you would use our bearings in a skateboard wheel. It simply has not enough load to spin for ever, but as you can see in the friction fact sheet, once installed you get the lowest friction possible."
having said that, I run various lightweight alloy pulleys, such as AEST and aeorzine but refrain from taking my best bikes when I know the ground is gonna be muddy.
I've replaced the upper wheels on my 26ers with BBB Rollerboys which have been brilliant from both a rolling resistance and durability perspective. Noticeable improvement in friction.
Sent from my android thingy using Crapatalk
The Aerozine pulleys I have been using can be maintained by lifting the seal and have been fantastic in harsh British conditions
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