Enduro Bearings has added their own take on ceramic bearing pulley upgrades for the SRAM Eagle group. They start with an alloy center for stiffness, then coat it with a Delrin outer so it’s quiet and doesn’t wear the chain. It’s not just the construction that sets them apart, it’s the third wheel that’s available:

Enduro Bearings ceramic bearing pulley upgrade for SRAM Eagle and SRAM DUB bottom bracket

Because cable friction sucks, right? Why not go ahead and upgrade the idler wheel, too? Granted this one’s not moving much compared to the pulleys, but they added one more benefit: There are no holes to collect mud.

Enduro Bearings ceramic bearing pulley upgrade for SRAM Eagle and SRAM DUB bottom bracket

The set of pulley wheels will retail for $229 and come in the stock 12/14 tooth configuration SRAM uses. Throw in the idler to make it a complete kit at $290. Late May early June for both.

Enduro Bearings SRAM DUB bottom bracket ceramic bearing upgrade

They’ve also developed a new line of stainless steel bearing equipped bottom brackets for the SRAM DUB crankset. All of the BB options will be on offer, and ceramic options will follow soon enough. They’ll use a 29mm ID built into the chassis, so no sleeves or adapters to fit the 28.99 spindle from SRAM.



  1. Aluminum spindle can expand at different rate to steel Internal surface of the bearing.
    Correct me if i’m wrong but Sram purposely use 28.99mm diameter instead of older design 30mm so that there are space for plastic hat between standard size bearing and the spindle to make things snug and quiet no matter what, just like Shimano’s design that use 25mm internal diameter bearing +plastic hat +24mm spindle.

    Coincedencely?, Enduro also make 24mm internal bearing to remove the plastic hat for Shimano crank to negate their design decision too. That is a bit more understandable because all 24mm axles are steel so different thermal expansion and tolerance is not really a problem. But why do this and make it a marketing material?

      • not so hot, just few Celsius above room temperature if the bearing does not seize.

        But at which temperature are they match in size?
        Do they make it fit correctly at 30 Celsius and become too lose at 0 Celsius?
        Does cold rain make them shrink and creak more compare to good summer day?

        • Not disagreeing with you about how a plastic top hat spacer offers advantages, but I think you will find that the tolerances vary in most of these parts to a similar or greater degree than thermal expansion will create. In other words, the temp is not the main or only source of poor fits on these things.

          Also, in my experience, most creaking comes from the outer race/frame interface, not the inner race/spindle interface.

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