Enduro BB86/92 to BB386 EVO bottom bracket - just in

XD-15 bottom bracket for PressFit 30 shells

Owners of frames built around Shimano's press-fit bottom bracket cups have previously been limited to conventional 24mm-diameter cranks. But that's no longer the case with Enduro's new conversion bottom bracket. Thanks to some clever bearing design, you really can fit a square peg in a round hole now.

A 30mm-diameter spindle will actually fit inside a PF86/92 shell but conventional wisdom said there wasn't enough room left for the bearing cups – which is still true. Enduro has instead designed special cartridge bearings that integrate a flange directly into the outer race. The bearing and cup are now one in the same, gaining Enduro the precious few millimeters required for everything to fit.

Installation is a cinch: just press the Enduro bearings in where the standard cups once were, add the supplemental seals and spacers as required, tighten up the crank, and off you go.

Keep in mind that, while Enduro's new bottom bracket allows you to use a 30mm-diameter spindle in a PF86/92 bottom bracket shell, you are still restricted to cranks with longer spindles, such as models from FSA and Rotor.

Retail price is a reasonable US$80 and they're available now.

It's a tight fit but a 30mm-diameter spindle really can work in a bb86/92 frame:

It's a tight fit but a 30mm-diameter spindle really can work in a BB86/92 frame

Also arriving from Enduro is its new XD-15 bottom bracket for PressFit 30 shells. Previously only available in standard 24mm spindle diameters, the new version brings Enduro's remarkably durable XD-15 hybrid ceramic angular contact bearing design to the 30mm crowd.

Standard radial cartridge bearings are highly sensitive to axial preloading. However, Enduro's XD-15 design – which is in essence a cup-and-cone layout in cartridge form – is not only highly resistant to preload but actually requires a fair bit of it to function properly. More impressively, BikeRadar's own testing has proven it to be immensely durable and with remarkably low drag.

We've been commuting regularly on a conventional threaded XD-15 bottom bracket through an entire Colorado winter – with all of the seals removed– and it's not only held up great but literally still feels like new. Stay tuned for the full review soon.

Retail price on the XD-15 PressFit 30 bottom bracket is US$230/£152.

Enduro has now released a pressfit 30 version of its fantastic xd-15 angular contact bottom bracket:

The PressFit 30 version of the fantastic XD-15 angular contact bottom bracket

For more information see www.endurobearings.com.

James Huang

Technical Editor, US
James started as a roadie in 1990 with his high school team but switched to dirt in 1994 and has enjoyed both ever since. Anything that comes through his hands is bound to be taken apart, and those hands still sometimes smell like fork oil even though he retired from shop life in 2007. He prefers manual over automatic, fizzy over still, and the right way over the easy way.
  • Discipline: Mountain, road, cyclocross
  • Preferred Terrain: Up in the Colorado high-country where the singletrack is still single, the dirt is still brown, and the aspens are in full bloom. Also, those perfect stretches of pavement where the road snakes across the mountainside like an artist's paintbrush.
  • Beer of Choice: Mexican Coke
  • Location: Boulder, Colorado, USA

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