0

Your Cart is Empty

February 13, 2019 2 min read

With Sram's introduction of their new Red Etap AXS group, they also announced their new XDR freehub body.  XDR isn't actually new though: the first place we remember seeing it was on Sram's 900 series of hubs, which came out back in 2016.  When asked about the new driver body, which a the time had no apparent use, we were told that it would allow for the development of a 12 speed road drivetrain at some point, and now that has arrived!

Chris King's teaser of their new XDR driveshell for their R45 and R45D hubs.  Photo courtesy of Chris King

So what's the actual difference between an XD and an XDR driver?  The latter has splines that are 1.85mm longer, making the driver body that carries the cassette effectively longer (the same as an 11-speed road Shimano-style driver, but more on that in a moment).  If you want to run an 11 or 12 speed mountain cassette, you just need a 1.85mm spacer behind it on the XDR driver, and you're good to go.  It's worth emphasizing, however, that while the freehub is very similar, it is longer, so it needs a hubshell that's designed for it.  This is one reason that it Chris King is offering it only on their road hubs, which are built for a longer 11-speed road Shimano style freehub body to begin with.  Since White Industries makes all of their hubshells slightly narrower to fit an 11-speed road freehub, the XDR freehub will work on all of them. 

White Industries current crop of titanium driver bodies: Campagnolo, Shimano 8-11 speed, Shimano Micro Spline, Sram XDR.  Photo courtesy of White Industries

Because all hub brands have approached freehub and hub design in general in their own way, it's hard to make any blanket statements about compatibility across multiple brands, but here's what we can say about the brands we carry:

  • Chris King R45, R45D Gen. 2, and R45D Centerlock hubs will be compatible with Chris King's new XDR driveshell, and conversion kits, as well as complete hubs should be shipping around the middle of March, 2019.  Currently there is no word on possible compatibility with other Chris King hubs.
  • White Industries has an XDR driver that is compatible with all of their recent hubs.
  • Onyx Racing Products is working on an XDR driver, and while we expect that it will definitely compatible with their road hubs, we don't have any word on compatibility with mountain hubs.  We'll keep you updated as new developments arrive on that front.
  • Phil Wood currently doesn't have plans to make an XDR driver.

Beyond this basic run-down, we're sure there will be questions, and we'll be here to answer them! 



Also in AVT Blog

Phil Wood production delay update
Phil Wood production delay update

September 22, 2020 2 min read

Phil Wood, like so many other manufacturers, is experiencing significant production delays....
Read More
Oregon Fires / COVID Service Update From AVT
Oregon Fires / COVID Service Update From AVT

September 14, 2020 3 min read

With everything that's going on in the world right now related to Coronavirus we wanted to update you all on how this is impacting us at AVT and our ability to continue to serve our customers.
Read More
Wheel Build of the Week: SES 7.8 / R45D
Wheel Build of the Week: SES 7.8 / R45D

September 07, 2020 1 min read

When you want to go fast, Enve's super-deep SES 7.8 are at the top of a very exclusive selection of rims, and this week's Wheel Build of the Week is just about the best configuration we can think of using these gorgeous hoops.
Read More

SIGN UP & SAVE