SRAM X01 DH 7-speed downhill mountain bike drivetrain components

SRAM has just dropped the next iteration of their single chainring groups with X01 DH.

In a nutshell, it borrows all the design and technology of their XX1 and standard 11-speed X01 groups, but narrows it down to a 7-speed design for downhill mountain biking. That group is comprised of a 7-speed cassette that mounts to the XD Driver Body freehub, and 7-speed specific rear derailleur and shifter.

The X-Horizon derailleur has proven quite adept at keeping the chain in the chosen cog and, coupled with the clutch, keeping it on the front chainring, too. And their carbon X0 DH crankset has been making the World Cup circuit DH races for some time. The XX1 chain carries over unchanged for the gravity set. Now it all comes together for a DH compilation and another trademark: SRAM 1X™.

Drop in for the development story video, pics and more…

Two more videos on specific components of the group at the bottom of this post, along with complete spec/compatibility charts.

SRAM X01 DH 7-speed downhill mountain bike drivetrain components

The X-Dome Mini-Block cassette gets the durable JET black coating of the X01 11-speed part, but builds in an upper chain barrier to keep it from dropping off the inside. With a 10-tooth cog, it lets you run smaller chainrings for better ground clearance. Tooth counts are 10 – 12 – 14 – 16 – 18 – 21 – 24.

SRAM X01 DH 7-speed downhill mountain bike drivetrain components

It mounts to the regular XD driver.


The X0 DH crankset is a simple upgrade to the 1x chainrings, something that’s been built into the design of the cranks and rings for quite a while. Just unbolt the spider from a 2x crankset and bolt on the single chainring spider. There’s little reason why you couldn’t also bolt on an XX1 chainring (or third party one) to save weight. BB30 and GXP options available, also with gray graphics.

SRAM X01 DH 7-speed downhill mountain bike drivetrain components

Seven speed shifters provide the right cable pull and clicks for the shorter range.


X-Sync chainrings come in 30, 32, 34, 36 and 38 tooth counts. The new info on these says they’re compatible with 10-speed drivetrains, too, using their PC-1099 chain…which suggests they can be used to convert any 2×10 bike into a 1x with just a simple chainring swap. Which is a nice introduction for their 10-speed X01 DH bits:


There’s now an X-Horizon 10-speed rear derailleur and DH-oriented cassette. Sure, they’re touting the DH applications, but anyone can now upgrade their 10-speed drivetrain to a proper 1x system with all the chain retention benefits. Couple this with one of the bumper crop of oversized large cog replacements and you’d got a budget upgrade with few downsides. Retail is $277.

The derailleurs will come in two cage lengths to accommodate various setups, including one designed for extraordinarily long chain stay growth during suspension compression. The standard cassette has a max 12-36 range (among others), and the DH version shown above has three options: 11-23 / 11-25 / 11-26.

SRAM X01 10-speed upgrade options

The 10-speed X-Horizon rear mech will work with both the 10-speed shifter options: Grip Shift twisters and standard Triggers.


SRAM-X01-DH-7-speed-component-group-spec-list SRAM-X01-10-speed-component-group-spec-list




  1. There’s no word on max cog for the 10s version. That could kill the possibility of running it with “standard” mtb gearing (it was included in a rollout for DH-specific parts, where a 26 or 28 max cog would be totally appropriate).
    I wouldn’t be surprised if this is how they bring 1x to the lower tier groups without needing a stupid-expensive x-dome cassette; sure, forsaking the 10t cog, I for one am fine with that.

  2. i – There’s mention in the news about a new 12-36 10-speed cassette, and they say this is designed to work with regular 10-speed drivetrains, not just DH ones. So, our hunch is it’ll work with at least a 36t cog, and possibly more with a little unauthorized B-screw fiddling. Of course, any non standard parts usage will likely destroy your warranty, but Zach’s been having pretty good success with the oversized cogs he’s been testing.

  3. Well, it’s evident then that the Hydro Rim Brake recall didn’t affect them one bit, what with the plenty of resources they had to keep these projects on track.

    Maybe I can throw these non-recalled products on the 2014 Specialized S-Works Tarmac SL4 gathering dust in my garage since late November, waiting for replacement parts.

    In related news: FOR SALE: Brand-new 2014 Specialized S-Works Tarmac SL4 with SRAM components.

    SRAM: Eat a d1ck.

  4. I have had a decent experience with all of SRAMs components excluding the brakes. The brakes however have been so bad for so many years, that any bike I buy, I required a switch out to XTR before I strike a deal. I will never deal with SRAM brakes again, ever.

  5. I ride sram PG730 (7sp) Outstanding reability in extreme -25C winter and smooth shifting on hardcore bumpy iced snow terrain.
    Will never go to 8s+

  6. @Dopestrong: this is the only way to get a 10 tooth cog which is a nice feature. Also, the XD driver body is a better design than the old standard.

    I was laughing pretty hard reading the comments on a certain popular DH website (hint: colored bicycle). The readers there have been begging for a 7-speed DH drivetrain for years, and as soon as they get it, most of them are bitching and moaning about the price, new standards, etc. Very predictable and hilarious. Very impressed by SRAM’s innovative engineering these days. Love my XX1 and will love Hydro Red 22 road again after the new design is finished (was awesome while I had it before the recall!).

  7. @Patrik – oh, you are right, when toyota issues a recall on a rav 4, I am sure that they stop all R&D everywhere in the company to get that suspension issue back on track.

    Top notch reasoning really, since that recall was in the brake division and this innovation happens in a drivetrain division of the company, so SRAM definitely should have ripped a chainring engineer from his desk to help fix a hydraulic brake issue. That is super solid and air tight reason. They should have thought of that. Heck, get those pesky rear derailleur engineers in there too. Why not. Idiot.

    Recalls suck, I dont like them either, but I’m am pretty sure being a d1ck isn’t helping.

    To me this innovation looks pretty cool. It works for Stevie Smith, it doesn’t cost a ton in comparison to other top of the line gruppos, and it delivers on what DH riders have been asking for for 20 years.

    Man, some people can gripe about anything.

  8. Will this work this road shifters? I can’t recall if the exact-actuation is compatible with anything but sram trigger shifters. If not, I hope they come out with a CX version soon.

  9. @Nate – Yes.. SRAM 10 speed road and 10 speed MTB shifters use the same cable pull. There is no barrel adjuster on the X01DH derailleur though, so you’d need to use an inline one.

  10. @SomeFawkingguy
    Aside from the name on the product, X01 DH has nothing to do with your hydro brakes. Crossing your arms, stamping your feet, and pouting has clearly gotten you nowhere. Maybe a different approach, like taking Sram up on their offer to replace/reimburse you for the recalled product will help? Seems to me you’d rather whine than ride.

  11. I give SRAM credit for keeping the ideas flowing… might not be a fit for many but at least they’re giving new ideas to the market = more concepts for the community

  12. While I understand what the author is saying: I wouldn’t consider a $277 deraileur a cheap upgrade. Especially with how good the sub-$100 deraileurs I’ve been running the last 10 years have treated me. Hell, kickass the zee I’m running right now cost me about $60, and I won’t break down in tears if I destroy it on something.

    I might have thrown down for an XD driver and a 10sp cassette if they had decided to make that, and not throw it in a CNC for 4 hours so I can actually afford it. Even a 10-36 cassette means I can drop a chainring size.

  13. So much hate on the internets for all things Sram. I just don’t get it. Are some of their brakes crap. Yep. That doesn’t mean everything they produce is tainted. I having been running XX1 since it came out and have not had a single issue. The BS about the chain and cassette lasting four times longer is actually kosher. I have put tons of miles on my original cassette and am just now on my second chain, but the first was hardly worn. I just upgraded from a Fox 34 to a Pike. I didn’t think the change would be all that noticeable but it is. The Pike is simply the best fork I have ever ridden. I clearly have the money to spend on this stuff and I don’t mind maintaining my gear, so what’s the problem? I often think the only people who gripe about Sram are people who can’t afford it or people who don’t maintain their gear and are then shocked when it doesn’t work. It’s high tech stuff, it needs maintenance. At least they are breaking new ground, ahem Shimano…

  14. Well, why base the 7-speed cassette on the 11-speed group? 🙁
    I guess it’s the only way to keep everybody willing to buy it on Sram gears as well, instead of only selling XD-driver bodies and 7-speed cassettes to everybody that wants to keep his Saint gears. 😀

  15. To everyone screaming about the XD driver bodies, if you find a way to put a 10 tooth cog on a standard shimano 10speed hub, I’ll give you $5. It can’t be done, that is why they switched to xd driver.

  16. Collin –

    TNT and New Ultimate both made a 10 tooth cog that replaced the Shimano cassette lockring with a cog.

    Get back to me for the address for my $5.



  18. I am going to buy the XO1 DH for 10 speed if it can run on my 11-36 cassette. I already have XX shifter, so this will be sweet if it works right.

  19. “Collin –
    TNT and New Ultimate both made a 10 tooth cog that replaced the Shimano cassette lockring with a cog.
    Get back to me for the address for my $5.”

    That just happened.

  20. I can’t believe the people whining about sram’s brake recall. For one, you can still ride the bike and take your chances. No indications it’s a problem in warmer weather. Second, Sram will send out replacement shifters and mech brakes until the hydros come back. Plus they give the shop $100 to change it over (which isn’t enough for the shop if that’s supposed to cover the change over back to the hydros again. The kits I’ve seen include fancy compressionless housing too.

    7 speed is a good idea. I’d devolve to regular 7 speed if I could get my hands on quality parts for cx riding. My tandem has a super cheap shimano 14-34 7 speed cassette, and it shifts phenomenally under load.

  21. Less is more.. I’m for it. Also, don’t forget about the difference in the parraleleagram (I was going to correct the spelling of that but figured I would leave it so some spelling correctors could twitch a little). Sram right now seems to be taking an awesome approach, give you the necessities and yet make them as best they can.

What do you think?