Praxis wide range 10 speed cassette

Praxis has thrown down a serious contender to anyone looking to convert their 10-speed mountain bike to a 1x setup with their new Wide Range Cassette, and it’s not even limited to 1x drivetrains.

By creating a complete cassette, Praxis avoids any odd jumps in tooth counts between cogs and can build the entire piece into a more solid, cohesive unit rather than a cobbled together assortment of adapters. The tooth counts are 11-13-15-17-19-21-24-28-34-40, providing a usable range comparable to the new Shimano XTR and most conversions currently on the market.

Praxis’ Adam Haverstock says “a current 10-speed derailleur can hit 40 teeth with no problems and no adapters, so we stuck with that since it’s meet the needs of a majority of riders. That doesn’t mean they’re not looking at a 42 option in the future, but we wanted to start with a solution that works for most people.”

Praxis wide range 10 speed cassette

Cogs 11 through 28 are built into two clusters of stamped steel, and the upper two (34 and 40) are on a third cluster and are made of 7075-T6 with an un-dyed hard anodization process.

They’re also looking at doing a cold forged upper piece with the two largest cogs. After all, that’s the process they use for their chainrings. But that requires tooling, which takes time, and they wanted to get these out for the summer riding season.

Praxis wide range 10 speed cassette

They’re compatible with SRAM and Shimano parts, long or mid cage rear derailleurs only. Haverstock says it’ll work just fine with a 2×10 system, too, increasing the range further.

Claimed weight is 320g, price is $129.99 and they’re planned for launch on June 1.


The Turn Girder MTB cranksets, which just launched in December, get a new 94 BCD to fit as little as a 28 tooth chainring.


They’re also adding a Boost crankset that gets an offset spider to push the chainline out a couple millimeters to 52mm…for now. Rumor has it the official recommendations from engineers behind the Boost bikes are still finalizing a final chainline standard for Boost 148 rear ends standard. For now, that number’s sitting at 52mm.


The Girder 2D is a new little brother to the 3D hollow forged M30, which will be less expensive and comparable to an X7/Deore crankset. The spider options will be the same as the M30, including 1x, 2x and Boost. The Zayante road cranks also gain a 2D forged version. Look for those to add about 50 grams over the 3D hollow forged models, but that number could change once final tooling is done. The goal was to provide a more cost effective solution for their OEM customers, but they’ll be available aftermarket also.

Praxis narrow-wide cyclocross chainrings for 1x drivetrains

The Zayante road crankset is gaining a 40 and 42 tooth narrow wide single ring, and those rings will also be sold aftermarket for anyone wanting to turn their road or cyclocross bike into a CX1-like drivetrain. Chainring is $80, and they’ll mount to any 110BCD crankset.


  1. Praxis Works, you jerks! Don’t you know I could buy half of a XX1…uh…X01…err…X1 cassette for that kind of money!

  2. @eric huh?

    lets do math with your doll hairs if you want an 11-40…

    XT cassette m771 = $80 ( $40 online argh)
    ONEUP conversrion= $85

    lower shifting performance, more labor, similar cost
    also this is a first run, look, praxis just barely launched their turn cranks and theyre allready coming out with less expensive options.

    why the gripe?

  3. I don’t understand the sense to have a 11-40t cogs. With 28 or 30t chainring 11 is too short and with 32 or 34t chainring 40 is too long. For me the best solution is 1×10 with 9-40 cassette and 28t chainring

  4. “By creating a complete cassette, Praxis avoids any odd jumps in tooth counts between cogs…”

    Unfortunately, no they didn’t. The 28-34 is huge. In fact, the smallest 7 cogs are identical to Shimano XTR 11-40, they just squeezed the last 4 cogs into 3. Even changing only the 28T to 29T would be better than what they did.

    Why can’t anyone take the Shimano 11-34 9 speed cassette spacing and add a 40T to it? It’s obvious, it’s well spaced, and it should have been what 10 speed MTB introduced in the first place. Many years later countless companies finally catch on yet none can get the spacing right.

    Al least we know what to expect from Absolute Black…

  5. Praxis has seriously made a mistake by not making this 42t since quite simply Shimano is making an XT version in 11-42. And it will be lower cost.

  6. Interesting. I tried the OneUp 40t + 16t ($85 sounds about right) as a test to see if a 1x drivetrain would work for me, but the jumps around that 16t felt odd and I wound up going back to 2x with the stock Shimano 11-36t. At $130 for the whole cassette, this looks to be worth a look.

  7. @Jose: I’ve seen the Shimano XTR 11-40t for ~$250 from the usual suspects, but haven’t seen an XT 11-42t anywhere for any amount of money. Got a link?

  8. Seriously, why bother and have the extra cost, the extra effort and possibly compromised shift quality when you instead can have a 2 ring crank and a simple front derailleur? Why the hysteria about a single chainring system???

  9. Frippolini–

    BECAUSE ONE-BY!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    Actually, I agree. Their stuff is rather nice, though. We use their bb30/pf30 conversion bb for Shimano cranks, works well, easy install, little to no creaking if you use enough anti-seize. Much better than the plastic reducer/bb30 bearing setup. The new crank is stiff and kinda industrialy looking and not super expensive.

  10. I like it- good step forward. 130$ is a bit more than I would like to pay. At 100$ I would be good to go – but this is very much what I have been waiting for. Strong consideration.

    Until gearboxes take over the world the 1x is fine for me. Grind it up – and hammer it down.

  11. @ Droptop: Nope, the 110 BCD Praxis chainrings won’t work on Campy cranks. On Campy cranks, the chainring bolt behind the crank arm is offset and doesn’t lie on the bolt circle.

  12. $120 sounds pretty awesome to me. They aren’t a huge company(compared to Shimano and SRAM) and this is their first cassette. They will not be selling 10,000 of these anytime soon so the price should be expected and maybe even expected to be higher. I also have doubts that they’re ever going to be making tons of different cassettes. That all keeps their expected profits smaller.

  13. I have the oneup 42t on my 29er with 32t chainring and love it!
    On my fatbike I have the wolftooth 40t on a 9 spd cassette that with some extra things from the hardware store got to work well. I am very interested in this whole cassette option though.
    @frippolinni the point of 1x systems imo is for tire clearance and getting rid of rings I don’t use anyway, also I believe front mechs are the work of satan! Lulz

  14. I think $129 is a good price since this isn’t going to be mass produced on the same level as Shimano and SRAM stuff. And comparing to SRAM 11-speed setups, it’s an absolute bargain. I mean just the XD driver is something like 70 bucks. Add to that the cassette, shifter, derailleur…

    Currently on a 1×10 setup (32×11-36) that is ALMOST enough for me except on very steep climbs, so this will be pretty much perfect for my needs, and wallet too. Seriously considering buying it when it comes out.

  15. 40 to 42 is only 5% or 1/3 of a gear. Every little bit helps but good shifting is more important than a barely noticeable increase in range. The 11 to 10T change is more valuable.

    The big mistake isn’t the lack of 42T. That’s a fair choice. The big mistake is making an entire cassette but not making the gears evenly spaced.

  16. “They’re also looking at doing a cold forged upper piece with the two largest cogs. After all, that’s the process they use for their chainrings. But that requires tooling, which takes time, and they wanted to get these out for the summer riding season.”

    Makes me think I should wait for them to get their cold forged cogs on this cassette.

  17. “Rumor has it the official recommendations from engineers behind the Boost bikes are still finalizing a final chainline standard for Boost 148 rear ends standard. For now, that number’s sitting at 52mm.”

    I mean, SERIOUSLY?

  18. Aloha. Awesome, great to see this kind of development. I personally would like to see a 9-40 spread. And yes, it is pricey but still cheaper than trying to put a 11 speed set up together, especially if you’ve already got $$ vested in 10 spd stuff.

  19. @gmats: “If you’ve already got $$ vested in 10 spd stuff.” You realize a 9t cog isn’t going to be compatible with any existing 10 speed hub, right?

  20. Sorry guys, I am not a “hater” and definitely not somebody that is against new development. However, this doesn’t look like development to me. Just today I had a race ruined by being stupid enough to not use “standard shimano” pedals.
    The big three make good products that have a great reliability and performance as opposed to all sorts of smaller companies. And not even that, they are usually affordable as well.
    Get shimano 11 speed, and you only need to change rear derailleur and shifter. For those who really want 1 by…standard Sram stuff works great for those that don’t mind the bigger gaps between the gears.

  21. @John

    Yes, I realize that. I’m just looking toward the future because when I built my stuff up, the 11 speed stuff was way too expensive. Therefore, because the XD driver stuff was too expensive and did not give me the range I wanted I ended up with Canfield Brothers. It’s a great idea and easily gives the range with a 40 on the other side. And……’re not totally right on “compatible hub”. Leonardo is already making a 9 tooth, wide range, 10 speed cassette that will fit on XD driver hub. 11 tooth cog is not going to give the wide range needed by some of us.

  22. Glad someone is doing this and reasonable price (vs alternative cassette+42T) but as others have said, they missed the boat doing an entire cassette (yeah) without proper spacing (nay). A simple 29T instead of 28 would even things better. I understand the 40T decision, but 11-42T is what I use (sram 1070 + e13 42T + spare 16T I had).


    vs shimano 9 speed

    If shimano is coming with XT 10sp 11-42T as @jed mentioned (seem doubtful) that would be great, and good fight back to sram 11psd $$$$. I don’t get shimano 11 spd 11-40 at all…

  23. didn’t IRD just introduce a 10sp cassette as 11-13-15-17-19-21-25-29-34-40T and 11-13-15-17-19-21-25-30-36-42T? Not light at 470gr nor cheap exactly at $220, but reasonable.

  24. Like its XTR sibling, DEORE XT M8000 offers 1×11, 2×11, and 3×11 crank options to satisfy any type of rider ability level or terrain. New 2×11 and 3×11 M8000 drivetrains, expand range while maintaining even better rhythm when paired with an 11-40T cassette for taken from ( ) ” An exciting addition for DEORE XT M8000 is a 1×11 specific 11-42T cassette that expands Shimano’s 1×11 gear range slightly over the race inspired 11-40T of XTR.”

    HG-X11 specific tooth profile
    Aluminum spider
    Aluminum (40T/42T) and steel cogs
    Rhythm Step progression

  25. I’ve been using the OneUp 11-40 with long cage XT and 34 Race Face NW. It’s been great so far. I just mounted a Praxis 11-40. It knocked off about 100 grams. So far the shifts are quick and crisp. A few good trail ride will tell me if these ratios and steps are keepers. If not I go back to my old setup which I love and this goes on my spare bike. It seems to be made quite well but time will tell.

  26. I’ve been using the the Praxis 11-40 for a about 300 miles now. I have it on a Giant Carbon XTC with a 1×10 set up. I have about 300 miles on it now, it shifts EVERY gear up and down flawlessly. I ride it hard and fast XC style so it has to hit every gear every time, and it does! I have the oneup system and the shift points just blow, period!

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