Lower gearing crankset question

Hi all,

I'm debating getting a Santa Cruz Stigmata which comes with an Easton 40t chainring and Sram Rival 10x42 cassette and interested in my options going lower gearing than this. 

I've read the XT 11-46 and Sunrace 11-46 cassettes can work with the Rival 1 der., but what about crank options?

The Stigmata has a 68mm threaded BB, and I'm quite confused figuring out what cranks are compatible and which aren't based on BB and chainline.

Chainring sizes I'd want to use based on the gear calc would be 34 ot 36t if I stayed with the 10-42. 

Appreciate any input, cheers.

 those are decent cranks and I think 110 BCD so you have tons of chainring options from wolftooth components. 

If if it comes with the 10-42 then i would stick with the xd driver I have found that it makes a big difference. I constantly spun out on the 11.  

I now use and really like the e*thirteen 9-46 cassette. It’s the best setup I’ve used so far for 1x with really low gears. I run a 36 up front but for 90% of my rides I think I could do a 38 I never really use the granny unless I’m mtb trails or crazy Vermont pitches. I bet the rival derailleur will work with it. It works great with my x1 derailleur.  

Some people have complained of wear issues but I have found it to be acceptable. I believe the newer versions have made updates to the design to combat early wear. I will definitely be buying another when the time comes. 

Just a thought. An 11-46 has 418% of range, and the 10-42 has 420% range, so they're basically the same. Instead of changing the cassette, I would play with the chainring instead. 
You'll be able to find tons of 1x cranksets for a 68mm BB. Even if a crank only comes in a double, there are aftermarket options for chainrings that have the correct offset for a 1x. 
For example, the spider on the Rival 1 and Force 1 crankset is removable, so you can either use 110BCD rings, or even direct mount MTB rings... 

I'm not that familiar with the Easton crankset that comes on the bike. If I see correctly it uses direct mount rings and the smallest chainring they offer is a 38T. Not sure which direct mount standard it uses and what other options are available. 

Oh and one more thing I didn't even know about until a few days ago... Sunrace has an 11spd 10-46 XD cassette.

I'll second HollyBoni's point about the 11-46 being a little too similar to your 10-42 to bother with getting a new freehub body and cassette. It sounds like a different chainring is what you want.

Easton's and Race Face's direct mounts (and cranks) are the same. Basically everything 38 tooth and higher is 'Easton' and everything 36 tooth and smaller is 'Race Face.' If you want a 34 or 36, look for a Race Face 'Cinch' direct mount. You want the non-boost version. Here's an example of a pretty trusty one - https://absoluteblack.cc/raceface-oval.html.

Here's another popular one - https://www.wolftoothcomponents.com/collections/mountain/products/direct-mount-chainrings-for-race-face-cinch.

Thanks for the replies! 

So with the stock EA90 Easton crank, would I be able to run a direct mount raceface chainring? 

Would something like Wolf Tooth's CAMO system work on that crank to make it easier to swap chainrings in the future?

hawk123 wrote:So with the stock EA90 Easton crank, would I be able to run a direct mount raceface chainring? 

Would something like Wolf Tooth's CAMO system work on that crank to make it easier to swap chainrings in the future?

Yes and yes.

I've the Stigmata but swapped in an Easton EC90 crankset. I put in a Wolf Tooth 34T chainring. It's the Race Face Cinch model with the Boost offset. This according to the Wolf Tooth support person has the same 3mm offset as the Easton chainrings.

Oh and per the other thread, I'm using the e*thirteen XCX cassette 9-34 which gives me a good amount of range for flats and climbs.