Here's a frame I'm looking at:

https://www.aliexpress.com/item/32815484920.html?spm=a2g0o.cart.0.0.2dec3c00GUwApw&mp=1

It looks like an update to the raised chainstay frame that's been out for a while: a bit slacker, a bit longer, a bit taller head tube. All good for me.

I'm trying to get my head around what frames will fit 27.5+ plus tires. I don't have any interest in 29+... been there, too much inertia for my tight trails.

I would be happy with a frame that can fit a 2.8, so maybe some 29er frames will work?

Here's my list so far:

1) FM-M796+
https://www.aliexpress.com/item/T800-mtb-carbon-frame-27-5er-mountain-bicycle-27-5-inch-plus-thru-axle-frame-FM/32804199504.html?spm=a2g0s.8937460.0.0.pMQ2kT

Steep head angle, only two sizes, BB92, Boost or 142mm rear


2) CS-496 (the e-stay bike)
http://www.carbonspeedbikes.com/shop/mountain/cs-496-27-529-plus-frameset/

Modern head angle, but not enough stack for my taste, bottom bracket may be a bit low with B+ tires, BB92


3) CS-496 copy (another e-stay bike)
https://www.aliexpress.com/item/Toray-800-carbon-fiber-MTB-27-5er-frame-new-thru-axle-carbon-fiber-650B-plus-frame/32824016630.html

PF30, Boost, 27.5+, but more head tube length than the CS-496


4) FM-299
https://www.aliexpress.com/item/27-5er-650B-PLUS-Boost-Super-Light-Carbon-MTB-Frame-Bicycle-Frame-FM299-148-12MM-MAX/32839565262.html

This is the frame with the dropped right chainstay.
BB92, 71 HA, 21" size available but no geo listed.


5) FM-476
https://www.aliexpress.com/item/27-er-Boost-full-carbon-bicycle-frame-carbon-mtb-frame-27-5-plus-carbon-650b-mountain/32775531818.html

BB92, says QR or thru axle, but I'm guessing it's boost. This one actually looks pretty good, 21" size available, 69.5 head angle.


I'm sure there's more out there, what else have you seen?

I found another frame that's slightly different, looks like the CS496, but takes a 27.2 seat post and you can get it with BSA bottom bracket:
https://www.pinkbike.com/buysell/2189809/

Notice it's a bit different around the seat tube junction:


vs. the FR-701/CS496:

Yeah, I did a quick search for Boost wheelsets, and there is basically nothing out there. Makes a frame build kind of tough.

Sette Razzo SC, carbon fiber 29er frame, size 21" or XL. Includes seat collar and an FSA headset. This is a super smooth riding carbon frame, but not dead feeling at all. It has a really nice balance of stiffness and responsiveness. It can clear an honest 2.4" tire in the rear. The Razzo features full internal cable routing, tapered head tube, and a normal threaded bottom bracket. It's in good shape--what may look like scratches in the pictures is actually wrinkles or scuffs in the protective tape that the original owner applied.

SOLD

More pictures and geo are at: http://bikingtoplay.blogspot.com/2013/07/the-for-sale-post.html

I thought seriously about a Chinese Ti frame. You can get a custom frame shipped to your door for ~$1000. That's not much more than a Karate Monkey frameset goes for these days. I've been too chicken/cheap to pull the trigger, though.

Some great reading is here:
http://www.spanner.org.uk/

I looked at a few companies when I was thinking about a 29+ frame with sliding dropouts and maybe a 44mm headtube:

Walty seemed to run $700, custom options included, and $135 shipping to the US.

XACD started at $600, but options and shipping quickly ran than up to $1000+

Titanproducts was $850 for the frame and around $150 for shipping.

Hmm, maybe I need to pull this together into another blog post.

Hi CMH, I sent you a message via email.

Jakob21, are you Jago F? Because your email bounced back.

Thanks,

Eric