This is a one-of-kind bike that’s got some older tech, for a reason…
This is a full sized, XL, 29’er mountain bike that will fit into a regular sized suitcase without an oversize charge thanks to S&S couplers (https://www.sandsmachine.com).
Some of the things that allow the bike to do this are based on the fact that it’s got some older standards on the frame, for example, 135mm spaced rear triangle. A wider rear triangle (like BOOST), would make the frame too big. Long travel on the fork would also impair its ability to fit. 
This bike, in my opinion, can do it all.
Mountain biking—sure it’s a hardtail, but if you’ve got the skills, you can ride a hardtail on just about anything.
And, if you’re up for the challenge, it’s got an eccentric BB, so you can run it single speed.
Throw the rigid fork on there, and you’ve got a gravel bike, or even a flat-bar cyclocross bike.
Throw slicks on there, and you’ve got a road bike.
And… you can pack it up and take it with you.
This was my second bike with S&S couplers, and despite my hopes and dreams, I just don’t get to travel like I want to.
The last trip I took with this was to AZ in 2021, and it’s just been hanging in my basement, sad and lonely.
Here’s the spec:
Singular Swift CrMo Frame
Bike Size XL
Head Angle 72°
Seat Tube Angle 72°
Seat Tube Length (center of BB to top of seat tube) 550mm
Seat Tube Length (center of BB to center of seat tube) 495mm
BB Height 310mm
BB Drop 60mm
Top Tube, center of seat tube to center of head tube, measured 610mm
Head Tube Height 140mm
Chainstay Length 450mm
Wheelbase 1119mm
Fork: Fox F29
Handlebar: Niner Flat bar, 31.8 (700mm wide)
Stem: Thomson Elite X4
Headset: Chris King
Grips: ODI lock on w/ flange
Brakes: Shimano Deore XT (4-piston)
Shifter: SRAM X9 (10spd)
Seat: WTB
Seatpost: Thomson Elite X4
Cranks: TruVativ Stylo with e13 chainring
Chain: SRAM PC1091 hollow pin with PowerLock
Rear Cassette: SRAM 10spd with e*thirteen (e13) EX Cog Extender
Rear derailleur: SRAM X9 (10spd)
Hubs: Hope Pro II with standard QR
Rims: Mavic XM719
Tires: WTB Ranger 29x2.25 (I have tubes, because dealing with tubeless sealant would be annoying when taking the bike apart and putting it together for travel)
EXTRAS:
CroMo rigid fork (with one superficial blemish).
Hard carry case with ALL travel needs for packing & protecting.
My travel tools & side bag.
two water bottle cages.
PLEASE NOTE: while the whole bike CAN fit in the case, it will be overweight (over 50lbs), so I would always put tools, and some of the parts (cranks, pedals, one disc, etc, in a small travel bag that would go in my other baggage.
Everything about this bike is in great shape: shifting, braking, tires are brand new, etc.
I will pack the bike up and ship it, but buyer pays actual shipping.