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Boundary Gravel Bike

Boundary MLT

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Boundary MLT: a different flavor of gravel!

For some, gravel riding gets a little more rugged. The climbs a bit more punchy. The descents, a bit steeper, the fire road a bit looser and more rugged. For those riders, we offer a twist on the ideal gravel platform: the Boundary MLT.

Comprised of the rugged carbon Boundary frameset that has become our mainstay gravel bike—one poised for everything from relaxed exploration to aggressive race day—we’ve added some great features that make the Boundary MLT even more capable when the gravel gets truly rough. From bigger, beefier 700x45mm or 650Bx53mm tires, to the introduction of a KS Lev SI dropper post providing 65mm of clearance while descending—operated from the Shimano STI left shifter—the riding gets even rowdier—and more confident.

We’ve also added a wider flared bar and paired it with a shorter stem to give you all the control you need, no matter how rugged the trail gets. Finished off with Shimano’s work horse GRX 810 1X gravel components.


This Bike Is For You If...

The trails are less groomed, the climbs punchier, the descents steeper. With bigger tires, traction on loose, wet, or sandy terrain is better than ever. And you get all the storage and handling versatility of our Boundary platform, making it a fantastic choice for the race or weekend backpacking excursion. Ready to go even further out of bounds? The Boundary MLT is for you!


Carbon Fiber


20.4lbs / 9.25kg*
*Weight including 700c wheels on size medium bike.



Learn more about the Boundary with the Owner's Guide

Read Boundary Stories


Shimano GRX 810 1x with Dropper/Integrated Dropper Lever

Headset Cane Creek 40 Series
FSA Gossamer 70mm
FSA AGX Alloy, 46mm
KS LEV Si 65mm dropper post
Saddle WTB Volt Medium Cromoly
Shifters Shimano GRX RX810 with dropper lever
Rotors Shimano MT800 160mm
Rear Derailleur Shimano GRX RX812
Crankset Shimano GRX RX810 1X 40T
Cassette Shimano XT M8000 11-42
Chain Shimano HG701
Bottom Bracket Praxis
Tires Maxxis Rambler Silkshield 45c Blackwall
Tubeless Sealant Stan’s No Tubes
Wheelset Select Wheels Above
Brakeset Shimano GRX RX810 Hydraulic
Boundary Carbon, Multiple Rack/Fender/Cargo Mounts

Bar, Stem + Crank Specs

Size S Bar: 46cm; Stem: 70mm; Crank: 170
Size M Bar: 46cm; Stem: 70mm; Crank: 172.5
Size L, XL Bar: 46cm; Stem: 70mm; Crank: 175

Frame Details

Frame Specs

Frame Material Carbon Fiber
Max Tire Size 700x45c or 650x53
Headset Upper
Headset Lower
Crown Race
Front Spacing 12x100mm
Front Axle Specs 12x1.5x120mm
Rear Spacing 12x142mm
Rear Axle Specs 12x1.5x172mm
Seatpost Diameter 27.2mm
Seat Collar Diameter 31.8mm
BB Standard BB86
Max Chainring Size 52/36t
Rotor Max Size (Front) 180mm
Rotor Max Size (Rear) 160mm
Front Derailleur Mount Braze-on
Derailleur Hanger Proprietary
Water Bottle Mounts Yes
Fender Mounts
Rack Mounts
Three-Pack Mounts Yes
Toptube Bag Mounts Yes
Downtube Accessory Mount Yes
Fork Offset 50mm
Rigid Fork Length 395mm

Carbon Fork

Our full-carbon adventure gravel fork is designed with performance and versatility in mind:

  • Three-pack mounts for water bottle or cargo cages.
  • Built-in fender mounts for wet weather comfort.
  • Fork Steer Tube Diameter: 1 1/8” to 1 1/2” tapered
  • Axle Spacing: 12 x 100mm
  • Compatible Rotor sizes: 140 and 160mm

Elevate your off-road experience with a fork that combines precision, comfort, adaptability, and style.

Size Chart & Geometry

Size Guide

Bike Geometry

Size S M L XL
Top Tube Length (mm) 535 550 565 580
Head Tube Length (mm) 140 150 170 190
Seat Tube Angle 74.0˚ 73.0˚ 73.0˚ 73.0˚
Head Tube Angle
BB Drop (mm) 67 67 67 67
Chainstay Length (mm) 435 435 435 435
Wheelbase (mm) 1021 1026 1037 1052
Front Center (mm) 595 600 611 626
Standover Height (cm) 78.6 80.3 82.3 84.3
Fork Axle to Crown (mm) 395 395 395 395
Fork Rake (mm) 50 50 50 50
Seat Tube Length (mm) 520 540 560 580
Reach (mm) 375 376 385 394
Stack (mm) 557 568 590 609

Shipping & FAQ

Shipping & Delivery Options

Obed bikes ship pre-assembled factory direct to your doorstep with a super simple setup process or delivered fully built by a technician. Learn more about our Domestic and International Shipping & Delivery Options.

Have more Shipping Questions? Check out our frequently asked shipping questions.

What should I do if I am between on two sizes?

If you can achieve your required seat height with both bikes sizes, then you can pick based on your riding preference or style. The smaller frame will be more nimble while the larger bike may feel higher and faster. LiveChat with us or email us for help finding the right size.

How do I mount accessories onto my Obed?

Our Baseline and Boundary models have various mounting points for a multitude of accessories available on the market. 

For nutrition and hydration, our water bottle and top tube storage mounts can be used with most 2-hole accessories designed for M5 x 0.8mm mounts spaced 65mm apart. The screws provided with the frame are 10mm long and should be replaced with longer screws should your accessory mounting bracket be more than 3mm thick.

At the rear of the bike, we have provided fender and light rack mounting points.  Unlike many metal bikes which may have open ended mounting points, our carbon fiber frames have closed end mounting points.  This requires special attention to the length of screw when mounting racks and fenders with various thickness attachments.  Should the accessory mounting point be more than 2mm thick, source screws that are 10-13mm longer than the thickness of the item you’re attaching. 

For fork mounted accessories, the same rules apply as mounting to our seatstays and dropouts.

We recommend a 20lb load weight limit. 

What is your Return Policy?

Put your new bike to the test with our 30 day return policy. If it's not for you, just box it up the way you received it and contact our support team for further instruction.


Factory Installed scuff guards

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