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Boundary Graval Bike

Boundary Ultegra Di2 RX

Size Guide
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Go Beyōnd

A rugged and dependable gravel bike ready to kick up some dust as you redefine what’s rideable. The Boundary has the geometry of a road bike with the heart and handling of a trail bike so you can rumble confidently across all kinds of mixed terrain. 

According to the Federal Highway Administration, there are 1.4 million miles of unpaved roads in the U.S. just waiting to be explored—and we haven’t even looked up the international mileage. So take the roads less traveled, or the ones that don’t even show up on the map. Are you ready to push your boundaries?

This Bike Is For You If...

You're looking for an epic carbon-fiber gravel bike that won't break the bank. You'll be able to run 700c or 650b tires with plenty of clearance, install up to three water bottle mounts and racks in the front and rear. 

You're ready to take your riding to the next level and race in any gravel event. In 2019, the Boundary made its fast debut by placing 3rd at the Dirty Kanza 100. 

*Max packed out weight — 300 lbs.


Carbon Fiber


19.4lbs / 8.8kg*
*Weight including 700c wheels on size medium bike.




Shimano Ultegra Di2 RX

Headset Cane Creek 40 Series
Easton EA70 31.8
Easton EA70AX
Easton EA50 Zero Setback
Saddle WTB Volt Medium Cromoly
Shifters Ultegra Di2 R8070
Rotors Shimano XT MT800 160mm
Front Derailleur Ultegra Di2 R8050
Rear Derailleur Ultegra RD-RX805
Crankset FSA Gossamer Pro 386EVO 48/32
Cassette Ultegra HG800 11-34
Chain Shimano HG701
Bottom Bracket FSA
Tires Panaracer Gravel King SK 700x43c Tubeless or Panaracer Gravel King SK 650X48c Tubeless
Wheelset Select Wheels Above
Brakeset Ultegra Hydraulic Disc
Boundary Carbon, Multiple Rack/Fender/Cargo Mounts

*Components subject to change without notice to comparable specifications.

Bar, Stem + Crank Specs

Size XS, S Bar: 40cm; Stem: 90mm; Crank: 170
Size M Bar: 42cm; Stem: 100mm; Crank: 172.5
Size L, XL Bar: 44cm; Stem: 110mm; 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
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

Size Chart & Geometry

Size Guide

Bike Geometry

Size XS S M L XL
Top Tube Length (mm) 520 535 550 565 580
Head Tube Length (mm) 120 140 150 170 190
Seat Tube Angle 74.5˚ 74.0˚ 73.0˚ 73.0˚ 73.0˚
Head Tube Angle 70.5˚
BB Drop (mm) 67 67 67 67 67
Chainstay Length (mm) 435 435 435 435 435
Wheelbase (mm) 1020 1021 1026 1037 1052
Front Center (mm) 594 595 600 611 626
Standover Height (cm) 75.9 78.6 80.3 82.3 84.3
Fork Axle to Crown (mm) 395 395 395 395 395
Fork Rake (mm) 50 50 50 50 50
Seat Tube Length (mm) 490 520 540 560 580
Reach (mm) 371 375 376 385 394
Stack (mm) 537 557 568 590 609

Shipping & FAQ

Click it. Ship it. Rip it. 

Obed bikes ship pre-assembled factory direct to your doorstep with a super simple setup process. Need assembly help? Setup a video call with one of our tech's or visit our YouTube channel for bike setup and maintenance tutorials.

Exact delivery times can vary so feel free to reach out to our support team and ask for an ETA on shipping to your address. We'll be happy to help! 

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. 

Test Obed on your favorite routes. 

Put it 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. 

International Shipping. 

We ship internationally but you will be responsible for any import fees, VAT, and duties. Contact our support team if you'd like to receive a custom quote on landed costs to locations outside of the United States. 

How My Bikes Arrives


Factory Installed scuff guards

Up Close and Personal

There's an Obed for You

It doesn’t matter if you’ve been riding for years or a few months — we all crave that feeling of freedom that grows stronger with every turn of the pedal crank.

Keep chasing that feeling on one of our rugged and refined steeds specially designed for gravel, road, or mountain adventures.

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