Moots Routt 45 Frameset Info

The Moots Routt 45 Frameset comes from a shop that has been welding titanium in Steamboat Springs, Colorado since 1981. County Road 45 runs through Routt County — the road this frame is named for and one Moots' builders ride regularly. That's not backstory added for marketing texture; it's the context for why the Routt 45 exists: a gravel bike designed around what the terrain in that part of Colorado actually demands. Rocky, rutted, long, and unpredictable. The Routt 45 is built to handle all of it.

The geometry here is endurance-leaning rather than race-sharp. A longer top tube paired with a shorter stem puts the rider in a more upright position than a race-geometry gravel frame — confidence-inspiring on rough ground rather than aggressive. The head angle runs from 70.25 degrees in the smaller sizes to 71.5 in the 60cm, giving the bike a relaxed, stable front end when things get loose. Chainstay length holds at 437mm across all seven sizes (50 through 60cm), consistent handling character regardless of which frame you're on. The geometry is suited to covering real distance on real terrain.

The frame is built from Moots' 3/2.5 seamless titanium tubeset — thin-walled, US-made tubes in multiple diameters and wall thicknesses, tuned for ride quality at each individual frame size. The bottom bracket shell is 68mm English threaded, a standard that services easily and holds up without the creak issues that plague press-fit alternatives. Flat-mount disc brake mounts are 3D-printed in titanium, engineered for precise alignment between caliper, rotor, and axle. The rear end uses 142x12mm thru-axle spacing.

What the Frameset Includes

The Routt 45 ships as a complete frameset package: a Moots carbon gravel fork, a Chris King Inset 7 headset, a Chris King TF30 BSA 68mm bottom bracket, and titanium spacers. The Chris King components aren't filler — they're what most riders building at this level would specify regardless. Getting them standard means the frame arrives ready to build without sourcing a headset and bottom bracket separately, and both pieces service cleanly over years of use.

Tire Clearance and Mounting

Max tire clearance is 50c — wide enough for most gravel and mixed-surface applications, from fast-rolling file tread to more aggressive knobs for wet or loose conditions. Three bottle cage mounts give hydration range on long routes, a detail that matters on the remote back roads this frame is designed for. Fender eyelets at the lower legs and monostay chainstay bridge allow for all-season riding. The 27.2mm seatpost diameter is a traditional titanium spec that allows for a degree of vertical compliance not available through larger-diameter posts. Derailleur clamp is 34.9mm, compatible with 1x and 2x drivetrain configurations.

Finish Options

The Routt 45 is available in several finish configurations, reflected in the price range at RA Cycles. The base finish is Moots' natural brushed titanium — the look the brand is known for. Anodized/Etched and Premium finishes add color and visual treatment at additional cost. In 2026, Moots is offering a 45th Anniversary edition to mark over four decades of building in Steamboat Springs. Each option lets the rider shape the frame's aesthetic at the time of order, and all carry Moots' limited lifetime warranty.

Available in sizes 50 through 60cm, the Routt 45 frameset is the right foundation for a rider who wants to build something intentional — a titanium gravel platform that will outlast several component generations and still handle the same way a decade from now. This is what a considered gravel build starts with.

Moots Routt 45 Frameset - Specifications

Frame Material:

3/2.5 Seamless Titanium

Fork:

Carbon

Headset:

Chris King

Seatpost:

27.2mm Required

Bottom Bracket:

Chris King BSA 68mm

*Specifications are subject to change.

Moots Routt 45 Frameset Geometry

Size:

50

52

54

55

56

58

60

B. Seat Tube (c-t)

460

480

510

520

530

550

570

C. Top Tube Length

520

530

545

555

570

585

605

D. Head Tube Length

120

140

150

160

170

190

210

E. Chain Stay Length

437

F. BB Drop

71

69

68

G. Seat Tube Angle

75

74.25

74

73.5

73.25

73

72.75

H. Head Tube Angle

70.25

70.5

71

71.5

I. Stand Over Height

762

787.4

802.6

810.3

823

838.2

858.5

J. Wheel Size

700c

K. Stack

560

579

587

596

608

627

647

L. Reach

367

364

374

376

385

392

403

The RA Perspective

The Routt 45 is our go-to recommendation for the rider who comes in saying they want a gravel bike that can do everything. It's a frameset, which means they're building it the way they want — and it rewards that approach. The frame is genuinely versatile: 50c clearance, three bottle mounts, fender eyelets, 1x or 2x compatible. There's no reasonable gravel configuration this frame can't support.

What we notice first is the geometry. Moots made the Routt 45 more upright than a race-focused gravel frame, and the 437mm chainstay gives it real stability on rougher terrain. It's not slow-feeling — titanium doesn't ride slow — but it's settled. On a long day with a lot of climbing and variable surfaces, that composure is more valuable than a more aggressive position that wears you down in the final hour.

The Chris King components in the frameset package aren't filler. The Inset 7 headset and TF30 bottom bracket are exactly what we'd install on a build like this regardless. They service easily, they last, and the English threaded BB shell means you're not fighting creaks two seasons in. Getting them factory-included simplifies the build and justifies part of the price gap over a bare frameset from a lesser brand.

One thing worth telling customers: the natural brushed titanium finish looks better in person than in any photo. Moots' work has a quality that reads as premium without being flashy. For riders who care about how a bike looks over the long term, titanium holds up in a way painted steel or carbon never will. This frame will still look right ten years from now.