For relentless speed and pure, exhilarating fun.

The Thomahawk Frameset

Whether you’re taking on a rugged single track or endless fire roads, the Thomahawk is your ticket to unforgettable rides.

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The possibilities are limitless.

Nothing Wasted
Every tube has a job. Clean, purposeful, and ready when you are.
Your Fit, Your Way
Small changes make a big difference. Get it exactly where you want it with a Thomson cockpit.
Built by Hand
Every Thomahawk is handcrafted by Nate Zukas, one frame at a time. You can see it in every weld.
Steel is Real
We chose Columbus Zona for the way it rides. Lively when you push, smooth when the road gets rough.

Overview

More of What Matters.

This steel bike frameset is for riders who want it all – gravel roads, dirt roads, long-distance road riding, and even single track. Handmade in Georgia from premium Columbus Italian steel tubes, this frame delivers the perfect balance of speed, stability, and durability. Designed for 700C wheels with clearance for up to 2.25″ tires, the Thomahawk is ready to take you anywhere.

With an 85.5mm T47 bottom bracket shell and SRAM UDH, the Thomahawk is built for today's wireless 1x drivetrains: SRAM Transmission and eTap AXS XPLR, Shimano GRX Di2, and Campagnolo Super Record X. No cable ports means clean lines and nothing to rattle.

An ENVE Adventure fork adds to the Thomahawk's confident ride, giving you modern gravel tire clearance, adjustable rake, precise steering, and a smooth feel on rough terrain. The 445mm chainstays strike a balance between stability and responsiveness, making the bike a solid choice for both fast-paced rides and technical sections.

The Thomahawk fits up to a 48t aero chainring with room for 2.25" tires. Whether you're chasing marginal gains at Unbound or riding every weekend, it takes the setup you want.

SPECS

Frame Geometry

The right fit starts with the right frame size. Use the chart below to compare each size and find the one that matches your body and the way you ride.

Key	Measurement	XS	S	M	L	XL
A	Reach	368 mm	372 mm	380 mm	394 mm	392 mm
B	Top Tube	529 mm	535 mm	549 mm	570 mm	575 mm
C	Stack	554 mm	563 mm	582 mm	606 mm	630 mm
D	Wheelbase	1027 mm	1034 mm	1050 mm	1072 mm	1079 mm
E	Chainstay	435 mm	435 mm	435 mm	435 mm	435 mm
F	Front Center	605 mm	612 mm	627 mm	650 mm	657 mm
G	BB Drop	80 mm	80 mm	80 mm	80 mm	80 mm
H	Seat Tube Angle	74°	74°	74°	74°	74°
I	Head Tube Angle	70°	70°	70°	70°	70°
J	Seat Tube	475 mm	490 mm	490 mm	530 mm	530 mm
K	Head Tube	105 mm	115 mm	135 mm	160 mm	186 mm
L	Fork Rake	55.5 mm	55.5 mm	55.5 mm	55.5 mm	55.5 mm
M	Fork Axle-to-Crown	409 mm	409 mm	409 mm	409 mm	409 mm
N	Front Spacing	100 mm	100 mm	100 mm	100 mm	100 mm
O	Rear Spacing	142 mm	142 mm	142 mm	142 mm	142 mm
P	BB Shell Width	85.5 mm	85.5 mm	85.5 mm	85.5 mm	85.5 mm
	Rear Center	428 mm	428 mm	428 mm	428 mm	428 mm
	Trail (700x45)	69 mm	69 mm	69 mm	69 mm	69 mm
	Trail (29x2.25)	75 mm	75 mm	75 mm	75 mm	75 mm
	BB Height (700x45)	273 mm	273 mm	273 mm	273 mm	273 mm
	BB Height (29x2.25)	288 mm	288 mm	288 mm	288 mm	288 mm
	Seatpost Diameter	27.2 mm	27.2 mm	27.2 mm	27.2 mm	27.2 mm
	Max Tire Size	29x2.25"	29x2.25"	29x2.25"	29x2.25"	29x2.25"

All measurements in mm unless noted.

Angles in degrees. Fork: ENVE Adventure, 55.5 mm rake, 409 mm axle-to-crown.

Bottom bracket: T47-85.5. Both axles are 12 mm thru-axle.

Letters A-P match the geometry diagram.

Check it out, up close.

27.2mm Seatpost

29.8mm collar clamps any standard 27.2mm seatpost. Run the one you like.

Three Bottle Mounts

One on the seat tube, two on the down tube, top and underside. Carry what the ride calls for.

T47 Bottom Bracket

85.5mm threaded T47 shell, set up for wireless 1x drivetrains.

UDH, 142mm Spacing

Universal Derailleur Hanger and 142mm rear spacing, ready for current drivetrains.

Straight 44mm Head Tube

Straight 44mm head tube, built to take a tapered 1-1/2" to 1-1/8" steerer.

ENVE Adventure Fork

Mounts for front racks or bags when the ride goes long.

Where is the Thomahawk built?

Handmade in Georgia from Columbus tubing, this solid frame is built for speed, stability, and durability.

What size bike tires are best for the Thomahawk?

The Thomahawk is designed for 700C wheels with a maximum tire clearance of 2.25″ tires. This setup allows for a smooth, controlled ride on everything from packed gravel to technical terrain.

What other bikes are available?

We build custom high-performance road bikes, mountain bikes, and track bikes as well. Each frame is engineered for durability, precision, and ride quality.

What’s the best setup for the Thomahawk frame on gravel riding?

For gravel riding, we recommend pairing the Tomahawk frame with our
G2 stem
and
carbon drop handlebars
. This combination provides responsive handling and vibration-damping for long days on the trail.

Do steel frames rust?

Rust is a primary concern with steel bike frames, but proper care prevents corrosion. The Thomahawk frame is treated with an anti-corrosion coating, and with routine maintenance, like keeping it clean and dry, it will last a lifetime.