The Ventum GS1 GRX Di2 is built around Shimano’s flagship gravel racing groupset.
The Ventum GS1 GRX Di2 is built around Shimano’s flagship gravel racing groupset.

GS1 GRX Di2

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Lighter. Simpler. Sharper. The new GS1 GRX Di2  gravel bike is built for one thing — speed.

In gravel racing, speed is a constantly evolving equation. The latest generation of the GS1 meets this challenge with increased tire clearance — up to 700x56c in the front, 700x45c in the rear —  a lighter, stiffer frame, and an all-new aerodynamic front end.

 

All anchored by our signature Ventum Race Geometry, a geo trusted by some of the world’s top gravel racers.  Fast, but stable. Snappy, but predictable. It’s road bike speed dipped in gravel bike capability. The perfect choice for those driven to go further, faster. 

 

Don’t just ride. Ride quick.

 

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$6,799.00
CUSTOMIZE YOUR FIT (OPTIONAL)+
Do you want a specific crank length and/or handlebar size? Our bikes come stock with touchpoints that fit most riders, but you can choose your bar/stem size and crank length for a small fee. Questions? Reach out to support for help.
WHAT IS THE STOCK FIT?
Finance with Klarna
Pay over time with monthly financing*
*Monthly financing through Klarna issued by WebBank.
Ride-Ready Shipping
New bike day, shipped direct to your door. Each bike is pre-assembled and tuned by a professional mechanic before being packed into our custom ride-ready box (lower 48 US States only). Assembly is easy — just attach the wheels and insert the seatpost.
30-Day Returns
Change your mind? Return your bike within 30-days of purchase.
Limited Lifetime Warranty
We stand behind our bikes. Ventum offers a limited lifetime warranty on all of our frames, forks, and seat posts to the original owner which covers against defects in materials and workmanship.
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The Ventum GS1 GRX Di2 is built around Shimano’s flagship gravel racing groupset.

GS1 GRX Di2

$6,799.00
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ABOUT THE VENTUM GS1 GRX Di2

 

Shaped by our obsession with speed, the third generation GS1 is our clearest expression of what a gravel bike should be: simple, fast, and focused. 

 

To make it faster, we increased tire clearance, cut weight, and improved aerodynamics — all without compromising the thing that matters most: handling. 

 

What didn’t change? The geometry. We kept our proven Ventum Race Geometry — aggressive, with a tucked rear end and stable steering. Fitting big tires — especially in the rear — presents real design challenges. Many brands have compromised handling in the name of clearance. We didn’t. 


This version of the GS1 gravel bike comes with the Shimano GRX Di2 2x12  electronic groupset and ZIPP 303 XPLR S wheels. Complete with the Ventum CR5 one-piece gravel cockpit, it’s a race-ready machine. 


Fast, but stable. Snappy, yet predictable. It’s road bike speed, dipped in gravel bike capability. A bike for those driven to go further, faster. 

 

WHAT YOU GET

 

• Shimano GRX Di2 2x12-speed electronic drivetrain 
• ZIPP 303 XPLR S carbon race wheels
• Ventum C52 carbon one-piece bar/stem combo 
• A  full carbon fiber frame with intuitive internal cable routing 
• Tire clearance to700x56c in the front and  700x45c in the rear


VENTUM CUSTOMER SUPPORT + RIDE READY SHIPPING

 

Each Ventum bike begins life at our facility in Heber City, Utah, at the doorstep of some of the best riding this side of… anywhere. 

 

No matter the build, any bike we send out into the world is first built, checked, and thoroughly tuned by a professional mechanic. With a bill of good health, it’s then repackaged into a specially-made ride-ready box designed to transport the bike to the rider with as little disassembly as possible. In the end, all you need to do is attach the front wheel, insert the seat post, and dial in your fit.  

 

We’re here to help along the way. From picking your bike to support down the road, the Ventum customer support team is here for anything you need. 

 

VENTUM GS1 GRX Di2 FEATURES 

AN ALL-NEW FRONT END

Taking cues from the new Tempus TT bike, an hourglass head tube utilizes functional airfoils to smooth airflow over rider and bike. Because in modern gravel racing, aero matters.  

VENTUM RACE GEOMETRY

The GS1’s geometry is something we hold near and dear to our hearts at Ventum. Adored by our pro riders and obsessed over by our engineers, it’s quick in corners yet wonderfully predictable and stable at high speeds over variable terrain. 

FOR TIRES, BIGGER IS BETTER 

The new GS1 takes up to 700x56c tires in the front and *700x45c tires in the rear — plenty big for today’s knobbier, fatter gravel tires. 

 

*Tire clearance on 2x drivetrains is limited to 700x45c.

VENTUM GS1 - SHIMANO GRX Di2 - SPECIFICATIONS

FRAMESET
FRAME
Ventum GS1 V3 gravel frame | Full carbon fiber construction | Internal cable routing | T47 threaded BB | Flat mount disc brake | UDH
FORK
Ventum GS1 fork | Tapered carbon steerer | Internal brake routing | Flat mount disc brake | Carbon dropouts
WHEELS
FRONT WHEEL
ZIPP 303 XPLR S | Tubeless, disc brake | Carbon
REAR WHEEL
ZIPP 303 XPLR S | Tubeless, disc brake | Carbon | HG Driver
TIRES
Goodyear XPLR Inter | 700x45c
MAX TIRE SIZE
Front: 700x56c | Rear: 700x45c
DRIVETRAIN
SHIFTERS
Shimano GRX Di2 | 2x12 speed | Electronic shifting
FRONT DERAILLEUR
Shimano GRX Di2 | 2x12 speed | Electronic shifting
REAR DERAILLEUR
Shimano GRX Di2 | 2x12 speed | Electronic shifting
CRANK
XS: Shimano GRX Crankset | 48/31T chainrings | 170mm crank length
S: Shimano GRX Crankset | 48/31T chainrings | 170mm crank length
M: Shimano GRX Crankset | 48/31T chainrings | 170mm crank length
M/L: Shimano GRX Crankset | 48/31T chainrings | 172.5mm crank length
L: Shimano GRX Crankset | 48/31T chainrings | 172.5mm crank length
XL: Shimano GRX Crankset | 48/31T chainrings | 175mm crank length
BOTTOM BRACKET
Shimano T47 Outboard
CASSETTE
Shimano GRX | 11-36T
CHAIN
Deore XT | CN-M8100
COMPONENTS
SADDLE
Vento Argo R5 | 150mm
SEATPOST
Ventum carbon post | 0° offset
HANDLEBAR / STEM
XS: VENTUM CR5 Integrated Cockpit | 40x90
S: VENTUM CR5 Integrated Cockpit | 40x90
M: VENTUM CR5 Integrated Cockpit | 42x90
M/L: VENTUM CR5 Integrated Cockpit | 42x90
L: VENTUM CR5 Integrated Cockpit | 42x90
XL: VENTUM CR5 Integrated Cockpit | 44x100
COMPUTER MOUNT
Not included
HANDLEBAR TAPE
FSA Powertouch, black
BRAKES
Shimano Dura Ace Di2 | Hydraulic
BRAKE ROTORS
Shimano GRX | RT-CL800 Centerlock | 160mm Front /160mm Rear
STOCK FIT INFORMATION
XS
170mm crank length | 40cm bar length | 90mm stem length
S
170mm crank length | 40cm bar length | 90mm stem length
M
170mm crank length | 42cm bar length | 90mm stem length
M/L
172.5mm crank length | 42cm bar length | 90mm stem length
L
172.5mm crank length | 42cm bar length | 90mm stem length
XL
175mm crank length | 44cm bar length | 100mm stem length

Please note: Ventum reserves the right to make changes to the information listed on this page at any time. This includes spec, pricing, color, and any other product details. Due to supply chain issues, compatible parts may be substituted at any time without notice. 

VENTUM GS1 SIZING GUIDE

VENTUM GS1 GRX Di2 GEOMETRY

FRAME SIZE XS S M M/L L XL
(A) STACK 506 522 545 570 589 604
(B) REACH 369 375 384 393 402 411
(C) HEAD TUBE LENGTH 90 105 128 150 166 180
(D) CHAINSTAY LENGTH 420 420 420 420 420 420
(E) FRONT CENTER 594 601 614 622 627 636
(F) WHEELBASE 1004 1012 1024 1032 1037 1046
(G) BOTTOM BRACKET DROP 70 70 70 70 70 70
(H) SEAT TUBE ANGLE 72.5° 72.5° 72.5° 72.5° 72.5° 72.5°
(I) HEAD TUBE ANGLE 69° 69.5° 70° 71° 72° 72.5°
(J) TOP TUBE LENGTH, Horizontal 529 540 556 573 588 601
(K) SEAT TUBE LENGTH 485 502 525 550 569 584
(L) STAND OVER HEIGHT 769 786 808 833 852 866
(M) TRAIL 87.9/83.3 84.6/79.9 81.2/76.5 74.6/69.9 68/63.3 64.7/59.9
(N) FORK LENGTH, FULL 395 395 395 395 395 395
(O) FORK OFFSET (Not Shown) 45/50 45/50 45/50 45/50 45/50 45/50

VENTUM GS1 GRX Di2 SERVICE

CONTACT SUPPORT

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Home Reviews 1

"Ironman Sweden was my first race on my new bike from Ventum, a Shimano Dura Ace 12-speed. The aero comfort is easy to adjust to the perfect fit and with the fantastic disc brakes it is easy to keep a good rhythm through the corners. With the Ventum One, I achieved my fastest bike split at Ironman Sweden."

- Jesper Svensson

Home Reviews 2

“There is nothing I would rather use to sail the gravel seas of eastern Nebraska than my GS1 (except for maybe a tandem). Its smooth comfort allowed me to carry my speed and momentum over the tops of every one of the endless rollers on the Gravel Worlds course. I was able to open gaps through the loose corners all day long, thanks to the bike’s stability and nimble handling, and there’s just no arguing with a 22 mph average speed over 150 miles, with 11,000 feet of elevation gain, on a course that’s 98% gravel, on my way to 2nd place out of a very talented pro field."

- John Borstelmann

Home Reviews 3

"The GS1 is everything I want in a gravel bike. The combination of smooth cruising on pavement and steady rolling over rowdy terrain makes it the most dynamic bike. From champagne gravel to chunky single track, my GS1 has performed beautifully through it all. Let’s not forget that it has ample tire clearance and is aesthetically stunning!"

- Lindsey Stevenson

SUPPORT

We Stand Behind Our Products

Ventum stands behind the quality our bikes, engineering, and all of our products. Each item is meticulously desined in-house by our team of passionate riders. Our goal is to elevate your experience and to deliver products that can withstand all normal rugged wear and tear that comes with competing in a triathlon, running a crit series, or enjoying a long gravel road to nowhere.

If you are not satisfied with your order, contact our customer support team about our 30-day return policy or let us know how we can make Ventum better.

Sizing

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Ordering, Shipping, Warranty, & Returns

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Lead time varies depending on the build specs and component availability. Please reach out to support@ventumracing.com for more information.

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For Standard shipping in the continental US, Ventum uses a custom, oversized bike box and the bike will arrive 98% assembled. You simply need to install the wheels and seatpost and you’ll be ready to ride. A torque wrench is required.

For bikes shipped outside of the continental US, the bike will arrive 85% assembled. Upon delivery, you will need to install the wheels, seatpost, and the stem onto the steerer tube.

Financing & Trade-Ups

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Submit your bike directly to The Pro’s Closet, and share their offer with support@ventumracing.com. The trade-up value will be deducted from your order total. We’ll need to email you a custom invoice, so don’t order online before speaking with Ventum Support. The trade-up bike will need to be shipped to The Pro’s Closet within 2 weeks–we supply the shipping label.

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Yes, we offer financing through Klarna for most customers in the USA.

General Product Information

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Ventum One Disc - 28mm max (700x28C)

NS1 - Tires measuring up to 35mm in width (700x35C)

GS1 - Tires measuring up to 48mm in width (700x48C) *The GS1 can run 650b wheels, with tires measuring up to 51 mm in width

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NS1 and Ventum One Disc builds will be set up tubeless when upgraded to carbon wheelsets. Alloy wheels are setup with inner tubes and clincher tires.

All GS1 builds will be set up tubeless regardless of the wheelset.