GT8 Frameset

  • CARBON
  • GRAVEL
  • TRAIL

Adventure-ready gravel bike built for control, comfort, and conquest.

$9,999 Free Ground Shipping

  • "Absolute dead-center of the current gravel consensus" - Velo
  • 55mm tire clearance
  • The adventurer's dream mount
  • Built-in power meter and downtube storage

or as low as $150/mo with

HSA/FSA eligible for qualified customers

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What's my size?

Find out in 3 steps

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  • background email M
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Not sure what size you should ride? Visit one of our dealers in your area. Find A Dealer

Delivery within 14 days

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Size Chart

GT8 Frameset

Frame Size Rider Height
XS (46cm) 148 cm – 158 cm 4' 10" - 5' 2"
S (50cm) 158 cm – 168 cm 5' 2" - 5' 6"
M (54cm) 168 cm – 176 cm 5' 6" - 5' 9"
L (56cm) 176 cm – 183 cm 5' 9" - 6' 0"
XL (58cm) 183 cm – 191 cm 6' 0" - 6' 3"
XXL (62cm) 191 cm – 202 cm 6' 3" - 6' 7"
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Sizing Guide

Sizing Guide

When purchasing a new bicycle, choosing the right size can do wonders for your ride experience. Use this sizing guide as a reference. If you’re in between two sizes, you can size up or down depending on your riding preference.

For the best results, we’d recommend visiting one of the many bike shops in our network to be fitted properly by a professional.

Your Measurements

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Size Recommendation

Based on your measurements, we recommend this frame size.

Best size for you: —

Your measurements: —

Best size for you: —

Based on your measurements, your recommended size is —. However, to ensure your comfort, safety, and the best riding experience, we recommend visiting an authorized X-LAB dealer to test ride both sizes before making your final decision.

Let’s Find Your Best Fit

Your measurements appear to fall outside our current size range for this bike. For your comfort, safety, and best riding experience, we recommend speaking with an authorized X-LAB dealer or contacting our support team before choosing a size.

GT8 Frameset Free Ground Shipping

Afterburner Black Size: - Quantity: 1

$9,999
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X-LAB GT8

The GT8 is X-LAB’s first gravel platform, built for riders who see every road as an invitation.

Designed for stability, control, and long-distance comfort, the GT8 transitions effortlessly from pavement to dirt, city streets to open trails.

With confident handling and durable carbon construction, it’s a gravel bike that encourages exploration without limits.

Wherever the road disappears, the GT8 keeps going.

Where Gravel Gets Interesting

The GT8 is made for the rides that don’t follow a route. It was born to master uneven terrain, unknown turns, and long mixed-surface days where stability, speed, and confidence all matter at once.

Clearance That Changes the Ride

With up to 55mm tire clearance, the GT8 opens the door to bigger comfort, more grip, and more capability wrapped in colorways that look as fierce as they feel.

The Seat Stay Advantage

A unique seat stay design balances strength, compliance, and precision handling. The GT8 is built to maximize ride performance while staying true to modern gravel standards and race-ready intent.

The Branta Advantage is Exclusive to X-LAB

The Branta Advantage is Exclusive to X-LAB

See Our In-House Components

Highlights GT8 Frameset

  • Key Features

    In-frame storage and accessory mounting points on frame and fork

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    In-frame storage and accessory mounting points on frame and fork

  • Technical Specifications

    FRAME

    XDS Carbon Frame, Toray T-800, UDH Compatible

    FORK

    XDS Carbon Fork, Toray T-800, 100x12mm Thru-Axle

    SEATPOST

    XDS Carbon 27.2mm

    WEIGHT

    8.78 kg / 19.31 lbs (Size M)

    SIZE OPTIONS

    XS / S / M / L / XL / XXL

    *Continuous Product Improvement

    Innovation never stands still. As part of our commitment to building the best possible bicycles, X-LAB reserves the right to update specifications, components, colors, and other product details at any time without notice. We make every effort to keep our published specifications current, but minor variations may occur between production batches. Please contact your local X-LAB dealer or Customer Support if you would like to confirm the latest specifications before purchase.

  • product geometry anchor

    Geometry & Dimensions

    Basic geometry
    title XS S M L XL XXL
    A — Seat Tube Length 435mm 447mm 471mm 491mm 532mm 577mm
    B — Top Tube Length 506mm 525mm 547mm 566mm 585mm 605mm
    C — Head Tube Length 80mm 100mm 120mm 140mm 165mm 190mm
    D — Seat Tube Angle 76° 75° 74° 74° 73° 73°
    E — Head Tube Angle 70° 70° 71° 71° 71° 71°
    F — Chainstay 435mm 435mm 435mm 435mm 435mm 435mm
    G — Wheelbase 1020mm 1032mm 1031mm 1046mm 1061mm 1078mm
    H — Bottom Bracket Drop 80mm 80mm 80mm 80mm 80mm 80mm
    I — Stack 519mm 540mm 565mm 584mm 607mm 631mm
    J — Reach 370mm 379mm 384mm 392mm 399mm 408mm
    K — Front Center 598mm 610mm 609mm 624mm 638mm 655mm
    O — Stand Over 715mm 730mm 755mm 773mm 807mm 838mm
    • A — Seat Tube Length 435mm
      B — Top Tube Length 506mm
      C — Head Tube Length 80mm
      D — Seat Tube Angle 76°
      E — Head Tube Angle 70°
      F — Chainstay 435mm
      G — Wheelbase 1020mm
      H — Bottom Bracket Drop 80mm
      I — Stack 519mm
      J — Reach 370mm
      K — Front Center 598mm
      O — Stand Over 715mm
    • A — Seat Tube Length 447mm
      B — Top Tube Length 525mm
      C — Head Tube Length 100mm
      D — Seat Tube Angle 75°
      E — Head Tube Angle 70°
      F — Chainstay 435mm
      G — Wheelbase 1032mm
      H — Bottom Bracket Drop 80mm
      I — Stack 540mm
      J — Reach 379mm
      K — Front Center 610mm
      O — Stand Over 730mm
    • A — Seat Tube Length 471mm
      B — Top Tube Length 547mm
      C — Head Tube Length 120mm
      D — Seat Tube Angle 74°
      E — Head Tube Angle 71°
      F — Chainstay 435mm
      G — Wheelbase 1031mm
      H — Bottom Bracket Drop 80mm
      I — Stack 565mm
      J — Reach 384mm
      K — Front Center 609mm
      O — Stand Over 755mm
    • A — Seat Tube Length 491mm
      B — Top Tube Length 566mm
      C — Head Tube Length 140mm
      D — Seat Tube Angle 74°
      E — Head Tube Angle 71°
      F — Chainstay 435mm
      G — Wheelbase 1046mm
      H — Bottom Bracket Drop 80mm
      I — Stack 584mm
      J — Reach 392mm
      K — Front Center 624mm
      O — Stand Over 773mm
    • A — Seat Tube Length 532mm
      B — Top Tube Length 585mm
      C — Head Tube Length 165mm
      D — Seat Tube Angle 73°
      E — Head Tube Angle 71°
      F — Chainstay 435mm
      G — Wheelbase 1061mm
      H — Bottom Bracket Drop 80mm
      I — Stack 607mm
      J — Reach 399mm
      K — Front Center 638mm
      O — Stand Over 807mm
    • A — Seat Tube Length 577mm
      B — Top Tube Length 605mm
      C — Head Tube Length 190mm
      D — Seat Tube Angle 73°
      E — Head Tube Angle 71°
      F — Chainstay 435mm
      G — Wheelbase 1078mm
      H — Bottom Bracket Drop 80mm
      I — Stack 631mm
      J — Reach 408mm
      K — Front Center 655mm
      O — Stand Over 838mm
    Component geometry
    title XS S M L XL XXL
    Fork Rake/Offset 55mm 55mm 50mm 50mm 50mm 50mm
    Trail 75mm 72mm 70mm 70mm 70mm 70mm
    Handlebar 370/430mm 370/430mm 390/450mm 390/450mm 410/470mm 410/470mm
    Stem 70mm 70mm 80mm 90mm 100mm 100mm
    Crankset 165mm 165mm 170mm 170mm 172.5mm 172.5mm
    Seat Post 300mm 300mm 350mm 350mm 350mm 350mm
    • Fork Rake/Offset 55mm
      Trail 75mm
      Handlebar 370/430mm
      Stem 70mm
      Crankset 165mm
      Seat Post 300mm
    • Fork Rake/Offset 55mm
      Trail 72mm
      Handlebar 370/430mm
      Stem 70mm
      Crankset 165mm
      Seat Post 300mm
    • Fork Rake/Offset 50mm
      Trail 70mm
      Handlebar 390/450mm
      Stem 80mm
      Crankset 170mm
      Seat Post 350mm
    • Fork Rake/Offset 50mm
      Trail 70mm
      Handlebar 390/450mm
      Stem 90mm
      Crankset 170mm
      Seat Post 350mm
    • Fork Rake/Offset 50mm
      Trail 70mm
      Handlebar 410/470mm
      Stem 100mm
      Crankset 172.5mm
      Seat Post 350mm
    • Fork Rake/Offset 50mm
      Trail 70mm
      Handlebar 410/470mm
      Stem 100mm
      Crankset 172.5mm
      Seat Post 350mm

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