2026 composite gravel bike
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A lightweight composite gravel bike with Shimano GRX RX-820 2×12 gearing and carbon wheels, adjustable geometry, integrated frame storage and clearance for tires up to 53 mm.
Key performance factors
Fast, stable and adaptable
Lightweight efficiency
The Advanced-grade composite frame and fork create a responsive platform for acceleration, climbing and long gravel rides.
Comfort and control
The Contact XR D-Fuse handlebar and composite D-Fuse seatpost help reduce vibration while maintaining precise handling on rough terrain.
Route-ready versatility
A flip-chip dropout adjusts wheelbase and tire clearance, while integrated down-tube storage keeps tools and ride essentials inside the frame.
Technology
Premium components with practical range
Advanced composite
High-performance composite construction balances low weight, stiffness and ride compliance.
D-Fuse system
The shaped handlebar and seatpost work together to reduce vibration and improve comfort on uneven surfaces.
OverDrive steering
A tapered composite steerer and oversized headset bearings support precise front-end control.
Flip-chip dropout
Choose shorter handling with 45 mm tire clearance or a longer, more stable setup with clearance up to 53 mm.
Fit
Sizing guide
Sizing is a reference only. Confirm final size with Boulder Nordic & Cycle Sport.
| Size | Height | Height |
|---|---|---|
| XS | 150-163 cm | 4'11"-5'4" |
| S | 158-169 cm | 5'2"-5'7" |
| M | 164-175 cm | 5'5"-5'9" |
| L | 170-181 cm | 5'7"-5'11" |
Frame dimensions
Geometry
Measurements are in millimeters. Paired values show short | long flip-chip positions.
| Measurement | XS | S | M | L |
|---|---|---|---|---|
| Seat tube length | 390 | 420 | 465 | 500 |
| Seat tube angle | 74.5 | 74.4 | 74.5 | 74.4 | 74.5 | 74.4 | 74.5 | 74.4 |
| Top tube length | 525 | 535 | 545 | 555 |
| Head tube length | 90 | 110 | 140 | 160 |
| Head tube angle | 70.0 | 69.9 | 70.5 | 70.4 | 71.0 | 70.9 | 71.0 | 70.9 |
| Fork rake | 50 | 50 | 50 | 50 |
| Trail | 78.4 | 82.0 | 75.0 | 78.5 | 71.6 | 75.1 | 71.6 | 75.0 |
| Wheelbase | 1012 | 1022 | 1019 | 1029 | 1026 | 1036 | 1043 | 1052 |
| Chainstay | 425 | 435 | 425 | 435 | 425 | 435 | 430 | 440 |
| BB drop | 80 | 81 | 80 | 81 | 80 | 81 | 80 | 81 |
| Stack | 523 | 524 | 544 | 545 | 574 | 575 | 593 | 594 |
| Reach | 380 | 379 | 384 | 383 | 386 | 385 | 391 | 389 |
| Standover | 681 | 688 | 708 | 715 | 748 | 755 | 779 | 786 |
| Handlebar width | 400 | 400 | 420 | 420 |
| Stem length | 50 | 60 | 70 | 80 |
| Crank length | 170 | 170 | 172.5 | 172.5 |
Build details
Specifications
Sizes
XS, S, M, L
Color
Camel Silk/Chrome
Frame
Advanced-grade composite, 12x142 mm thru-axle, flat-mount disc, flip-chip dropout, integrated down-tube storage
Fork
Advanced-grade composite, full-composite OverDrive steerer, 12 mm thru-axle, flat-mount disc, FSA stainless bearings
Handlebar
Giant Contact XR D-Fuse, 31.8 mm, 5-degree back sweep, flared drop; XS/S 400 mm, M/L 420 mm
Bar tape
Liv All Condition
Stem
Giant Contact AeroLight, -10 degrees; XS 50, S 60, M 70, L 80 mm
Seatpost
Giant D-Fuse composite, 14 mm offset
Saddle
Liv Grit
Shifters
Shimano GRX RX-820, 2x12
Front derailleur
Shimano GRX RX-820
Rear derailleur
Shimano GRX RX-820
Brakes
Shimano GRX RX-820 hydraulic, Shimano RT-70 160 mm rotors front and rear
Brake levers
Shimano GRX RX-820 hydraulic
Cassette
Shimano CS-HG710, 12-speed, 11-36
Chain
KMC X12L-1
Crankset
Shimano GRX RX-820, 31/48; XS/S 170, M/L 172.5 mm
Bottom bracket
Shimano, press fit
Rims
Giant CXR 2 carbon, 35 mm depth
Hubs
Front Giant alloy CenterLock; rear Giant AR alloy, 3-pawl driver, 36t, CenterLock; 12 mm thru-axles
Spokes
Sapim Sprint
Tires
Giant Crosscut Grip, 700x45c, tubeless
Extras
Tubeless prepared, ISC clamp and in-frame storage bag
Maximum tire clearance
45 mm short position; 53 mm long position
Specifications and component availability may change without notice. Bike weight varies by size, finish, hardware and accessories.
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