X-LAB GT8 GRX717 Di2 Slipstream
- Price
- $5,799.99
Adventure-ready gravel bike built for control, comfort, and conquest.
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.
Key Features
Branta C45 Gravel carbon wheelset
Shimano GRX 717 Di2 groupset
Branta alloy crankset with integrated power meter and Apple Find My anti-theft technology
In-frame storage and accessory mounting points on frame and fork
| Model | GT8 |
| Frame | X-LAB Carbon Frame, Toray T800, UDH Compatible |
| Fork | X-LAB Carbon Fork, 100x12mm Thru-axle |
| Stem | Branta Carbon Stem |
| Handlebar | Branta Gravel Carbon Handlebar |
| Seatpost | XDS Carbon 27.2mm Seatpost |
| Rear Derailleur | Shimano GRX RD-RX717 |
| Front Derailleur | / |
| Shifters | Shimano GRX ST-RX717 |
| Brakes | Shimano GRX BR-RX715 |
| Cassette | Shimano CS-M6200-12, 10-51T |
| Crankset | Branta Aluminum Power Meter Crankset, 40T, Narrow-wide Teeth, 29mm Aluminum Spindle, Apple Find My Anti-Theft Technology |
| Bottom Bracket | T47 24mm |
| Rotors | Shimano SM-RT70, Front: 160mm / Rear: 160mm |
| Chain | Shimano CN-M6100 |
| Wheelset | Branta C45 GT Carbon Wheelset, Steel Spokes |
| Tires | Continental Terra Trail 700x45C |
| Saddle | Fizik Terra Argo X7 |
| Weight | 8.78KG (Size M) |
| Frame | Size | XS | S | M | L | XL | XXL |
| A | Stack (mm) | 519 | 540 | 565 | 584 | 607 | 631 |
| B | Reach (mm) | 370 | 379 | 384 | 392 | 399 | 408 |
| C | Head Tube Angle (deg) | 70 | 70 | 71 | 71 | 71 | 71 |
| D | Head Tube Length (mm) | 80 | 100 | 120 | 140 | 165 | 190 |
| E | Seat Tube Angle (deg) | 76 | 75 | 74 | 74 | 73 | 73 |
| F | Seat Tube Length (mm) | 435 | 447 | 471 | 491 | 532 | 577 |
| G | Chainstay Length (mm) | 435 | 435 | 435 | 435 | 435 | 435 |
| H | BB Drop (mm) | 80 | 80 | 80 | 80 | 80 | 80 |
| I | Wheelbase (mm) | 1020 | 1032 | 1031 | 1046 | 1061 | 1078 |
| J | Top Tube Length (mm) | 506 | 525 | 547 | 566 | 585 | 605 |
| K | Front Center (mm) | 598 | 610 | 609 | 624 | 638 | 655 |
| L | Stand-over Height (mm) | 715 | 730 | 755 | 773 | 807 | 838 |
| M | Fork Rake/Offset (mm) | 55 | 55 | 50 | 50 | 50 | 50 |
| N | Trail (mm) | 75 | 72 | 70 | 70 | 70 | 70 |
| Components | XS | S | M | L | XL | XXL | |
| Stem | 70 | 70 | 80 | 90 | 100 | 100 | |
| Handlebar | 370/430 | 370/430 | 390/450 | 390/450 | 410/470 | 410/470 | |
| Crankset | 165 | 165 | 170 | 170 | 172.5 | 172.5 | |
| Seat Post | 300 | 300 | 350 | 350 | 350 | 350 |
| Sizing | Size | XS | S | M | L | XL | XXL |
| Recommended Rider Height | 148 cm – 158 cm 4'10" - 5'2" |
158 cm – 168 cm 5'2" - 5'6" |
168 cm – 176 cm 5'6" - 5'9" |
176 cm – 183 cm 5'9" - 6'0" |
183 cm – 191 cm 6'0" - 6'3" |
191 cm – 202 cm 6'3" - 6'7" |
Shipping Information
Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.
About Us
Bikefit Marlborough exists to grow Cycling, through our Knowledge, Passion and outstanding Customer Service.