XDS X Lab GT8 Review: A Carbon Gravel Bike Built for Speed

Introduction

XDS is one of the largest bicycle manufacturers in China, producing millions of bikes a year and building carbon frames for a long list of other brands. X Lab is the company’s high-end sub-brand, reserved for its most expensive models, in the same way that S-Works sits above Specialized. The X Lab GT8 is its new carbon gravel bike, and it arrives with a specification that looks unusual for the money: a full carbon frame and fork, wireless electronic shifting, and carbon wheels at a US RRP of $3,199.

That price is the headline. XDS has kept it low by leaning on in-house components and a factory-to-consumer structure rather than a conventional brand markup, and on paper the GT8 reads like a far more expensive bike. The real question is whether the details hold up once you look past the spec sheet.

Who the XDS X Lab GT8 Is For

Gravel covers a wide spectrum, from heavy bikepacking rigs at one end to near-road bikes at the other. The GT8 sits firmly toward the racy end, with enough mounting options to keep light adventure riding on the table. It suits riders entering off-road events, riders chasing personal bests on local climbs, and road cyclists who are used to light carbon frames with electronic gears and want a gravel bike that does not feel like a step down.

The low weight also matters for anyone who has to carry a bike up stairs at the end of a ride. XDS markets the GT8 around adventure and comfort, but the build and the frame design lean more toward gravel racing than loaded touring.

Main Strengths

The complete bike weighs 8.83 kg (19 lb 10 oz) in size medium, measured without pedals. Tire clearance is 55 mm, which reaches into cross-country mountain bike territory and makes the frame genuinely versatile. The bottom bracket is a threaded T47, and the frame uses thru-axles front and rear.

The drivetrain is a 1x12 wireless Shimano GRX Di2 RX717 groupset with a 10-51 cassette and a 42-tooth chainring. Around it, XDS specs its own Branta components: an alloy chainset with an integrated power meter, 45 mm deep 700c carbon wheels, a carbon seatpost, a carbon stem, and a carbon handlebar with internal brake hose routing. The saddle is a Fizik Terra Argo X7, and the tires are 45 mm Continental Terra Trail set up tubeless.

The wheels measure 28 mm internally with hooked rims, steel spokes, and hubs that resemble a ratchet design. They come in at 726 g front and 860 g rear, and they arrived true with consistent spoke tension. The crankset is the 170 mm version at 839 g, and the power meter is included at no extra cost.

Build quality is a strong point. Paint and finish are clean, with no overspill around the bolts, and every threaded interface engages smoothly, including the headset and the through axles. Six sizes run from extra small to extra extra large, and crank length, stem length, and handlebar width scale with frame size. The handlebars are flared: the medium uses 39 cm bars with controls measuring roughly 35 cm.

Practical details are well handled too. The seatpost is a round 27.2 mm, so a dropper post is an option, and the seatpost clamp is external, which keeps hardware from falling into the frame during travel. There are extra bottle cage bosses on the top tube, down tube, and fork, plus a storage compartment in the down tube.

Frame, Wheels, and Drivetrain Notes

Two details are worth understanding before ordering. The first is the chain: the GT8 uses an SUMC chain rather than a Shimano one, while the rotors and cassette remain Shimano. It is a small substitution inside an otherwise complete groupset. The second is the power meter. It is included in the crankset, but no independent testing or public documentation for it is available, so riders who train by power should treat its numbers as unverified until third-party data appears.

The wheels are the most impressive part of the package on paper. Wide hooked rims, consistent tension, and a sensible weight are exactly what a fast gravel bike needs, and the hub internals use a ratchet design that has been common in the industry for years.

Things to Consider Before Buying

The GT8 uses proprietary headset spacers, which means running the supplied stem unless a custom solution is made. The brake hoses are routed internally, which adds a little work at service time. The frame also relies on a small bag inside the down tube storage compartment to stop items dropping into the bottom bracket area, and XDS confirms that bag ships with the bike.

Sizing deserves attention. A medium suited a rider around 5 ft 9.5 in, and that medium is close in size to a small from at least one other gravel brand. Geometry charts and, ideally, a professional bike fit are the right way to choose a size at this price. Component sizing is a related consideration: on XDS premium road models a free component swap is offered at purchase, while GT8 buyers can order alternative component options directly from their dealer.

Availability is the other practical question. XDS is still establishing its Western operations, with a dealer network being built alongside direct-to-consumer sales. International launches are planned simultaneously, with country-specific distributors and dealer networks in place or being set up in Norway, Spain, Italy, Costa Rica, New Zealand, Mexico, Canada, the UAE, South Korea, Taiwan, and other markets. Warranty coverage is stated as two years on parts and a lifetime warranty on carbon frame sets.

None of these points are dealbreakers, but they matter more when a brand is new to your region. Buyers who value a mature local service network may want to wait until distribution settles.

Pricing and Value

At $3,199 (roughly £2,400), the GT8 undercuts much of the carbon gravel market. Comparable entry-level carbon race frames from brands known for sharp pricing, such as the Canyon Grail CF SL, typically do not include electronic gears or carbon wheels without spending considerably more, and the same applies at similar price points from Specialized.

The savings come from vertical integration rather than corner cutting. XDS manufactures its own Branta components, so margins are shorter and the parts are not marked up through a third party. US buyers should budget for state sales tax on top of the listed RRP.

Buying Advice

If your priority is speed per dollar on gravel, the GT8 is a compelling package: a light carbon frame, 55 mm clearance, wireless 1x12 shifting, carbon wheels, and a power meter crankset for the price of many mechanically geared rivals. It rewards riders who want to go fast on rough surfaces rather than carry heavy loads over long distances.

Before ordering, confirm three things: your size against the geometry chart, that the down tube storage bag is included, and what dealer support looks like in your country. Ask about component sizing options at the point of purchase, since changes afterward can be expensive. Riders who want a fully proven power meter or a long-established service network in their region may prefer to wait, but for everyone else the value proposition is difficult to argue with.

Conclusion

The XDS X Lab GT8 is a fast, well-finished carbon gravel bike at a price that is hard to match. Its strengths are clear: low weight, generous tire clearance, modern wireless shifting, and quality wheels. Its caveats are equally clear: proprietary cockpit parts, an untested power meter, and a distribution network that is still maturing. Buyers who weigh those trade-offs carefully will find a lot of bike for the money.