DT Swiss HX 1700 Spline 27.5" 6-Bolt Disc Brake Rear Wheel

The DT Swiss HX 1700 Spline 27.5" 6-Bolt Disc Brake Rear Wheel is an aluminum mountain bike wheel built for the loads that e-MTBs and hard-ridden trail bikes put through a rear hub. It pairs a wide 650B rim with DT Swiss's 350 hub, and it comes in the 6-bolt rotor mount format with an XD driver body for the cassette.

A wide, tubeless-ready rim

The HX 1700 Spline uses an aluminum rim with a 30mm inner width and a 35mm outer width. That is a modern trail-width profile, and it gives a tire's casing a broad, supported footprint rather than pinching it between narrow walls. Wider rims generally let you run a tire at lower pressure with a more predictable sidewall, which matters when you are braking late into a rock garden or loading the rear tire hard through a berm. The rim is compatible with both clincher and tubeless setups, so you can run sealant and drop pressure for traction, or fit tubes if that suits your riding better.

The HX family is DT Swiss's line aimed at e-MTB and heavy-duty trail use, and the "Spline" name refers to the HX 1700 platform's rim and hub package rather than a separate wheel type.

350 hub, 12x148mm Boost

At the center is the DT Swiss 350 hub, one of the most widely specified mountain bike hubs in the aftermarket and OEM world. DT Swiss has described its redesigned 350 hub for this wheel family as having an enlarged hub body, intended to handle the higher braking and drive torque that comes with motor assistance. On a rear wheel that is doing the work of putting power down and slowing a heavier bike, that is the part you want to be overbuilt rather than marginal.

This rear wheel uses a 12x148mm Boost thru-axle, the current standard on most modern trail, enduro and e-MTB frames. Check that your frame is Boost-spaced before ordering, since this wheel will not fit a 142mm rear end without adapters and re-dishing. The rotor mounts with six bolts, so it takes a 6-bolt disc rather than a Centerlock one. This listing is the Black version with an XD driver, which is the freehub body used by SRAM XD and XX1-style 12-speed cassettes.

Built for heavier loads

The wheel is built with 28 DT Swiss Hybrid 1 straight-pull double-butted spokes, a pattern that is designed to be stiff and to resist the lateral loads of cornering at speed. DT Swiss rates the HX 1700 Spline for a combined rider and bike weight up to 150 kg, a figure that makes it relevant for heavier riders and for e-bikes, where the bike alone weighs well beyond a conventional trail bike.

The finish is black, so it works with most frame colors and will not look out of place on a darkened-out build.

Who it is for

This is a rear wheel for riders on 27.5" e-MTBs and trail bikes who want a wide rim and a proven hub without stepping up to carbon. It makes sense as a replacement for a damaged or worn-out stock rear wheel, or as an upgrade if your current rim is narrow and you want better tire support. If you are building or rebuilding a 27.5" bike with Boost spacing, a 6-bolt rotor and an XD driver cassette, it covers the specification in one wheel.

The HX 1700 Spline is also sold in other axle and rotor configurations, so confirm the 12x148mm Boost spacing, 6-bolt rotor mount and XD driver all match your frame, brakes and drivetrain before you order. If you are unsure, the RA Cycles team can help you check compatibility.