HED Jet RC4 Performance Rim Brake Tubeless Wheelset

The HED Jet RC4 Performance Rim Brake Tubeless Wheelset is the shallowest, lightest option in HED's Jet RC Performance lineup, built for riders who still run rim-brake road bikes and want a genuine aero and stiffness upgrade without switching brake systems entirely. At a 38mm rim depth, it's positioned as the all-rounder of the RC family, sitting below the 60mm RC6 and 90mm RC9 options — deep enough to pick up a real aerodynamic benefit on flat and rolling roads, but shallow enough to stay light, responsive, and stable in crosswinds on an exposed climb or descent.

HED has been building wide rims longer than most of the industry has been talking about them: the company pioneered the wide rim movement back in 2007 with the original Jet Plus at a 21mm internal width, and the Jet RC4 carries that same 21mm internal, 25mm external rim profile forward. That width shapes tubeless and clincher tires into a rounder, more supported profile, which improves cornering grip and lets riders run somewhat lower pressures for comfort without the tire feeling unsupported at the sidewall. The rim uses a hooked bead rather than a hookless design, which keeps it compatible with a wider range of tire and tube setups — a detail that matters for riders who aren't exclusively running the latest tubeless-specific tires, and the rim is rated to a maximum 80 psi, in line with modern tubeless road pressures rather than older high-pressure clincher setups.

The defining feature of the Jet RC4, and the rest of the Jet RC Performance series, is the hybrid construction: a carbon aero fairing bonded over an alloy brake track. Full-carbon rim brake wheels have a well-documented weakness — braking heat can soften resin and, on long descents, degrade braking performance right when you need it most. HED's approach sidesteps that problem entirely by keeping the actual braking surface alloy, so pad contact and heat dissipation behave like a traditional aluminum rim while the carbon fairing around it does the aerodynamic work. For a rider who wants aero gains but isn't willing to gamble on carbon braking performance in the mountains or in the wet, that's a meaningful trade-off in HED's favor, and it's the reason these wheels still show up under riders doing real racing and high-mileage training rather than just casual group rides.

Each wheel spins on HED's Sonic hubs with sealed cartridge bearings, laced with 18 spokes up front and 24 in the rear — a lower front spoke count that trims weight and drag where the wheel carries less load, paired with a sturdier rear lacing built to handle drivetrain torque and braking forces. The complete wheelset comes in at approximately 1,605 grams, respectable for a wheel that's still carrying an alloy brake track rather than a full-carbon layup, and hub bodies are available for either Shimano HG or SRAM XDR cassettes, so the wheelset fits into most existing rim-brake road drivetrains without forcing a cassette swap.

All of this is still handbuilt in the USA at HED's Roseville, Minnesota facility, a detail that matters to riders who care about how and where their wheels are actually assembled rather than just where the brand is headquartered. It's the kind of manufacturing pedigree that shows up less in any single spec and more in how consistently the wheel holds true over time and how it's supported if something ever needs attention down the road.

On the road, the combination of a 38mm depth and 21mm internal width gives the Jet RC4 a ride feel that favors quick acceleration and predictable handling over outright top-end aero gains — it responds well out of a group ride sprint and doesn't fight you in a crosswind the way a deeper rim can. This is a wheelset for riders holding onto a rim-brake road bike they have no intention of replacing, but who want a real step up in speed and stiffness over stock aluminum wheels. It suits long training rides, club racing, and century-distance events where aero efficiency matters but reliable braking on a fast descent matters more — and it's a sensible entry point into the Jet RC Performance family for anyone who later wants to add a deeper RC6 or RC9 wheel for race day.