Real Speed RS40 SL Disc Wheelset

Built for riders who want to feel every gram of savings, the Realspeed RS40SL is our lightest, most refined wheelset — engineered for those who demand race-day performance without compromise.

At just 1,295 grams for the set, the RS40SL accelerates and climbs with an immediacy that's hard to believe until you feel it — surge out of a corner, attack a punchy rise, or follow a late attack with almost no rotational resistance holding you back. It's the kind of wheel that disappears beneath you, letting you ride on feel rather than fighting inertia.

That exceptional weight comes from a rim built with Torayca T1100G carbon, an ultra-high-modulus fiber that allows for a lighter, stiffer layup than standard carbon construction — shaving grams without sacrificing strength or ride quality. That low weight doesn't come at the cost of aerodynamics: the RS40SL's 40mm rim profile was shaped and refined in a bicycle-specific wind tunnel, so you still get a meaningful aero advantage on the flats and rolling terrain.

The hooked rim design features a modern 21mm internal width and 28mm external width, striking the ideal balance between wide tire support, aerodynamic efficiency, and compatibility with a broad range of tubeless and clincher tires.

Every set is handbuilt in Canada, where skilled wheelbuilders hand-lace, tension, and true each wheel to exacting standards.

Key Features:

• 1,295g weight per set — our lightest RS40 build
• 40mm depth profile, shaped in a bicycle-specific wind tunnel for real-world aero performance
• Torayca T1100G ultra-high-modulus carbon fiber construction
• Hooked rim design — 21mm internal width / 28mm external width
• Sapim CX-Ray aero bladed spokes for reduced weight and drag
• Ceramic bearings for minimal rolling resistance
• Internal spoke nipples for a clean, aerodynamic profile and added protection
• Handbuilt in Canada for superior quality control

Whether you're attacking a hilly road race, racing a crit, or looking for the lightest possible edge on race day, the Realspeed RS40SL gives you uncompromising performance in a featherweight package.