{"product_id":"realspeed-rs40-sl","title":"Realspeed RS40 SL","description":"\u003cp\u003eBuilt 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.\u003c\/p\u003e\u003cp\u003eAt 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.\u003c\/p\u003e\u003cp\u003eThat 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eEvery set is handbuilt in Canada, where skilled wheelbuilders hand-lace, tension, and true each wheel to exacting standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1,295g weight per set — our lightest RS40 build\u003c\/li\u003e\n\u003cli\u003e40mm depth profile, shaped in a bicycle-specific wind tunnel for real-world aero performance\u003c\/li\u003e\n\u003cli\u003eTorayca T1100G ultra-high-modulus carbon fiber construction\u003c\/li\u003e\n\u003cli\u003eHooked rim design — 21mm internal width \/ 28mm external width\u003c\/li\u003e\n\u003cli\u003eSapim CX-Ray aero bladed spokes for reduced weight and drag\u003c\/li\u003e\n\u003cli\u003eCeramic bearings for minimal rolling resistance\u003c\/li\u003e\n\u003cli\u003eInternal spoke nipples for a clean, aerodynamic profile and added protection\u003c\/li\u003e\n\u003cli\u003eHandbuilt in Canada for superior quality control\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhether 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.\u003c\/p\u003e","brand":"Real Speed Cycling","offers":[{"title":"Shimano HG (rims only) \/ None","offer_id":45825506246835,"sku":"RS40SL-SHG-NR","price":1799.0,"currency_code":"CAD","in_stock":true},{"title":"Shimano HG (rims only) \/ 105 \/ 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