{"product_id":"summit-sl42-carbon-road-wheelset","title":"Threshold Cycling | Summit SL42 Carbon Road Wheelset | Industry Nine 1\/1 \u0026 Sapim CX-Ray","description":"\u003ch2\u003eThe Unfair Advantage on Climbs\u003c\/h2\u003e\n\u003cp\u003eMeet the \u003cstrong\u003eSummit SL42\u003c\/strong\u003e, a sub-1,350g pure climbing weapon engineered to strip rotational weight, defy gravity, and leave the peloton behind. Handbuilt for the uncompromising cyclist, we bypassed the heavy factory markups to pair the world’s most trusted premium components into one ridiculously fast, lightweight package.\u003c\/p\u003e\n\u003cp\u003eWhether you're hunting local KOMs or surviving all-day mountain epics, the Summit SL42 delivers explosive acceleration and razor-sharp handling without sacrificing everyday durability. We started with a blank-canvas, high-modulus carbon rim optimized for climbing. At \u003cstrong\u003e42mm deep\u003c\/strong\u003e, it offers a noticeable aerodynamic advantage on the flats and descents while remaining stable in crosswinds.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern 25mm Internal \/ 32mm External Width:\u003c\/strong\u003e Perfectly optimized for modern 28c-32c tires. This wide stance creates a flush, aerodynamic profile while allowing you to drop tire pressures for unmatched grip, vibration damping, and rolling efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHooked Rim Profile:\u003c\/strong\u003e Maximum versatility and safety. Compatible with both tubeless tires and standard clinchers with inner tubes—with zero hookless tire restrictions or 73 PSI pressure limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStealth Gloss Finish:\u003c\/strong\u003e A pristine, \u003cstrong\u003eno-decals\u003c\/strong\u003e gloss clear coat that drops jaws and wipes clean effortlessly after gritty rides.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Heart: Industry Nine 1\/1 Hubs\u003c\/h3\u003e\n\u003cp\u003eBuilt around the legendary performance heritage of \u003cstrong\u003eIndustry Nine 1\/1 Road Hubs\u003c\/strong\u003e. Machined in Asheville, North Carolina, these hubs take a no-nonsense approach to precision, remaining confident and capable of cleaning the A-line while leaving budget for a season of bucket list rides. They feature a robust dual phased-pawl drive mechanism utilizing a six-pawl driver and a 45-tooth drive ring. This accomplishes a blistering \u003cstrong\u003e90 points of engagement (4° engagement)\u003c\/strong\u003e. The moment you put power to the pedals on a steep pitch, the transfer is instantaneous.\u003c\/p\u003e\n\u003ch3\u003eThe Muscle: Sapim CX-Ray Spokes \u0026amp; Secure Lock Nipples\u003c\/h3\u003e\n\u003cp\u003eLaced with the undisputed king of spokes: the \u003cstrong\u003eSapim CX-Ray\u003c\/strong\u003e. Forged from high-tensile steel into an aerodynamic blade, the CX-Ray offers the weight of a titanium spoke with a legendary fatigue life that outlasts standard round spokes by millions of cycles. We anchor them with \u003cstrong\u003eSapim Polyax Locking Alloy Nipples\u003c\/strong\u003e to shave every possible gram from the outer edge of the wheel while ensuring your tension stays perfectly true, season after season.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFree\u003c\/strong\u003e, fully insured shipping included.\u003c\/p\u003e\n\u003ch3\u003eOfficial 2-Year Limited Warranty \u0026amp; Crash Protection\u003c\/h3\u003e\n\u003cp\u003eEvery Summit SL42 wheelset is engineered and assembled for uncompromising reliability. We back every wheelset with a comprehensive two-tier protection policy for the original owner:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Year Limited Manufacturer Warranty:\u003c\/strong\u003e Full coverage against defects in materials and craftsmanship for two (2) full years from the date of purchase. Because we build with authentic Industry Nine 1\/1 hubs and Sapim spokes, your wheels are backed by genuine manufacturer component coverage and direct US customer support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubsidized Crash Replacement Support:\u003c\/strong\u003e We know real-world cycling happens. If your rim suffers damage in a crash, race incident, or severe road hazard, we provide an at-cost crash replacement program with discounted factory rebuild service to get you back rolling without paying retail price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended Use:\u003c\/strong\u003e Road Racing, Climbing, Fast Endurance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Material:\u003c\/strong\u003e High-Modulus Superlight Carbon Fiber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Profile:\u003c\/strong\u003e Hooked (Crochet) Clincher \/ Tubeless Ready\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim Depth:\u003c\/strong\u003e 42mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Width:\u003c\/strong\u003e 25mm (Optimized for 28mm - 32mm tires)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Width:\u003c\/strong\u003e 32mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHubs:\u003c\/strong\u003e Industry Nine 1\/1 Road Disc (Centerlock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngagement:\u003c\/strong\u003e 90 P.O.E. (4-degrees)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpokes:\u003c\/strong\u003e Sapim CX-Ray Bladed (24 Front \/ 24 Rear)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipples:\u003c\/strong\u003e Sapim Polyax 14G Locking Alloy (Black)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Type:\u003c\/strong\u003e Disc Brake (Centerlock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle Spacing:\u003c\/strong\u003e 12x100mm Front \/ 12x142mm Rear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreehub Options:\u003c\/strong\u003e Shimano HG (11\/12-Speed)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e ~1,320g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRider Weight Limit:\u003c\/strong\u003e 250 lbs (113 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2-Year Limited Warranty + Subsidized Crash Replacement Program\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubeless Setup:\u003c\/strong\u003e Pre-installed Silca Ultimate Tape \u0026amp; Silca Ultimate Valves included\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Threshold Cycling","offers":[{"title":"Default Title","offer_id":48868632723712,"sku":"420SL-24-i911","price":1457.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/8097\/9456\/files\/1_summit_sl42_carbon_road_wheelset_hero.jpg?v=1789338616","url":"https:\/\/thresholdcycling.com\/products\/summit-sl42-carbon-road-wheelset","provider":"Threshold Cycling","version":"1.0","type":"link"}