{"product_id":"bola-700c-carbon-tubeless-road-rim-45mm-deep-21mm-internal-wide","title":"Bola 700c Carbon Tubeless Road Rim – 45mm Deep, 21mm Internal Wide","description":"\u003ch2\u003eBola 700c Carbon Tubeless Road Rim — 45mm Deep, 28mm Wide\u003c\/h2\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheel Size\u003c\/td\u003e\n\u003ctd\u003e700c\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Profile\u003c\/td\u003e\n\u003ctd\u003eU-shape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRim Depth\u003c\/td\u003e\n\u003ctd\u003e45mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Width\u003c\/td\u003e\n\u003ctd\u003e28mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Width\u003c\/td\u003e\n\u003ctd\u003e21mm (hooked) \/ 23mm (hookless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eERD\u003c\/td\u003e\n\u003ctd\u003e548mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e6.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpoke Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e4.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Hole Diameter\u003c\/td\u003e\n\u003ctd\u003e7.5mm (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNipple Angle (Front\/Rear)\u003c\/td\u003e\n\u003ctd\u003e7° \/ 5°–7° (customizable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin \/ Max Tire Pressure\u003c\/td\u003e\n\u003ctd\u003e100 \/ 125 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Rider Weight\u003c\/td\u003e\n\u003ctd\u003e120 kg (264 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWeight Options\u003c\/h2\u003e\n\u003ctable style=\"width: 100.036%; height: 98px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003cth style=\"width: 20.6684%; height: 19.6px;\"\u003eGrade\u003c\/th\u003e\n\u003cth style=\"width: 25.1984%; height: 19.6px;\"\u003eWeight per Rim\u003c\/th\u003e\n\u003cth style=\"width: 50.7465%; height: 19.6px;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 20.6684%; height: 19.6px;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"width: 25.1984%; height: 19.6px;\"\u003e430 ± 15 g\u003c\/td\u003e\n\u003ctd style=\"width: 50.7465%; height: 19.6px;\"\u003eTraining, durability-focused builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 20.6684%; height: 19.6px;\"\u003eSuper Light\u003c\/td\u003e\n\u003ctd style=\"width: 25.1984%; height: 19.6px;\"\u003e405 ± 10 g\u003c\/td\u003e\n\u003ctd style=\"width: 50.7465%; height: 19.6px;\"\u003eAll-round racing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 20.6684%; height: 19.6px;\"\u003eUltra Light\u003c\/td\u003e\n\u003ctd style=\"width: 25.1984%; height: 19.6px;\"\u003e375 ± 10 g\u003c\/td\u003e\n\u003ctd style=\"width: 50.7465%; height: 19.6px;\"\u003eClimbing and lightweight builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 20.6684%; height: 19.6px;\"\u003eExtreme Light\u003c\/td\u003e\n\u003ctd style=\"width: 25.1984%; height: 19.6px;\"\u003e355 ± 10 g\u003c\/td\u003e\n\u003ctd style=\"width: 50.7465%; height: 19.6px;\"\u003eWeight-optimized race builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eStructural Performance Data\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForward Compressive Strength:\u003c\/strong\u003e \u0026gt;300 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLateral Torsion Resistance:\u003c\/strong\u003e \u0026gt;50 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpoke Hole Tension Rating:\u003c\/strong\u003e \u0026gt;280 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDynamic Equilibrium (balance):\u003c\/strong\u003e \u0026lt;3 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlatness Tolerance:\u003c\/strong\u003e \u0026lt;0.15 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoundness Tolerance:\u003c\/strong\u003e \u0026lt;0.3 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHooked vs. Hookless: Which Should You Choose?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHooked (21mm inner width):\u003c\/strong\u003e Compatible with all clincher and tubeless road tires. Recommended for riders using tires rated below ETRTO hookless certification, or for mixed-surface use where higher pressures may be needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHookless (23mm inner width):\u003c\/strong\u003e Provides a larger air volume, improved ride compliance, and aerodynamic tire-rim integration at lower pressures (recommended 72–87 psi with compatible tires). Requires ETRTO-approved hookless-compatible tires only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility \u0026amp; Build Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTubeless-ready straight from the factory — no conversion tape required on the rim bed\u003c\/li\u003e\n\u003cli\u003eCompatible with standard road hubs (100mm front \/ 130mm or 142mm rear)\u003c\/li\u003e\n\u003cli\u003eSupports both center-lock and 6-bolt disc configurations when spec'd at build\u003c\/li\u003e\n\u003cli\u003eCustom spoke, valve, and assembly hole diameters available on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eIs a 28mm wide rim better than 25mm for aerodynamics?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, for tires 28c and wider. The 28mm outer width creates a continuous aero profile with 28–32c tires, reducing the 'light bulb' effect. For 25c tires, the aerodynamic benefit is marginal but the larger air volume still reduces rolling resistance.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eHow light should a carbon road rim be for climbing?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eFor dedicated climbing builds, rims under 400 g per rim are considered competitive. The Ultra Light (390 g) and Extreme Light (370 g) grades fall within this range. Riders prioritizing durability over pure weight should select the Standard (470 g) or Super Light (430 g) grade.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eAre hookless rims safe for road cycling?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, when used with ETRTO-certified hookless-compatible tires at the manufacturer's recommended pressure (typically 72–87 psi for road). The hookless bead design is used by major OEM wheel manufacturers and is validated under ETRTO 2023 tubeless road standards.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat tire sizes are compatible with this rim?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe 21mm hooked inner width is optimized for 25c–32c tires. The 23mm hookless inner width is best matched to 28c–35c tires for an aerodynamically flush profile.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes this rim come with a warranty?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes. A three-year manufacturer's warranty covers structural defects under normal riding conditions. Warranty excludes crash damage and use outside the stated rider weight or pressure limits.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Carbon Fiber Sporting Goods","offers":[{"title":"UD Matt \/ 20\/20 \/ Standard","offer_id":48646254330110,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Glossy \/ 20\/20 \/ Standard","offer_id":48646254362878,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble  Matt \/ 20\/20 \/ Standard","offer_id":48646254395646,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"Marble Glossy \/ 20\/20 \/ Standard","offer_id":48646254428414,"sku":null,"price":310.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 20\/20 \/ Superlight","offer_id":48646254461182,"sku":null,"price":320.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 20\/20 \/ Ultralight","offer_id":48646254493950,"sku":null,"price":330.0,"currency_code":"USD","in_stock":true},{"title":"UD Matt \/ 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