{"product_id":"2026-specialized-propero-4-helmet","title":"2026 Specialized Propero 4 Helmet","description":"\u003cbody\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003ePropero 4 Helmet\u003c\/title\u003e\n\u003cstyle\u003e\n@import url(https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@400;600;700;800\u0026family=Barlow:wght@300;400;500\u0026display=swap);\n:root {\n --black: #0a0a0a;\n --white: #ffffff;\n --mid: #f5f5f5;\n --border: #e0e0e0;\n --text-muted: #777;\n --text-body: #222;\n --tab-bg: var(--mid);\n --tab-text: var(--text-muted);\n --tab-hover-text: var(--black);\n --tab-hover-border: #aaa;\n --tab-active-bg: var(--black);\n --tab-active-text: var(--white);\n --tab-active-border: var(--black);\n}\n[data-theme=\"dark\"] {\n --black: #f5f5f5;\n --white: #0a0a0a;\n --mid: #1a1a1a;\n --border: #333333;\n --text-muted: #999999;\n --text-body: #cccccc;\n --tab-bg: #1a1a1a;\n --tab-text: #999999;\n --tab-hover-text: #f5f5f5;\n --tab-hover-border: #555555;\n --tab-active-bg: #f5f5f5;\n --tab-active-text: #0a0a0a;\n --tab-active-border: #f5f5f5;\n}\n* { box-sizing: border-box; margin: 0; padding: 0; }\n.spur-wrap {\n font-family: 'Barlow', sans-serif;\n background: var(--white);\n color: var(--black);\n max-width: 1100px;\n margin: 0 auto;\n padding: 48px 24px;\n}\n.spur-header {\n display: flex;\n align-items: flex-end;\n justify-content: space-between;\n margin-bottom: 48px;\n border-bottom: 1px solid var(--border);\n padding-bottom: 24px;\n flex-wrap: wrap;\n gap: 12px;\n}\n.spur-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-size: clamp(28px, 5vw, 48px);\n font-weight: 800;\n letter-spacing: -0.02em;\n line-height: 1;\n text-transform: uppercase;\n}\n.spur-meta {\n font-size: 12px;\n font-weight: 500;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--text-muted);\n}\n.spur-tabs {\n display: flex;\n gap: 4px;\n margin-bottom: 32px;\n flex-wrap: wrap;\n}\n.spur-tab {\n font-family: 'Barlow Condensed', sans-serif;\n font-size: 14px;\n font-weight: 700;\n letter-spacing: 0.1em;\n text-transform: uppercase;\n padding: 10px 24px;\n background: var(--tab-bg);\n color: var(--tab-text);\n border: 1px solid var(--border);\n cursor: pointer;\n transition: all 0.15s;\n border-radius: 2px;\n display: inline-block;\n}\n.spur-tab:hover { color: var(--tab-hover-text); border-color: var(--tab-hover-border); }\n.spur-tab.active { background: var(--tab-active-bg); color: var(--tab-active-text); border-color: var(--tab-active-border); }\n.spur-panel { display: none; }\n.spur-panel.active { display: block; }\n.spur-panel p {\n font-size: 14px;\n font-weight: 300;\n line-height: 1.7;\n color: var(--text-body);\n margin-bottom: 16px;\n}\n.desc-intro {\n font-size: 15px;\n font-weight: 400;\n line-height: 1.65;\n color: var(--text-body);\n margin-bottom: 28px;\n padding-bottom: 24px;\n border-bottom: 1px solid var(--border);\n}\nul.desc-list {\n list-style: none;\n padding: 0;\n margin: 0 0 20px 0;\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 6px 24px;\n}\nul.desc-list li {\n font-size: 13px;\n font-weight: 400;\n line-height: 1.5;\n color: var(--text-body);\n}\n.key-section {\n border-bottom: 1px solid var(--border);\n padding: 16px 0;\n}\n.key-section:last-child { border-bottom: none; }\n.key-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-size: 13px;\n font-weight: 700;\n letter-spacing: 0.1em;\n text-transform: uppercase;\n color: var(--black);\n margin-bottom: 6px;\n}\n.key-desc {\n font-size: 14px;\n font-weight: 300;\n color: var(--text-body);\n line-height: 1.5;\n}\n.spec-category {\n font-family: 'Barlow Condensed', sans-serif;\n font-size: 11px;\n font-weight: 700;\n letter-spacing: 0.2em;\n text-transform: uppercase;\n color: var(--black);\n padding: 20px 0 8px;\n border-bottom: 2px solid var(--black);\n margin-bottom: 0;\n}\n.spec-row {\n display: grid;\n grid-template-columns: 200px 1fr;\n border-bottom: 1px solid var(--border);\n}\n.spec-row:hover { background: var(--mid); }\n.spec-key {\n font-size: 12px;\n font-weight: 500;\n letter-spacing: 0.05em;\n text-transform: uppercase;\n color: var(--text-muted);\n padding: 12px 16px 12px 0;\n}\n.spec-val {\n font-size: 14px;\n font-weight: 300;\n color: var(--text-body);\n padding: 12px 0;\n line-height: 1.5;\n}\n@media (max-width: 600px) {\n .spec-row { grid-template-columns: 1fr; }\n .spec-key { padding-bottom: 2px; }\n .spec-val { padding-top: 0; padding-bottom: 12px; }\n ul.desc-list { grid-template-columns: 1fr; }\n}\n\u003c\/style\u003e\n\n\n\u003cdiv class=\"spur-wrap\"\u003e\n\u003cdiv class=\"spur-header\"\u003e\n\u003cdiv class=\"spur-title\"\u003ePropero 4\u003c\/div\u003e\n\u003cdiv class=\"spur-meta\"\u003eRoad Racing · Aero · Ventilation · MIPS Evolve\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spur-tabs\"\u003e\n\u003cbutton class=\"spur-tab active\" onclick=\"showPanel('desc', this)\"\u003eDescription\u003c\/button\u003e\n\u003cbutton class=\"spur-tab\" onclick=\"showPanel('key', this)\"\u003eKey Features\u003c\/button\u003e\n\u003cbutton class=\"spur-tab\" onclick=\"showPanel('specs', this)\"\u003eSpecifications\u003c\/button\u003e\n\u003c\/div\u003e\n\n\u003c!-- DESCRIPTION --\u003e\n\u003cdiv id=\"panel-desc\" class=\"spur-panel active\"\u003e\n\u003cp class=\"desc-intro\"\u003eMeet the all-new Propero 4—it brings the aero advantages of the S-Works Evade 3 together with the ventilation of S-Works Prevail 3, all with the comfort and confidence Specialized helmets are famous for. Every detail was created with our equation for speed in mind: Aerodynamics + Ventilation + Lightweight = Fast.\u003c\/p\u003e\n\n\u003cul class=\"desc-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Watts Faster:\u003c\/strong\u003e Four watts faster than S-Works Prevail 3—15 seconds over 40km, proven in Win Tunnel testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMIPS Evolve Solution:\u003c\/strong\u003e Low-friction layer reduces rotational forces during angled impacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFS3 Fit System:\u003c\/strong\u003e Occipital base adjustment personalizes fit and tunes helmet angle for glasses compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvade 3 Aero DNA:\u003c\/strong\u003e S-Works Evade 3 front-end design language for enhanced aerodynamics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevail 3 Ventilation:\u003c\/strong\u003e Rear-end design with micro-channeling creates continuous airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated Sunglass Storage:\u003c\/strong\u003e Secure eyewear storage when you need them out of the way.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTri-Fix + 10mm Webbing:\u003c\/strong\u003e Adjustable splitter with thin webbing for all-day comfort.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eAerodynamics + Ventilation + Lightweight = Fast. Simple math, dominant results.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- KEY FEATURES --\u003e\n\u003cdiv id=\"panel-key\" class=\"spur-panel\"\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003e4 Watts Faster\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eExtensive testing in CFD and our Win Tunnel proved it—Propero 4 is four watts faster than S-Works Prevail 3. That's 15 seconds over 40km. S-Works Evade 3 aerodynamic leading edge pulled directly into Propero 4.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eMIPS Evolve Solution\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eLow-friction layer allows a sliding motion of 10 to 15mm in all directions. Studies indicate this reduces rotational forces transmitted to the brain during angled impacts—confidence to go fast.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003ePrevail 3 Ventilation DNA\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eDrawing inspiration from S-Works Prevail 3, small 2mm offset micro-channels create turbulence throughout the helmet to generate continuous, refreshing airflow. Not just replicate—elevate.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eFS3 Fit System + Occipital Base Adjustment\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003ePersonalizes fit to individual head shape. Helmet angle can be adjusted for compatibility with glasses—perfectly synched every ride.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"key-section\"\u003e\n\u003cdiv class=\"key-title\"\u003eDedicated Sunglass Storage\u003c\/div\u003e\n\u003cdiv class=\"key-desc\"\u003eMaintains a secure fit and keeps eyewear out of the way when needed. Rattle-free, secure, always accessible.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- SPECIFICATIONS --\u003e\n\u003cdiv id=\"panel-specs\" class=\"spur-panel\"\u003e\n\n\u003cdiv class=\"spec-category\"\u003ePerformance\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSpeed Advantage\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e4 Watts Faster Than S-Works Prevail 3 (15 sec\/40km)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eAero Testing\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eCFD + Win Tunnel\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-category\"\u003eProtection\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eImpact System\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eMIPS Evolve Solution\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eShell\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003ePrecision Full-Wrap Polycarbonate\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-category\"\u003eFit System\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSystem\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eFS3 Fit System\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eAdjustment\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eOccipital Base Adjustment, Glasses Compatibility\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eWeb Splitter\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eTri-Fix (10mm Webbing)\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-category\"\u003eVentilation\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eMicro Channels\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003e2mm Offset Micro-Channels (Prevail 3 DNA)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eRear Vents\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eLarge Rear-End Vents\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-category\"\u003eFeatures\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eEyewear Storage\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eDedicated Sunglass Storage\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-category\"\u003eCompliance\u003c\/div\u003e\n\u003cdiv class=\"spec-row\"\u003e\n\u003cdiv class=\"spec-key\"\u003eSafety Standard\u003c\/div\u003e\n\u003cdiv class=\"spec-val\"\u003eU.S. CPSC Safety Standard for Bicycle Helmets (Age 5+)\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\nfunction showPanel(id, btn) {\n document.querySelectorAll('.spur-panel').forEach(p =\u003e p.classList.remove('active'));\n document.querySelectorAll('.spur-tab').forEach(t =\u003e t.classList.remove('active'));\n document.getElementById('panel-' + id).classList.add('active');\n btn.classList.add('active');\n}\n\u003c\/script\u003e\n\n\n\u003c\/body\u003e","brand":"Specialized","offers":[{"title":"Black \/ S","offer_id":52014765867328,"sku":"60124-0702","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":52014765900096,"sku":"60124-0703","price":230.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":52014765932864,"sku":"60124-0704","price":230.0,"currency_code":"USD","in_stock":true},{"title":"White \/ S","offer_id":52014765965632,"sku":"60124-0712","price":230.0,"currency_code":"USD","in_stock":true},{"title":"White \/ M","offer_id":52014765998400,"sku":"60124-0713","price":230.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 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L","offer_id":52014766522688,"sku":"60126-0724","price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0446\/7487\/5549\/files\/Propero4Black1.jpg?v=1779124160","url":"https:\/\/spokex.com\/products\/2026-specialized-propero-4-helmet","provider":"SX Collective","version":"1.0","type":"link"}