{"product_id":"shimano-fc-r7100-105-2-12-speed-crankset-50-34t-170mm-length-hollowtech-ii-oe","title":"Shimano FC-R7100 105 2*12 Speed Crankset 50-34T 170mm Length Hollowtech II-OE","description":"\u003cstyle\u003e\n  .yanzo-tab-container {\n    font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, sans-serif;\n    margin-top: 15px;\n    width: 100%;\n    box-sizing: border-box;\n  }\n\n  \/* 隐藏单选框原生的 radio 按钮 *\/\n  .yanzo-tab-container input[type=\"radio\"] {\n    display: none;\n  }\n\n  \/* 采用 4 列等宽网格（Grid 1:1:1:1），保证间距绝对均匀 *\/\n  .yanzo-tab-headers {\n    display: grid;\n    grid-template-columns: repeat(4, 1fr);\n    border-bottom: 2px solid #E5E7EB;\n    margin-bottom: 20px;\n    width: 100%;\n    text-align: center;\n  }\n\n  .yanzo-tab-headers label {\n    padding: 10px 0;\n    font-size: 11px;\n    font-weight: 700;\n    letter-spacing: 0.2px;\n    color: #6B7280;\n    background: none;\n    border-bottom: 2px solid transparent;\n    margin-bottom: -2px;\n    cursor: pointer;\n    text-transform: uppercase;\n    transition: all 0.2s ease;\n    white-space: nowrap;\n    overflow: hidden;\n    text-overflow: ellipsis;\n  }\n\n  \/* 选中状态下的 Tab 按钮样式 *\/\n  #tab-desc:checked ~ .yanzo-tab-headers label[for=\"tab-desc\"],\n  #tab-specs:checked ~ .yanzo-tab-headers label[for=\"tab-specs\"],\n  #tab-qa:checked ~ .yanzo-tab-headers label[for=\"tab-qa\"],\n  #tab-shipping:checked ~ .yanzo-tab-headers label[for=\"tab-shipping\"] {\n    color: #111827;\n    border-bottom-color: #111827;\n  }\n\n  \/* 内容面板默认隐藏 *\/\n  .yanzo-tab-panel {\n    display: none;\n  }\n\n  \/* 根据选中的 Radio 显示对应的内容面板 *\/\n  #tab-desc:checked ~ .yanzo-tab-content #content-desc,\n  #tab-specs:checked ~ .yanzo-tab-content #content-specs,\n  #tab-qa:checked ~ .yanzo-tab-content #content-qa,\n  #tab-shipping:checked ~ .yanzo-tab-content #content-shipping {\n    display: block;\n  }\n\n  \/* 详情页排版样式 *\/\n  .yanzo-h2 {\n    font-size: 17px;\n    font-weight: 800;\n    letter-spacing: 0.5px;\n    text-transform: uppercase;\n    margin: 0 0 6px 0;\n    color: #111827;\n  }\n  .yanzo-subhead {\n    font-size: 12px;\n    font-weight: 700;\n    text-transform: uppercase;\n    color: #4B5563;\n    margin: 0 0 12px 0;\n    letter-spacing: 0.3px;\n  }\n  .yanzo-intro {\n    font-size: 13px;\n    line-height: 1.6;\n    color: #4B5563;\n    margin-bottom: 20px;\n    padding-bottom: 16px;\n    border-bottom: 1px solid #F3F4F6;\n  }\n  .yanzo-features-title {\n    font-size: 14px;\n    font-weight: 800;\n    text-transform: uppercase;\n    letter-spacing: 0.5px;\n    margin-bottom: 10px;\n  }\n  .yanzo-list {\n    margin: 0;\n    padding-left: 18px;\n  }\n  .yanzo-list li {\n    font-size: 13px;\n    line-height: 1.6;\n    color: #374151;\n    margin-bottom: 8px;\n  }\n  .yanzo-list li strong {\n    color: #111827;\n  }\n\n  \/* Q\u0026A 专属样式 *\/\n  .yanzo-qa-item {\n    margin-bottom: 16px;\n    padding-bottom: 12px;\n    border-bottom: 1px dashed #E5E7EB;\n  }\n  .yanzo-qa-item:last-child {\n    border-bottom: none;\n  }\n  .yanzo-qa-q {\n    font-size: 13px;\n    font-weight: 700;\n    color: #111827;\n    margin-bottom: 4px;\n    display: flex;\n    gap: 6px;\n  }\n  .yanzo-qa-a {\n    font-size: 13px;\n    line-height: 1.5;\n    color: #4B5563;\n    padding-left: 22px;\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"yanzo-tab-container\"\u003e\n  \u003c!-- 隐藏的控制状态 Radio 按钮 --\u003e\n  \u003cinput type=\"radio\" id=\"tab-desc\" name=\"yanzo-tabs\" checked\u003e\n  \u003cinput type=\"radio\" id=\"tab-specs\" name=\"yanzo-tabs\"\u003e\n  \u003cinput type=\"radio\" id=\"tab-qa\" name=\"yanzo-tabs\"\u003e\n  \u003cinput type=\"radio\" id=\"tab-shipping\" name=\"yanzo-tabs\"\u003e\n\n  \u003c!-- 网格平分 4 个 Tab 按钮 --\u003e\n  \u003cdiv class=\"yanzo-tab-headers\"\u003e\n    \u003clabel for=\"tab-desc\"\u003eDETAILS\u003c\/label\u003e\n    \u003clabel for=\"tab-specs\"\u003eSPECS\u003c\/label\u003e\n    \u003clabel for=\"tab-qa\"\u003eQ\u0026amp;A\u003c\/label\u003e\n    \u003clabel for=\"tab-shipping\"\u003eSHIPPING\u003c\/label\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- 选项卡对应的具体内容区域 --\u003e\n  \u003cdiv class=\"yanzo-tab-content\"\u003e\n    \u003c!-- 面板 1: DETAILS --\u003e\n    \u003cdiv class=\"yanzo-tab-panel\" id=\"content-desc\"\u003e\n      \u003cdiv class=\"yanzo-h2\"\u003eSHIMANO 105 FC-R7100 12-SPEED ROAD CRANKSET\u003c\/div\u003e\n      \u003cdiv class=\"yanzo-subhead\"\u003eHOLLOWTECH II DESIGN — 170MM ARM LENGTH \/ 50-34T COMPACT CHAINRINGS\u003c\/div\u003e\n      \u003cdiv class=\"yanzo-intro\"\u003e\n        Elevate your road riding performance with the Shimano 105 FC-R7100 12-speed crankset. Striking the ideal balance between stiffness, strength, weight, and rotational efficiency, this hollow-forged aluminum crankset provides crisp, precise front shifting under heavy pedaling loads. Featuring a versatile 50-34T compact chainring combination and 170mm crank arms, it offers smooth cadence control and optimal power transfer for steep climbs and high-speed flats alike.\n      \u003c\/div\u003e\n      \u003cdiv class=\"yanzo-features-title\"\u003eFEATURES\u003c\/div\u003e\n      \u003cul class=\"yanzo-list\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOptimal Balance of Rigidity \u0026amp; Weight:\u003c\/strong\u003e Hollowglide \/ Hollowtech II technology minimizes weight while maximizing structural power transfer.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCompact 50-34T Gearing:\u003c\/strong\u003e Provides an ideal gear range for climbing efficiency and versatile all-around road riding.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e12-Speed Drivetrain Optimized:\u003c\/strong\u003e Specially shaped chainring teeth ensure seamless alignment and lightning-fast shifting with Shimano 12-speed HG chains.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSleek Gloss Black Finish:\u003c\/strong\u003e Features an elegant, anodized aluminum finish that perfectly matches Shimano 105 R7100 series components.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOEM Bulk Packaged:\u003c\/strong\u003e 100% genuine, brand-new Shimano component delivered in cost-effective workshop bulk packaging without standard retail boxes.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- 面板 2: SPECS --\u003e\n    \u003cdiv class=\"yanzo-tab-panel\" id=\"content-specs\"\u003e\n      \u003cul class=\"yanzo-list\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SHIMANO\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 105 R7100 Series\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e FC-R7100\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCrank Arm Length:\u003c\/strong\u003e 170 mm\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eChainring Combination:\u003c\/strong\u003e 50-34T (Compact)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDrivetrain Compatibility:\u003c\/strong\u003e 2x12-Speed\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSpindle Interface:\u003c\/strong\u003e HOLLOWTECH II (24mm spindle)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eBolt Circle Diameter (BCD):\u003c\/strong\u003e 110 mm (Asymmetrical 4-Arm)\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eChainline:\u003c\/strong\u003e 44.5 mm\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eQ-Factor:\u003c\/strong\u003e 148 mm\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eRecommended Bottom Bracket:\u003c\/strong\u003e SM-BBR60 (Threaded) \/ SM-BB72-41B (Press-Fit) — *Sold Separately*\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Genuine Shimano Workshop \/ Bulk Packaging\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- 面板 3: Q\u0026A --\u003e\n    \u003cdiv class=\"yanzo-tab-panel\" id=\"content-qa\"\u003e\n      \u003cdiv class=\"yanzo-qa-item\"\u003e\n        \u003cdiv class=\"yanzo-qa-q\"\u003e\n\u003cspan\u003eQ:\u003c\/span\u003e Is this crankset compatible with 11-speed Shimano drivetrains?\u003c\/div\u003e\n        \u003cdiv class=\"yanzo-qa-a\"\u003eA: The FC-R7100 is engineered specifically for Shimano 12-speed road drivetrains. For optimal shifting precision and chain retention, it should be paired with a 12-speed chain and front derailleur.\u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"yanzo-qa-item\"\u003e\n        \u003cdiv class=\"yanzo-qa-q\"\u003e\n\u003cspan\u003eQ:\u003c\/span\u003e Does the crankset include a bottom bracket?\u003c\/div\u003e\n        \u003cdiv class=\"yanzo-qa-a\"\u003eA: No, bottom brackets are sold separately so you can select the exact fit for your bike frame's BB shell (e.g., SM-BBR60 or SM-BB72-41B).\u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"yanzo-qa-item\"\u003e\n        \u003cdiv class=\"yanzo-qa-q\"\u003e\n\u003cspan\u003eQ:\u003c\/span\u003e Is this an authentic Shimano product?\u003c\/div\u003e\n        \u003cdiv class=\"yanzo-qa-a\"\u003eA: Yes, it is 100% authentic and brand-new Shimano stock supplied in OEM workshop packaging to offer maximum savings.\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- 面板 4: SHIPPING --\u003e\n    \u003cdiv class=\"yanzo-tab-panel\" id=\"content-shipping\"\u003e\n      \u003cul class=\"yanzo-list\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eProcessing Time:\u003c\/strong\u003e Ships within 24–48 hours from our California warehouse.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eDelivery Time:\u003c\/strong\u003e Standard shipping usually arrives within 3–7 business days across the US mainland.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTracking:\u003c\/strong\u003e Tracking information will be emailed immediately once your package is dispatched.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":53804920275244,"sku":"MK196-170-US","price":116.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0944\/3357\/5212\/files\/Shimano_105_FC-R7100_12_speed_road_crankset_50-34T_170mm_front_view.jpg?v=1787304116","url":"https:\/\/yanzocycling.com\/products\/shimano-fc-r7100-105-2-12-speed-crankset-50-34t-170mm-length-hollowtech-ii-oe","provider":"YanzoCycling","version":"1.0","type":"link"}