{"product_id":"trek-seat-mast-clamp-rail-assembly-bolt","title":"S-Parts Titanium Seat Mast Clamp Rail Assembly Bolt - Compatible with TREK","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size:20px;\"\u003e\u003cu\u003eS-Parts TC4 Titanium Seat Mast Clamp Bolt\u003c\/u\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003cem\u003eTrek Integrated Seat Mast Compatible — M6 x 35 — Deep 5mm Hex\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eA small part — but one that matters.\u003c\/p\u003e\u003cp\u003eTrek seat mast hardware sits right in the spray zone, gets torqued repeatedly, and is one of the first areas to show corrosion over time. This S-Parts titanium clamp bolt is a direct replacement for Trek integrated seat mast clamp hardware, made from \u003cstrong\u003eGrade 5 (TC4) titanium\u003c\/strong\u003e for long-term reliability, clean finish, and consistent clamping.\u003c\/p\u003e\u003cp\u003eBuilt for year-round bikes. Finished for high-end builds.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eDirect fit for Trek integrated seat mast systems on:\u003c\/p\u003e\u003cp\u003e✅ \u003cstrong\u003eMadone (2016+)\u003c\/strong\u003e\u003cbr\u003e✅ \u003cstrong\u003eDomane (2019+)\u003c\/strong\u003e\u003cbr\u003e✅ \u003cstrong\u003eSpeed Concept (2022+)\u003c\/strong\u003e\u003cbr\u003e✅ Trek \u003cstrong\u003eroad alloy mast cap\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eSpecs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eThread:\u003c\/strong\u003e M6\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSize:\u003c\/strong\u003e M6 x 35\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eLength:\u003c\/strong\u003e 30mm (typical, model dependent)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e S-Parts \u003cstrong\u003eTC4 Titanium (Ti-6Al-4V)\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.95g per bolt\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eTool Required:\u003c\/strong\u003e Deep \u003cstrong\u003e5mm Hex\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFinish Options:\u003c\/strong\u003e Candy, Blue, Black, Titanium\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eDetails that matter\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eCNC machined for clean threads and smooth torque feel\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eTitanium strength + corrosion resistance (no rust, no seized hardware)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eSubtle S-Parts branding: laser-etched graphics + stamped head logo\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eDesigned for consistent clamp force and long-term stability\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eInstallation Note\u003c\/h3\u003e\u003cp\u003eUse a torque wrench and always follow \u003cstrong\u003eTrek’s official torque specification\u003c\/strong\u003e for your seat mast clamp.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAftermarket component. Not affiliated with or endorsed by Trek Bicycle Company.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch1\u003e\u003cstrong\u003eWhy Choose S-Parts Titanium Bolts \u0026amp; Screws?\u003c\/strong\u003e\u003c\/h1\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSmall upgrade. Massive difference.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eS-Parts are one of the most respected names in \u003cstrong\u003etitanium bicycle bolts and screws\u003c\/strong\u003e, producing lightweight bike hardware designed for riders who care about performance and finishing detail. Since 2010, they’ve specialised in precision fixings for \u003cstrong\u003eroad, gravel, mountain and performance builds\u003c\/strong\u003e — helping riders reduce weight, prevent corrosion, and finish a bike properly.\u003c\/p\u003e\u003cp\u003eWhether you’re chasing grams or building a clean custom colourway, S-Parts is one of the easiest ways to upgrade the details that most bikes leave behind.\u003c\/p\u003e\u003cp\u003eWith \u003cstrong\u003e1000+ bolt and screw options\u003c\/strong\u003e, S-Parts covers everything from cockpit hardware and bottle cages to drivetrain, brake and suspension fixings.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eWhy Titanium?\u003c\/h2\u003e\u003cp\u003eStock hardware works — until it doesn’t.\u003c\/p\u003e\u003cp\u003eTitanium is trusted across cycling because it offers an elite balance of:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003elow weight\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ehigh strength\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ecorrosion resistance\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003elong-term durability\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eS-Parts components are manufactured from \u003cstrong\u003eTC4 Grade 5 titanium (Ti-6Al-4V)\u003c\/strong\u003e — an aerospace-grade alloy known for excellent fatigue resistance and strength-to-weight performance.\u003c\/p\u003e\u003cp\u003eMany S-Parts titanium bolts and screws offer strength comparable to high tensile steel hardware, while weighing significantly less and staying corrosion-free year-round.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eS-Parts Bolt \u0026amp; Screw Colour Options\u003c\/h2\u003e\u003cp\u003eS-Parts titanium hardware is available in \u003cstrong\u003e9 standout colourways\u003c\/strong\u003e:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eBlue\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eBlack\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eCandy\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eGold\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eGreen\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eIndigo\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003ePurple\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eRainbow\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eTitanium\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePerfect for matching frames, finishing kits, accent builds and custom upgrades.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eHow Are S-Parts Bolts \u0026amp; Screws Coloured?\u003c\/h2\u003e\u003cp\u003eS-Parts uses two proven finishing methods to achieve durable, high-end colourways:\u003c\/p\u003e\u003ch3\u003eVacuum Nitriding\u003c\/h3\u003e\u003cp\u003eUsed for:\u003cbr\u003e\u003cstrong\u003eBlack, Blue, Gold, Rainbow\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA hard-wearing surface treatment designed for durability and long-term appearance.\u003c\/p\u003e\u003ch3\u003eAnodising\u003c\/h3\u003e\u003cp\u003eUsed for:\u003cbr\u003e\u003cstrong\u003eCandy, Green, Indigo, Purple\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAn electrochemical process that creates vivid colours while maintaining titanium’s natural corrosion resistance.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eMeasuring Your Bolts \u0026amp; Screws (Important)\u003c\/h2\u003e\u003cp\u003eBolt sizing can be confusing — especially when brands measure hardware differently.\u003c\/p\u003e\u003cp\u003eFor S-Parts products, \u003cstrong\u003ebolt and screw length refers to the shaft length only\u003c\/strong\u003e:\u003cbr\u003e✅ measured from \u003cstrong\u003eunder the bolt head\u003c\/strong\u003e to the \u003cstrong\u003eend of the thread\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eS-Parts thread sizes range from \u003cstrong\u003eM3 through to M10\u003c\/strong\u003e, covering the most common bicycle applications.\u003c\/p\u003e\u003cp\u003eIf you’re unsure what size you need, contact us — we’ll help you match the correct part.\u003c\/p\u003e\u003chr\u003e\u003ch3\u003eInstallation Note\u003c\/h3\u003e\u003cp\u003eAlways follow your component manufacturer’s official installation instructions and torque settings. 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