{"product_id":"titanium-bolt-m5x30-35-40mm-bicycle-seatpost-screw-for-bicycle-replacement-parts-pitch-0-8mm-1-set-by-tianswer","title":"Titanium Bolt M5x30 35 40mm Bicycle Seatpost Screw for Bicycle Replacement Parts, 1 Set, by Tianswer","description":"\u003cp\u003e\u003cstrong\u003eUltra-lightweight Aerospace Ti-6Al-4V Grade 5 titanium M5 bicycle seatpost replacement hardware kit featuring an integrated articulated cylindrical barrel nut and spherical concave washer, engineered for two-bolt micro-adjust saddle clamps on road, gravel, and mountain bikes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eArticulated Barrel Nut \u0026amp; Spherical Concave Washer Geometry\u003c\/h3\u003e\n\u003cp\u003eUnlike rigid standard nuts that introduce bending stresses into long bolt shanks when adjusting saddle tilt, our seatpost kit includes a precision CNC-machined 16mm long × 8.5mm diameter cylindrical barrel nut and a 2.0mm thick spherical concave washer. As you fine-tune saddle angle, the barrel nut and curved washer pivot fluidly inside the seatpost yoke and cradle pockets, ensuring 100% axial tension alignment and eliminating lateral bolt fatigue bending loads.\u003c\/p\u003e\n\n\u003ch3\u003eExtreme Dynamic Cantilever Load Support\u003c\/h3\u003e\n\u003cp\u003eBicycle seatpost clamp hardware carries the full dynamic weight of the rider under continuous cantilever loading. Every road dip, trail root, and gravel bump translates into violent cyclic shock through the saddle rails. Manufactured from certified Aerospace Grade 5 Ti-6Al-4V titanium with a tensile strength exceeding 950–1050 MPa (matching Class 10.9 high-tensile steel), this kit eliminates the sudden catastrophic shearing risks associated with fatigue-compromised stock hardware.\u003c\/p\u003e\n\n\u003ch3\u003eSweat \u0026amp; Road Spray Corrosion Immunity\u003c\/h3\u003e\n\u003cp\u003ePositioned directly beneath the saddle and directly behind the rear tire, factory steel seatpost clamp bolts are notoriously plagued by rider sweat dripping down the seat tube and gritty road water spray. Factory bolts frequently rust solid, seize, or strip their hex drives during height adjustments. Certified titanium alloy forms a permanent ceramic-like passivating oxide layer that is 100% immune to perspiration acids, road salt, and harsh wash detergents.\u003c\/p\u003e\n\n\u003ch3\u003eWeight Optimization\u003c\/h3\u003e\n\u003cp\u003eAt approximately 6.5 grams per complete set (bolt + barrel nut + concave washer), this titanium hardware kit sheds roughly 50% of the weight of factory steel assemblies—saving grams at the highest point of the bicycle to improve out-of-the-saddle climbing dynamics.\u003c\/p\u003e\n\n\u003ch3\u003eBicycle Seatpost Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo-Bolt Micro-Adjust Seatposts:\u003c\/strong\u003e Direct replacement for Thomson Masterpiece \/ Elite, Specialized S-Works, Trek \/ Bontrager, Cannondale, Giant Contact, ENVE, Canyon, 3T, Ritchey, Deda, and aftermarket carbon seatposts utilizing M5 barrel nut clamp mechanisms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSaddle Rail Compatibility:\u003c\/strong\u003e Suitable for both standard 7mm round metal rails (titanium, hollow chromoly, stainless) and 7×9mm oval carbon fiber saddle rails.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications \u0026amp; Dimensions\u003c\/h3\u003e\n\u003cp\u003e\n  \u003cstrong\u003eMaterial:\u003c\/strong\u003e Certified Aerospace Ti-6Al-4V (TC4) Titanium Alloy, Grade 5\u003cbr\u003e\n  \u003cstrong\u003eThread Size:\u003c\/strong\u003e M5\u003cbr\u003e\n  \u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 0.8mm (Standard Metric Coarse)\u003cbr\u003e\n  \u003cstrong\u003eBolt Dimensions:\u003c\/strong\u003e Head Diameter 8.5mm, Head Height 5.0mm\u003cbr\u003e\n  \u003cstrong\u003eDrive Type:\u003c\/strong\u003e 4mm Allen Key \/ Internal Hex Drive\u003cbr\u003e\n  \u003cstrong\u003eBarrel Nut Dimensions:\u003c\/strong\u003e Length 16.0mm, Outer Diameter 8.5mm (Cross-drilled M5 threaded center)\u003cbr\u003e\n  \u003cstrong\u003eWasher Dimensions:\u003c\/strong\u003e 2.0mm Thickness, Spherical Concave Alignment Profile\u003cbr\u003e\n  \u003cstrong\u003eAvailable Bolt Lengths:\u003c\/strong\u003e 30mm, 35mm, 40mm\u003cbr\u003e\n  \u003cstrong\u003eTotal Weight:\u003c\/strong\u003e ~6.5g per set\u003cbr\u003e\n  \u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 × M5 Titanium Bolt, 1 × Titanium Barrel Nut, 1 × Titanium Concave Washer\u003cbr\u003e\n  \u003cstrong\u003eAvailable Finishes:\u003c\/strong\u003e Natural Titanium, PVD Vacuum-Coated Gold, Rainbow, Burn Blue, PVD Deep Black\n\u003c\/p\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Torque Guidelines\u003c\/h3\u003e\n\u003cp\u003eClean the seatpost yoke and cradle holes thoroughly. Apply a generous smear of anti-seize paste or synthetic grease to the bolt threads, barrel nut exterior, and concave washer surface to ensure smooth articulation and eliminate creaks. Alternately tighten front and rear clamp bolts in half-turn increments to set saddle tilt and fore\/aft position. Torque to 5.0–6.5 N·m (44–58 in-lb) using a calibrated manual torque wrench, taking care never to exceed the maximum torque stamped on your saddle rails or seatpost clamp. To learn more about selecting high-stress fasteners and avoiding common fatigue failures, read our \u003ca href=\"\/vi-vn\/blogs\/technical-resources\/the-ultimate-guide-to-choosing-titanium-bolts-for-your-application\"\u003eUltimate Guide to Choosing Titanium Fasteners\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePrice is for 1 complete set (1 Bolt + 1 Nut + 1 Washer). For seatposts requiring twin bolts, order quantity 2.\u003c\/em\u003e\u003c\/p\u003e","brand":"Tianswer","offers":[{"title":"Rainbow \/ M5x30mm","offer_id":45847214719233,"sku":"TS-M5-SPT-30-RB","price":6.77,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M5x35mm","offer_id":45847292412161,"sku":"TS-M5-SPT-35-RB","price":6.8,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M5x40mm","offer_id":45847292444929,"sku":"TS-M5-SPT-40-RB","price":6.88,"currency_code":"USD","in_stock":true},{"title":"Titanium \/ M5x30mm","offer_id":45847214653697,"sku":"TS-M5-SPT-30-TI","price":6.28,"currency_code":"USD","in_stock":true},{"title":"Titanium \/ M5x35mm","offer_id":45847292281089,"sku":"TS-M5-SPT-35-TI","price":6.37,"currency_code":"USD","in_stock":true},{"title":"Titanium \/ M5x40mm","offer_id":45847292313857,"sku":"TS-M5-SPT-40-TI","price":6.39,"currency_code":"USD","in_stock":true},{"title":"Gold \/ M5x30mm","offer_id":45847214686465,"sku":"TS-M5-SPT-30-GD","price":6.77,"currency_code":"USD","in_stock":true},{"title":"Gold \/ M5x35mm","offer_id":45847292346625,"sku":"TS-M5-SPT-35-GD","price":6.8,"currency_code":"USD","in_stock":true},{"title":"Gold \/ M5x40mm","offer_id":45847292379393,"sku":"TS-M5-SPT-40-GD","price":6.88,"currency_code":"USD","in_stock":true},{"title":"Burn Blue \/ M5x30mm","offer_id":45847214752001,"sku":"TS-M5-SPT-30-BB","price":6.77,"currency_code":"USD","in_stock":true},{"title":"Burn Blue \/ M5x35mm","offer_id":45847292477697,"sku":"TS-M5-SPT-35-BB","price":6.8,"currency_code":"USD","in_stock":true},{"title":"Burn Blue \/ M5x40mm","offer_id":45847292510465,"sku":"TS-M5-SPT-40-BB","price":6.88,"currency_code":"USD","in_stock":true},{"title":"Black \/ M5x30mm","offer_id":45847214784769,"sku":"TS-M5-SPT-30-BK","price":6.77,"currency_code":"USD","in_stock":true},{"title":"Black \/ M5x35mm","offer_id":45847292543233,"sku":"TS-M5-SPT-35-BK","price":6.8,"currency_code":"USD","in_stock":true},{"title":"Black \/ M5x40mm","offer_id":45847292576001,"sku":"TS-M5-SPT-40-BK","price":6.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/1740\/3393\/files\/M5x35_-4.jpg?v=1744558432","url":"https:\/\/tianswer.com\/vi-vn\/products\/titanium-bolt-m5x30-35-40mm-bicycle-seatpost-screw-for-bicycle-replacement-parts-pitch-0-8mm-1-set-by-tianswer","provider":"Tianswer","version":"1.0","type":"link"}