--- product_id: 331038926 title: "Topbuti Bike Seat Post 25.4/27.2/28.6 x 350 mm Aluminum Alloy Bicycle Seatpost for Mountain MTB Road Bike Fixed Gear Bike Seatpost" brand: "topbuti" price: "FREE" currency: JPY in_stock: false url: https://www.desertcart.jp/products/331038926-topbuti-bike-seat-post-25-4-27-2-28-6 store_origin: JP region: Japan --- # Fits 25.4mm diameter frames precisely 350mm length for versatile fit 2mm thick durable aluminum alloy Topbuti Bike Seat Post 25.4/27.2/28.6 x 350 mm Aluminum Alloy Bicycle Seatpost for Mountain MTB Road Bike Fixed Gear Bike Seatpost **Brand:** topbuti **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > 🚴‍♂️ Upgrade your ride with precision and style—because your bike deserves the best! ## Quick Answers - **What is this?** Topbuti Bike Seat Post 25.4/27.2/28.6 x 350 mm Aluminum Alloy Bicycle Seatpost for Mountain MTB Road Bike Fixed Gear Bike Seatpost by topbuti - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/331038926-topbuti-bike-seat-post-25-4-27-2-28-6) ## Best For - topbuti enthusiasts ## Why This Product - Trusted topbuti brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation:** Swap your old seatpost in minutes with a simple unbolt and secure process—no mechanic needed. - • **Universal Compatibility:** Perfect for mountain, road, and fixed gear bikes, making it the go-to upgrade for any cycling enthusiast. - • **Sleek Matte Black Finish:** Elevate your bike’s style with a modern, stealthy look that stands out on every trail and street. - • **Lightweight Yet Rock-Solid:** Crafted from premium aluminum alloy with a 2mm thickness, balancing strength and weight for peak performance. - • **Precision Fit for Every Ride:** Designed to match your bike’s exact 25.4mm diameter for a seamless upgrade without guesswork. ## Overview This 350mm aluminum alloy bike seatpost offers a durable, lightweight upgrade compatible with 25.4mm diameter bike frames. Engineered for mountain, road, and fixed gear bikes, it features a 2mm thick tube for enhanced load-bearing strength and a sleek black finish. Easy to install and designed for a perfect fit, it’s the essential component for riders seeking comfort and performance without compromise. ## Description Bike Seat Post Length 350mm 25.4mm Black Aluminum Alloy Bicycle Seat Post Note: 1. Please measure and check the actual required diameter before purchasing, This seatpost Size is 350mm 25.4mm. 2. Package include only 1 piece Bicycle Seat Post, NOT include the saddle clamp. 3. Manual measurement. please allow a little size error.Specification: Quantity: 1 piece bike seat post Material: aluminum alloy Diameter: 25.4 mm Length:350 mm Thickness: 2 mm Color: black Package Include: 1 x Bike Seatpost How to Choose the Size: 1.Check the diameter of the original seatpost, then choose the same size as your original one. 2.Measure the inner diameter of the frame tube, choose the right size new seat post. ## Features - Please Pay Attention: Please do measure and confirm the actual required diameter you need before purchasing, otherwise you will find it too small or too big for your bike and waste your time to return it. Saddle clamp is NOT included. - Bike Seat Post Size: Length: 350mm/ 13.8 inch, Outer Diameter 25.4mm / 1 inch, Thickness of the tube: 2mm/ 0.08 inch, Color: black. - Material: The bicycle seat tube saddle pole is made of aluminum alloy, durable and stronger inside design will improve the load-bearing of seat post. - Easy to Install: Unbolt the old seat and remove bicycle seat post, then secure the seat bolt to the new bicycle seatpost and attaching it to the bike frame. Note: There is a safe line mark on the seat post. Please insert at least above the MINI INSERTION line. - Widely Use: The saddle pole bike seatpost seat tube is suitable for most old style bike, and the bike saddle with clamp, mountain bike, road bike, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08YY5TX8H | | Best Sellers Rank | #79,771 in Sporting Goods ( See Top 100 in Sporting Goods ) #54 in Bike Seat Posts | | Bike Type | Mountain Bike | | Brand Name | Topbuti | | Color | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (476) | | Item Diameter | 25.4 Millimeters | | Item Dimensions W x H | 25W x 351H millimeters | | Item Weight | 0.16 Kilograms | | Manufacturer | Topbuti | | Manufacturer Part Number | BS-1 | | Material Type | Aluminum | | Model Number | BS-1 | | Number of Items | 1 | | Unit Count | 1 Count | ## Product Details - **Brand:** Topbuti - **Colour:** Black - **Item weight:** 0.16 Kilograms - **Material:** Aluminum - **Product dimensions:** 25W x 351H millimeters ## Images ![Topbuti Bike Seat Post 25.4/27.2/28.6 x 350 mm Aluminum Alloy Bicycle Seatpost for Mountain MTB Road Bike Fixed Gear Bike Seatpost - Image 1](https://m.media-amazon.com/images/I/615XXbTKd0L.jpg) ## Frequently Bought Together - Topbuti Bike Seat Post 25.4/27.2/28.6 x 350 mm Aluminum Alloy Bicycle Seatpost for Mountain MTB Road Bike Fixed Gear Bike Seatpost - Comfortable Seat Cushion for Men Women with Dual Shock Absorbing Ball Memory Foam Waterproof Wide Bicycle Saddle Fit for Road Bikes - ROCKBROS Bike Seat Comfort Bike Saddle Mountain Bicycle Accessories for Men Women Soft Wide Bike Seat Cushion Dual Shock Absorbing with Reflective Strip --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/331038926-topbuti-bike-seat-post-25-4-27-2-28-6](https://www.desertcart.jp/products/331038926-topbuti-bike-seat-post-25-4-27-2-28-6) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-11*