--- product_id: 740543286 title: "TRIWONDER Bike Stem 25.4 31.8mm Short Bicycle Handlebar Stem 38 45mm Aluminum Alloy for Mountain Road Bike MTB BMX" brand: "triwonder" price: "¥4934" currency: JPY in_stock: true reviews_count: 13 url: https://www.desertcart.jp/products/740543286-triwonder-bike-stem-25-4-31-8mm-short-bicycle-handlebar store_origin: JP region: Japan --- # 4-bolt secure bar clamp Dual clamp sizes 25.4/31.8mm High-strength lightweight aluminum TRIWONDER Bike Stem 25.4 31.8mm Short Bicycle Handlebar Stem 38 45mm Aluminum Alloy for Mountain Road Bike MTB BMX **Brand:** triwonder **Price:** ¥4934 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Ride Steady, Ride Bold: The Stem That Holds You Together ## Quick Answers - **What is this?** TRIWONDER Bike Stem 25.4 31.8mm Short Bicycle Handlebar Stem 38 45mm Aluminum Alloy for Mountain Road Bike MTB BMX by triwonder - **How much does it cost?** ¥4934 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/740543286-triwonder-bike-stem-25-4-31-8mm-short-bicycle-handlebar) ## Best For - triwonder enthusiasts ## Why This Product - Trusted triwonder brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Unmatched Durability:** Crafted from premium aluminum alloy to resist fatigue and keep your ride smooth and controlled. - • **Precision Fit for Every Ride:** Choose between 25.4mm or 31.8mm handlebar clamps for a perfect, wobble-free connection. - • **Steady Control, Every Terrain:** Reduces handlebar tilt for enhanced stability and responsive steering on mountain, road, or BMX bikes. - • **Versatility Meets Performance:** Engineered to fit multiple bike types—MTB, road, BMX, and downhill—so you never miss a ride. - • **Quick & Rock-Solid Installation:** 4-bolt clamp design locks your handlebars in place, eliminating slippage even on the roughest trails. ## Overview The TRIWONDER Bike Stem offers a secure fit for handlebars sized 25.4mm or 31.8mm and a standard 28.6mm steerer tube. Made from high-strength aluminum alloy, it delivers durability without added weight. Its 4-bolt clamp ensures a wobble-free, stable connection, enhancing control and responsiveness across mountain, road, BMX, and downhill bikes. ## Description This bicycle stem is available in two clamp sizes, compatible with handlebars of either 25.4mm or 31.8mm in diameter. Both versions fit a standard 28.6mm steerer tube. The four-bolt clamp design ensures a rigid, wobble-free connection that prevents flexing and handlebar slippage. How to Measure Your Handlebar Diameter: ## Features - Size: Compatible with handlebars of 25.4mm or 31.8mm (choose your size) and a 28.6mm (1-1/8") steerer tube, ensures a secure fit for most bikes - Strong: Made from high-strength aluminium alloy, this stem offers durability and fatigue resistance without adding unnecessary weight, giving you better control while riding - Improved Stability: Reduces handlebar tilt for smoother steering and enhances bike handling, making rides more stable and responsive - Quick Installation: Features a 4-bolt bar clamp for a solid, wobble-free hold, preventing slippage even on rough terrain - Versatile for Multiple Bike Types: The handlebar stem riser is suitable for road bikes, mountain bikes (MTB), BMX, downhill (DH), and more ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0F4CQS62J | | Best Sellers Rank | 18,484 in Sports & Outdoors (See Top 100 in Sports & Outdoors) 18 in Cycling Stems | | Bike Type | Mountain Bike, Road Bike | | Brand Name | TRIWONDER | | Colour | 01 Black - 25.4 x 45mm | | Country Of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (1,582) 4.3 out of 5 stars | | Item Dimensions L X W | 45L x 25W millimetres | | Manufacturer | TRIWONDER | | Manufacturer Part Number | OS0944 | | Material Type | Aluminium | | Model Number | OS0944 | ## Product Details - **Colour:** 01 Black - 25.4 x 45mm - **Brand:** TRIWONDER - **Material:** Aluminium - **Product dimensions:** 45L x 25W millimetres - **Manufacturer:** TRIWONDER ## Images ![TRIWONDER Bike Stem 25.4 31.8mm Short Bicycle Handlebar Stem 38 45mm Aluminum Alloy for Mountain Road Bike MTB BMX - Image 1](https://m.media-amazon.com/images/I/61rFKHfCC-L.jpg) ## Available Options This product comes in different **Colour Name** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great item *by on Reviewed in the United Kingdom 17 March 2026* Great item very light works well although needed a shim to the bars but looks great ### ⭐⭐⭐⭐⭐ Good *by on Reviewed in the United Kingdom 3 October 2025* Works as it should, a little bit thinner than the bike's original requirements a spacer. ### ⭐⭐⭐⭐ Suitable replacement *by on Reviewed in the United Kingdom 5 September 2024* Easy to fit replacement, no longer hunching forward --- ## 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/740543286-triwonder-bike-stem-25-4-31-8mm-short-bicycle-handlebar](https://www.desertcart.jp/products/740543286-triwonder-bike-stem-25-4-31-8mm-short-bicycle-handlebar) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-15*