--- product_id: 415051027 title: "1Pair Bike Handlebar Shim Bicycle Handlebar Stem Shim Handle Bar Adapter Reducer Aluminum Alloy Clamp Spacer Conversion Shims 25.4 to 31.8MM Cycling Parts Components" brand: "saipor" price: "$16.97" currency: USD in_stock: true reviews_count: 8 category: "Saipor" url: https://www.desertcart.us/products/415051027-1pair-bike-handlebar-shim-bicycle-handlebar-stem-shim-handle-bar store_origin: US region: United States of America --- # Lightweight & corrosion-resistant Anti-slip wavy surface design High-strength aluminum alloy 1Pair Bike Handlebar Shim Bicycle Handlebar Stem Shim Handle Bar Adapter Reducer Aluminum Alloy Clamp Spacer Conversion Shims 25.4 to 31.8MM Cycling Parts Components **Brand:** saipor **Price:** $16.97 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride with precision and style — don’t get left behind! ## Quick Answers - **What is this?** 1Pair Bike Handlebar Shim Bicycle Handlebar Stem Shim Handle Bar Adapter Reducer Aluminum Alloy Clamp Spacer Conversion Shims 25.4 to 31.8MM Cycling Parts Components by saipor - **How much does it cost?** $16.97 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/415051027-1pair-bike-handlebar-shim-bicycle-handlebar-stem-shim-handle-bar) ## Best For - saipor enthusiasts ## Why This Product - Trusted saipor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleek CNC Finish:** Anodized with vibrant colors and smooth edges for a stylish, modern bike upgrade. - • **Enhanced Grip Design:** Innovative wavy surface boosts friction, ensuring safer, slip-free rides. - • **Durable Aluminum Alloy:** Crafted from corrosion-resistant, lightweight aluminum for long-lasting performance. - • **Effortless Installation:** Quick, tool-free setup lets you hit the road faster without hassle. - • **Precision Fit Conversion:** Seamlessly adapts 25.4mm handlebars to 31.8mm stems for ultimate compatibility. ## Overview This 1Pair Bike Handlebar Shim is a high-strength aluminum alloy adapter that converts 25.4mm handlebars to fit 31.8mm stems. Featuring a unique wavy anti-slip design and anodized CNC finish, it offers durable, lightweight performance with easy installation—perfect for cyclists seeking a sleek, secure upgrade. ## Description Apply to:If your handlebar diameter is 25.4mm and the stem diameter is 31.8mm, then you can use "25.4 to 31.8MM" handlebar shim as a conversion.Description:1. Forged From High-Strength Aluminum Alloy, High Strength And Corrosion Resistance2. The product adopts corrugated design for better anti-skid3. This reducer allows you to use standard size handlebars of smaller diameter on a large shank.4. Great replacement gear accessories for bike cycling enthusiasts.Specification:Material: Aluminum alloySpecifications: 25.4 to 31.8mmColor: BlackQuantity: 1pairPackage includes:1pair x Bike Handlebar Conversion Shim Review: Works - Did what it should, works fine. Review: Quick delivery. - Perfect , did what it was supposed to do and allowed new handlebars to be fitted ## Features - 【Material】Made of aluminium alloy material, very lightweight, not easy to rust or fade, corrosion resistant and durable. - 【Wavy Design】The wavy design on the surface not only does not damage the handlebars and stems, but also increases the friction of the product. Increase riding safety protection. - 【Styling】CNC cutting with smooth surface and edges; the surface is anodized with bright colors and luster, making your bike more cool and fashion. - 【Easy to install】Installation is simple and quick, directly buckled in the handlebar installation position. - 【Application】 This reducer allows you to use smaller diameter standard size handlebars in an oversize stem. If your handlebar diameter is 25.4mm and the stem diameter is 31.8mm, then you can use "25.4 to 31.8MM" handlebar shim as a conversion. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09TD98F2Y | | Best Sellers Rank | 20,484 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 20 in Cycling Stems | | Brand Name | Saipor | | Colour | Black | | Country Of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (100) | | Item Weight | 0.02 Kilograms | | Manufacturer | Saipor | | Material Type | Aluminium | | Unit Count | 1 count | ## Product Details - **Brand:** Saipor - **Colour:** Black - **Item weight:** 0.02 Kilograms - **Manufacturer:** Saipor - **Material:** Aluminium ## Images ![1Pair Bike Handlebar Shim Bicycle Handlebar Stem Shim Handle Bar Adapter Reducer Aluminum Alloy Clamp Spacer Conversion Shims 25.4 to 31.8MM Cycling Parts Components - Image 1](https://m.media-amazon.com/images/I/61NVMKJ3Z2L.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works *by K***R on 5 August 2025* Did what it should, works fine. ### ⭐⭐⭐⭐⭐ Quick delivery. *by J***E on 8 April 2025* Perfect , did what it was supposed to do and allowed new handlebars to be fitted ### ⭐⭐⭐⭐ Great once clamped tight, but can be tricky until Stem clamp tightened *by Q***R on 16 October 2025* Worked great, but was tricky to hold together on handlebar until Stem clamp fitted and tightened, maybe some stickiness or other method to hold it on/together could be have been included. ## Frequently Bought Together - Saipor 1Pair Bike Handlebar Shim Bicycle Handlebar Stem Shim Handle Bar Adapter Reducer Aluminum Alloy Clamp Spacer Conversion Shims 25.4 to 31.8MM Cycling Parts Components - GoHZQ 6 Pcs Headset Spacers 1 1/8", Aluminium Alloy Headset Spacers for Bikes, 28.6mm MTB Road Bike Stem Spacers 2mm/3mm/5mm/3x10mm Black - JUPSK 31.8mm Bike Stem, Cycling Bike Stem Short Handlebar Stem Lightweight MTB Stem for Most Bicycle Road Bike BMX MTB --- ## 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.us/products/415051027-1pair-bike-handlebar-shim-bicycle-handlebar-stem-shim-handle-bar](https://www.desertcart.us/products/415051027-1pair-bike-handlebar-shim-bicycle-handlebar-stem-shim-handle-bar) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-27*