--- product_id: 231405744 title: "TRIWONDER Bike Stem 25.4 31.8 Adjustable 90/110/130/145mm Bike Handlebar Extender Stem Riser Bicycle Handle Bar Extensions for Mountain Bike, Road Bike, MTB, BMX, Cycling" brand: "triwonder" price: "£29.24" currency: GBP in_stock: true reviews_count: 13 category: "Triwonder" url: https://www.desertcart.co.uk/products/231405744-triwonder-bike-stem-25-4-31-8-adjustable-90-110 store_origin: GB region: United Kingdom --- # Adjustable length 90-145mm 4-bolt secure clamp 0-60° angle customization TRIWONDER Bike Stem 25.4 31.8 Adjustable 90/110/130/145mm Bike Handlebar Extender Stem Riser Bicycle Handle Bar Extensions for Mountain Bike, Road Bike, MTB, BMX, Cycling **Brand:** triwonder **Price:** £29.24 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Elevate your ride, own every mile! ## Quick Answers - **What is this?** TRIWONDER Bike Stem 25.4 31.8 Adjustable 90/110/130/145mm Bike Handlebar Extender Stem Riser Bicycle Handle Bar Extensions for Mountain Bike, Road Bike, MTB, BMX, Cycling by triwonder - **How much does it cost?** £29.24 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/231405744-triwonder-bike-stem-25-4-31-8-adjustable-90-110) ## 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 - • **Rock-Solid Stability:** 4-bolt clamp design ensures zero slippage, giving you confidence on every trail and road sprint. - • **Ride Pain-Free, Longer:** Ergonomic riser design relieves back, neck, and wrist strain—because your comfort should never be compromised. - • **Lightweight Yet Durable:** Crafted from high-strength 3D forged AL6061 T6 aluminum alloy for long-lasting performance without the bulk. - • **Precision Fit for Every Ride:** Fits 31.8mm handlebars & 28.6mm steerer tubes for versatile compatibility across MTB, road, and BMX bikes. - • **Customizable Comfort On-the-Fly:** Adjust handlebar angle from 0° to 60° without removing the stem, dialing in your perfect riding posture instantly. ## Overview The TRIWONDER Bike Stem is a premium adjustable handlebar extender designed for mountain, road, and BMX bikes. Featuring a durable 3D forged aluminum build, it fits standard 31.8mm handlebars and 28.6mm steerer tubes. With lengths from 90 to 145mm and a 0-60° adjustable angle, it offers customizable comfort and improved riding posture. The secure 4-bolt clamp guarantees stability, making it a top choice for riders seeking enhanced control and pain-free cycling. ## Description Product description MORE STYLES Bike Stem Riser Adjustable Bike Stem Bike Handlebar Extender Material Aluminum alloy AL6061 T6 Length Increase 85 - 145mm 90/110/120/130mm 60/70/80/90/100/110mm Handlebar Diameter 31.8mm; 25.4mm 31.8mm Front Fork Stem Diameter 1-1/8'' (28.6mm) SPECIFICATIONS ## Features - Size: Fits 31.8mm (1-1/4") handlebars and 28.6mm (1-1/8") steerer tube. Available in 90 / 110 / 120mm lengths (measured center to center, not total stem length), with 0–60° adjustable angle - Easy Height Adjustment: Easily adjust the handlebar angle without removing the bike stem, perfect for riders who want to fine-tune their position for better posture, visibility, and control - Easy To Install: Includes clear specs, an angle indicator, and all the tools you need. The 4-bolt clamp securely locks your handlebars in place—no slipping, no fuss - Ride Longer In Comfort: Whether you're commuting or touring, this bike handlebar extender helps relieve back, neck, and wrist discomfort by letting you ride in a natural position. Perfect for riders dealing with shoulder or back pain - Built Strong For Everyday Use: Crafted from high-strength 3D forged alloy for durability and control, this stem stands up to road bikes, MTBs, BMX, and more—durable, dependable, and budget-friendly ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08F7Q3WXL | | Best Sellers Rank | #14,761 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6 in Bike Stems | | Bike Type | Road Bike | | Brand | TRIWONDER | | Brand Name | TRIWONDER | | Color | 01 Black - Fit 31.8mm Handlebar | | Customer Reviews | 4.6 out of 5 stars 3,386 Reviews | | Item Dimensions L x W | 4.72"L x 1"W | | Item Weight | 0.34 Kilograms | | Manufacturer | TRIWONDER | | Manufacturer Part Number | OS0908 | | Material | Aluminum | | Material Type | Aluminum | | Model Number | OS0908 | | Product Dimensions | 4.72"L x 1"W | ## Images ![TRIWONDER Bike Stem 25.4 31.8 Adjustable 90/110/130/145mm Bike Handlebar Extender Stem Riser Bicycle Handle Bar Extensions for Mountain Bike, Road Bike, MTB, BMX, Cycling - Image 1](https://m.media-amazon.com/images/I/61nP6DbeeKL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***L on April 7, 2026* ### ⭐⭐⭐⭐⭐ Review *by D***C on September 6, 2025* ### ⭐⭐⭐⭐⭐ Review *by T***S on March 4, 2026* ## Frequently Bought Together - TRIWONDER Bike Stem 25.4 31.8 Adjustable 60 Degree 90mm 110mm 130mm Bike Handlebar Extender Stem Riser Bicycle Handle Bar Extensions for Mountain Bike, Road Bike, MTB, BMX, Cycling - Bike Stem Riser Wake Bike Fork Stem Extender Bicycle Handlebar Raiser Head Up Adapter Suitable for Mountain Bike, Road Bike, MTB, BMX (Aluminium Alloy, Adjustable, Black) - Comfortable Seat Cushion for Men Women with Dual Shock Absorbing Ball Memory Foam Waterproof Wide Bicycle Saddle Fit for Road Bikes --- ## 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.co.uk/products/231405744-triwonder-bike-stem-25-4-31-8-adjustable-90-110](https://www.desertcart.co.uk/products/231405744-triwonder-bike-stem-25-4-31-8-adjustable-90-110) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-17*