--- product_id: 287612264 title: "RSX Mountain Bike Direct Mount Stem with 31.8mm Handlebar Clamp, 2 Piece Lightweight Split Design for Dual Crown Forks, Adjustable Extension from 45-50mm with 30mm Rise (Black)" brand: "funn" price: "€ 169.39" currency: EUR in_stock: true reviews_count: 5 category: "Funn" url: https://www.desertcart.gr/products/287612264-rsx-mountain-bike-direct-mount-stem-with-31-8mm-handlebar store_origin: GR region: Greece --- # Adjustable extension: 45-50mm length with 30mm rise CNC machined aerospace-grade 6061 aluminum Direct mount design for dual crown forks RSX Mountain Bike Direct Mount Stem with 31.8mm Handlebar Clamp, 2 Piece Lightweight Split Design for Dual Crown Forks, Adjustable Extension from 45-50mm with 30mm Rise (Black) **Brand:** funn **Price:** € 169.39 **Availability:** βœ… In Stock ## Summary > πŸš΅β€β™‚οΈ Elevate your ride with precision and style β€” the RSX Stem means business! ## Quick Answers - **What is this?** RSX Mountain Bike Direct Mount Stem with 31.8mm Handlebar Clamp, 2 Piece Lightweight Split Design for Dual Crown Forks, Adjustable Extension from 45-50mm with 30mm Rise (Black) by funn - **How much does it cost?** € 169.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/287612264-rsx-mountain-bike-direct-mount-stem-with-31-8mm-handlebar) ## Best For - funn enthusiasts ## Why This Product - Trusted funn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Effortless Upgrade:** Direct bolt-on replacement for 31.8mm handlebars, making installation quick and hassle-freeβ€”ride ready in minutes. - β€’ **Sleek Minimalist Design:** Two-piece split design combines rugged functionality with a clean, modern aesthetic that turns heads on every ride. - β€’ **Dual Crown Compatibility:** Specifically designed for dual crown forks, ensuring rock-solid stability on the toughest downhill trails. - β€’ **Precision Engineered Strength:** Crafted from aerospace-grade 6061 aluminum for unbeatable durability without the weight penalty. - β€’ **Tailored Fit for Peak Performance:** Adjustable extension lets you dial in your perfect 45-50mm reach with a 30mm rise for ultimate control. ## Overview The RSX Mountain Bike Direct Mount Stem is a lightweight, CNC-machined 6061 aerospace aluminum component designed for dual crown forks and 31.8mm handlebars. Featuring an adjustable extension from 45 to 50mm with a 30mm rise, it offers customizable fit and superior rigidity for downhill and off-road biking. Its two-piece split design ensures easy installation and a sleek look, making it a top-tier upgrade for serious riders seeking performance and style. ## Description Discover the RSX Direct Mount Stem - the ultimate component for your off-road or downhill bike. Specially designed for use with double crown forks, this bike stem is a must have for cyclists looking to improve their performance. Precisely manufactured using CNC manufacturing techniques and 6061 aerospace alloy, the RSX stem is both robust and lightweight, making it perfect for the demands of off-road and downhill driving. It offers an integrated adjustment for a custom fit, with lengths of 45mm and 50mm and 20mm and 30mm available. If you want to improve the stem of your Sur Ron X bike, choosing the model with a handlebar diameter of 31.8mm and a 30mm rise can be a good option to customize the fit and handling of your Sur-Ron bike. But it's not just about functionality - the RSX Mountain Bike Direct Mount Stem is also a beauty object. The simple and simple design is both aesthetic and durable enough to handle the toughest paths. And with a wide range of colours, you can find the perfect combination for the style of your bike. So why wait? Improve your riding with the RSX Mountain Bike Stem and experience the unmatched performance and durability of this premium component. You will be proud to show it on every outing Review: Buena calidad - Se sienten de calidad, incluyen todos los tornillos. Review: Worked out perfectly - Bought this to replace the stock stem on my Sur-Ron X electric dirt bike. The stock one kept twisting when the bike went down out on the trails. (It happens) It was easy to remove the stock one and replace it with this one. Great fit and finish. Seems well made and looks good. I bought the one with the 30mm rise so it would keep about the same height I had with the stock one and a Protaper Handlebar with the 3" Rise that I had previously installed. It also didn't interfere with the Sur-Ron headlight. ## Features - Make sure the RSX fits correctly: the RSX is available for handlebars with a diameter of 31.8 mm or 35 mm. This version is for 31.8mm only. Please check your handlebar before purchase and make sure you order the correct version. - The RSX Direct Mount Stem is specifically designed for use with a Dual Crown fork, making it an excellent choice for those who need a stem for their off-road or downhill bike. - The RSX bike stem is precision CNC machined from aerospace grade 6061 alloy to provide plenty of support and rigidity while keeping the weight as low as possible. - ADJUSTABLE EXTENSION This is a beautifully simple but brutally robust bike component with integrated adjustment, offering lengths of 45mm and 50mm with a 20mm and 30mm raise. - Choose the model RSX Direct Mount Stem with 31.8mm handlebar bore and 30mm rise for a reliable and stylish upgrade for your Sur Ron bike. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076PK7KRP | | Best Sellers Rank | #28,967 in Sporting Goods ( See Top 100 in Sporting Goods ) #21 in Bike Stems | | Brand | Funn | | Brand Name | Funn | | Color | Black | | Colour | Black | | Customer Reviews | 4.8 out of 5 stars 88 Reviews | | Global Trade Identification Number | 04712931183733 | | Included Components | Systems RSX+30Β° 31.8 x 45-5 mm, black | | Item Dimensions | 10 x 10 x 10 centimeters | | Item Type Name | Systems RSX+30Β° 31.8 x 45-5 mm, black | | Item Weight | 0.24 Kilograms | | Item dimensions L x W x H | 10 x 10 x 10 centimeters | | Item weight | 0.24 Kilograms | | Manufacturer | FUNN | | Manufacturer Part Number | 4712931183733 | | Material | Aluminum | | Material Type | Aluminum | | Model Number | 4712931183733 | | Set Name | RSX file | | Style | bar clamp | | Style Name | bar clamp | | Tensile Strength | 310 Megapascals | | Unit Count | 1 Count | ## Product Details - **Brand:** Funn - **Colour:** Black - **Item dimensions L x W x H:** 10 x 10 x 10 centimeters - **Material:** Aluminum - **Style:** bar clamp ## Images ![RSX Mountain Bike Direct Mount Stem with 31.8mm Handlebar Clamp, 2 Piece Lightweight Split Design for Dual Crown Forks, Adjustable Extension from 45-50mm with 30mm Rise (Black) - Image 1](https://m.media-amazon.com/images/I/61txEjiJQ2L.jpg) ## Questions & Answers **Q: What size are the bolts?** A: The bolt is M6 with 20mm thread section with 1mm washer. **Q: Does it come with bolts?** A: Yes. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Buena calidad *by D***0 on 14 March 2026* Se sienten de calidad, incluyen todos los tornillos. ### ⭐⭐⭐⭐⭐ Worked out perfectly *by A***1 on 17 November 2020* Bought this to replace the stock stem on my Sur-Ron X electric dirt bike. The stock one kept twisting when the bike went down out on the trails. (It happens) It was easy to remove the stock one and replace it with this one. Great fit and finish. Seems well made and looks good. I bought the one with the 30mm rise so it would keep about the same height I had with the stock one and a Protaper Handlebar with the 3" Rise that I had previously installed. It also didn't interfere with the Sur-Ron headlight. ### ⭐⭐⭐⭐⭐ Modelo Correcto para Surron *by P***E on 2 April 2023* Este es el modelo correcto para Surron 2023 y para versiones anteriores ## Frequently Bought Together - Funn RSX Mountain Bike Direct Mount Bike Stem with 31.8mm Bar Clamp, 2 Pieces Lightweight Split Design for Dual Crown Forks, Adjustable Extension 45-50mm - Sumind 11 Pieces Bike Carbon Fiber Headset Spacer Bicycle 1-1/8 Inch 20 15 10 5 3 2 1 mm, 7 Size - Renthal, FatBar Lite V2 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/287612264-rsx-mountain-bike-direct-mount-stem-with-31-8mm-handlebar](https://www.desertcart.gr/products/287612264-rsx-mountain-bike-direct-mount-stem-with-31-8mm-handlebar) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-31*