Why the XT-A037 Stem Opts for M6 Bolts Over the Industry-Standard M5? 🏭 LUNJE Factory: Committed to Rider Safety 1. Maximum Clamping Force for DH, Enduro, and E-MTB Safety 2, High Durability & Fatigue Resistance (Built to Last) 3, Zero Bolt Stripping (M6 Precision Engineering) 4, Over-Engineered for Heavy-Duty Performance Technical Specifications ：💎 ✓ Model: LUNJE XT-A037 (New models for sale now) ✓ Material: Full CNC Machined 6061-T6 Aluminum Alloy ✓ Length: 35mm (Short reach for snappier handling) ✓ Handlebar Clamp Diameter: 31.8mm （Ideal upgrade for 31.8mm handlebars） ✓ Steer Tube Diameter: 28.6mm (1-1/8") ✓ Angle: 0° Degree (sharpens up the handling) ✓ Weight: Approx. 160g (Optimized Strength-to-Weight Ratio) ✓ Finish: Anodized Scratch-Resistant Surface (clean, race-ready look)
XT-A032 🚴 35mm Ultra-Short Innovative Stem lightweight hollow structure Ultimate Control Precision 5-axis CNC machined 3D dynamic tiger stripe reduces wind resistance multi-angle refraction upgrade anodization bike industrial aesthetics for MTB DH BMX & Enduro; 🚴Key Innovations: ▸ 35mm ultra-short center (instant steering response), ▸ 5-axis CNC machined from T6 aluminum, ▸ Patent-pending 3D tiger stripe aerodynamics, ▸ Military-grade gradient anodization, ▸ 150g optimized hollow design, 🚴Performance Benefits: ✓ 18% faster steering input， ✓ 15% reduced wind resistance， ✓ 800HV surface hardness， ✓ UCI-certified for pro racing， 🚴Built For Champions In: • Downhill • Enduro • BMX • Technical Trail. 🔥 Why Choose LUNJE? 🚴🏼♀Designed for riders who demand instant response and unshakable control on technical trails. 🛠Perfect for OEM brands seeking high-performance, customizable stems with a rugged aesthetic. 🏭 OEM/ODM Solutions: ✓ Multiple lengths & clamp sizes ✓ Custom laser engraving ✓ Bulk pricing for brands, ✓ Rigorous QC testing for impact & fatigue resistance, 📩 Get Your Custom Quote Today! 📧 Email: georgechen@koofbicycle.com 📱 WhatsApp: +86 13798419681 🌐 Website: https://en.koofbike.com/Product_detail/43.html 💬 "Already using our stem ? Share your experience below!" 🚴 Tag us in your setup—we love seeing LUNJE parts in action! 🏷️ Trending Hashtags: #MTBStem #ShortStem #LUNJEStem #OEMSupplier
XT-A829 🏆 3D Forged Suspension Stem Factory (SGS Certified) 💎 Technical Specifications: 🆔 Model: LUNJE® XT-A829 (Suspension Bike Stem Series) 🛡️ Material: 3D Forged 6061-T6 Aluminum Bike Parts (High Strength) ⚙️ Tech: Smart Shock Absorber (Soft/Hard Spring Options) 📏 Length: 60/70/80/90/100/110mm Options ⭕ Clamp: 31.8mm (Standard Aluminium Bicycle Handlebars Fit) 📐 Adjustment: Adjustable Bike Stem OEM (0-60° Customizable Rise) 🍴 Steerer: 28.6mm (1-1/8") Universal Compatibility 🎨 Finish: Black/Purple Anodized (Bicycle Parts Custom Logo Available) ✅ Performance: Absorbs 30% Trail Vibrations / 45% Fatigue Reduction 📜 Compliance: SGS Certified & ISO 4210 Bike Stem Compliant Direct Factory Quotes & OEM/ODM Support: 📧 E-mail: lunje.bicycle@gmail.com 📱 WhatsApp: +86 13798419681
LUNJE® CNC Bike Stem Factory - SGS Certified A015B Aluminum MTB Stem OEM
XT-A015B 🏆 Professional CNC Bike Stem Factory (SGS Certified) 💎 Technical Specifications: 🆔 Model: LUNJE® XT-A015B (CNC Bike Stem Series) 🛡️ Material: High-Strength 6061 Aluminum Bike Parts ⚙️ Process: Full 5-Axis CNC Machined & Hollow-Out Design 📏 Extension: 35mm (Optimized for Enduro/Trail Control) ⭕ Clamp: 31.8mm (Standard Aluminium Bicycle Handlebars Fit) 📐 Geometry: 0° Rise | 28.6mm Steerer | 42mm Stack Height ⚖️ Weight: Approx. 124g (Ultra-Lightweight Performance) 🎨 Finish: 10 Anodized Colors (Oil-Slick/Gradient Available) ✅ Service: OEM MTB Parts & Bicycle Parts Custom Logo Specialist 📜 Compliance: SGS Certified Bike Parts & ISO 4210 Compliant Direct Factory Quotes & OEM Support: 📧 E-mail: lunje.bicycle@gmail.com 📱 WhatsApp: +86-137-9841-9681
Factory Direct MTB Bicycle Stem 25.4mm/31.8mm | Ready-to-Ship Large Supply
XT-A089 🚴 3D Forged High-Strength One-Piece Stem Unlike standard stems that compromise on weight or structural integrity, LUNJE’s 089 series is 3D forged and CNC precision-engineered as a single high-strength unit. The ultra-modern hollowed-out design isn't just for aesthetics; it’s a strategic weight-reduction feat that maintains maximum torsional rigidity. This ensures a direct, responsive steering feel for trail-ready performance and professional MTB applications. ( ISO 4210 compliant bike stem ) 💎 Technical Specifications: 🆔 Model: LUNJE® XT-A089 (Universal Standard Stem Factory Series) 🛡️ Process: 3D Forged One-Piece & Advanced CNC Machining (High-Precision Hollow Design / Impact Resistant) ⚙️ Material: Aerospace-Grade 6061-T6 Aluminum Alloy 📏 Size (Clamp): 25.4mm / 31.8mm (Both standards in stock for global compatibility) 📏 Specifications: Length: 60/70/80/90mm, Angle: ±7°, Fork Diameter: 28.6mm (1-1/8") ✅ Standards: ISO 4210 Compliant (SGS Certified Fatigue & Strength Testing) 🎨 Finish: Sandblasted Anodized / Fine Frosted Texture (Corrosion-Resistant) 🌈 Color: Classic Black / Vibrant Red / Cobalt Blue / Golden (Custom Logo / Film-free labeling available) 🏭 Supply: Source Factory Direct / Large-Scale Ready-to-Ship Inventory for OEM Handlebar & Stem Brands
A136🚴♀️This is an ultra-short stem with a 35mm clamp diameter and 35mm length. With the growing popularity of carbon fiber mountain bikes—and some concerns about their strength—many carbon handlebars have adopted a 35mm clamp to increase stiffness. This colorful 35mm aluminum stem is the perfect match for these riders and pairs seamlessly with Alu handlebars like the L035 model, which features the corresponding 35mm clamp diameter. 👉 Product link: https://en.koofbike.com/Product_detail/66.html ：https://en.koofbike.com/Product_detail/80.html To be fully transparent, we have ready stock of the A136 stem in multiple colors, but its sales performance has fallen short of expectations. As a result, we've introduced an adapter plate to make it compatible with the mainstream 31.8mm handlebars. Honestly, it remains one of the most beautiful and affordable 35mm stems on the market. So, where is the real market for 35mm handlebars and matching stems? Perhaps there’s a niche we haven’t yet discovered. I’d love to hear your thoughts! WhatsApp: +86 13798419681 (George) ：#35mmStem #MTBStem #CarbonFiberBike #BikeStem #MountainBikeParts #BikeUpgrades #GravelBike #EnduroBike #OEMBike #BikeTech #CyclingComponents #HardtailBike #CustomBike #BikeLife #MTBLife
✅ One‑click installation for 28.6 mm forks (no cap required). ✅ Say goodbye to back pain! 30° rise handlebar stem, suitable for mountain bikes and road bikes. ✅ Quick installation, forged monolithic design, compatible with 31.8 mm handlebars. 🚵🏻♀️ Contact us for a quote and OEM customization: 📧 Email: spencerchou@koofbicycle.com 📱 WhatsApp: +86 19926456877 🌐 Product page: #MountainBikeStem #DownhillBikes #EnduroBikes #BicycleAccessories #OEMManufacturing
XT-A025 🚵🏻♀️ DH/FR direct‑mount stem. Made from 6061‑T6 aluminum via CNC machining to ensure maximum strength and precise handling. Features a 0° rise for intuitive control, compatible with all standard dual‑crown forks, and clamps onto handlebars with a 31.8 mm diameter. ✅ Lightweight. ✅ Durable. Contact us for pricing and OEM customization: 📧 Email: spencerchou@koofbicycle.com 📱 WhatsApp: +86 19926456877 🌐 Product page: https://en.koofbike.com/Product_detail/71.html #MTBStem #DownhillBike #EnduroBike #BicycleAccessories #OEMManufacturing
XT-A013🚵🏻♀️🚴🏻♂️ LUNJE ±17° Forged Stem - 50-110mm Sizes for MTB & Gravel Bikes - 31.8mm Clamp 1-1/8" Steerer. ✅ Factory Direct OEM Pricing - Custom lengths, angles, and finishes available for bulk orders ✅ Dual-Size Range Optimization - 50-90mm for XC/Trail/Enduro MTB🚵🏻♀️ & 70-110mm for Gravel/Adventure bikes🚴🏻♂️ ✅ Premium CNC Forged 6061 Aluminum - Superior stiffness-to-weight ratio, impact tested for durability ✅ Broad Compatibility - 31.8mm handlebar clamp, 28.6mm steerer, fits most modern mountain and adventure bicycles Ideal for Technical Trail Riding and Bikepacking - Perfect blend of control, comfort, and customization Contact us for quotes and OEM customization: 📧 Email: georgechen@koofbike.com 📱 WhatsApp: +86 13798419681 🌐 Product Page: https://en.koofbike.com/Product_detail/70.html #MTBStem #GravelBike #BikeStem #LUNJEOEM #AdventureBike #BikeParts
XT-A135: Bicycle short stem, 25.4/31.8 mm clamp diameter, 35 mm length, weighing 80 grams—providing agile control. ✅ 3D forged hollow design—high strength with significant weight reduction. ✅ Camouflage anodized finish—military-grade durability and a distinctive look. ✅ Compatible with 25.4/31.8 mm steerer tubes—suitable for mountain bikes, endurance racing bikes, and e‑bikes. ✅ Made from 6061‑T6 aluminum alloy—corrosion-resistant with excellent fatigue strength. ✅ OEM precision manufacturing—reliable performance and seamless brand integration.
✅ CNC Machined 6061 Aluminum - Flawless finish, perfect fit, durable. ✅ Ultra-Lightweight - Reduces weight, full strength. ✅ Includes M6x30 Star Nut - Ready to install, no extra purchase. ✅ 1-1/8" Universal Fit - Fits 28.6mm MTB, road, hybrid bikes. ✅ Sleek Style - Two-tone gradient, custom front-end look. ✅ OEM Quality - High precision, smooth threads, reliable preload.
XT-A014 ✅ Hollow Design - Reduces weight, boosts performance. ✅Anodized Finish - Fade-proof, waterproof, rust-resistant. ✅6061-T6 Aluminum - High-strength, corrosion-resistant. ✅CNC Machined - Precise fit, reliable handling. ✅Ultra-Lightweight - Only 129g, improves responsiveness.
LUNJE 3D Forged + CNC Bicycle Stem: ±15° Rainbow Gradient MTB Stem, OEM/Wholesale
XT-A012 ✅ Lightweight & Durable: Crafted from forged aluminum alloy, this stem offers exceptional strength and rigidity while minimizing weight, perfect for aggressive riding. ✅ ±15° Angle Adjustment: Provides versatile positioning for optimized comfort and control, whether for aggressive downhill descents or efficient climbing. ✅ Striking Aesthetic: Features a unique duotone rainbow gradient finish, adding a bold and stylish look to your mountain bike. ✅ Precision Fit: Designed with a 31.8mm handlebar clamp and compatible with a standard 28.6mm (1-1/8") front fork steerer tube, ensuring a secure and reliable connection. ✅ Versatile Application: The ideal upgrade stem for MTB, enduro, downhill, trail, and all-mountain bicycles, enhancing handling and performance on any terrain.
XT-A109 🏭 OEM CUSTOMIZATION: Maximize safety and minimize weight with our one-piece forged construction. Without welds or joints, this stem offers superior strength and rigidity for aggressive riding. Features a precision 28.6mm steerer clamp for a perfect fit on most modern MTBs. Short stems make the steering direct and immediate Built to handle the demands of DH and Enduro racing Freeride.
XT-A031🚀 LUNJE Aggressive Geometry MTB Stem – Precision Engineered for Aggressive Riding Maximum Stiffness Stealth Black Aluminium One-piece molding with Titanium Hardware Screws Zero-Flex Durable & Stylish for MTB, DH, BMX & Enduro； 💎 Key Innovations: ✓ Ultra-Light & Durable. ✓ Optimized Handling – Short stem design. ✓ Industrial-Grade Strength ensures maximum stability under heavy loads. ✓ Sleek & Functional – Matte CNC-machined surface resists scratches. 🔥 Why Choose LUNJE? 🚴🏼♀Designed for riders who demand instant response and unshakable control on technical trails. 🛠Perfect for OEM brands seeking high-performance, customizable stems with a rugged aesthetic. 🏭 OEM/ODM Solutions: ✓ Multiple lengths & clamp sizes ✓ Custom laser engraving ✓ Bulk pricing for brands, ✓ Rigorous QC testing for impact & fatigue resistance, 📩 Get Your Custom Quote Today! 📧 Email: georgechen@koofbicycle.com 📱 WhatsApp: +86 13798419681 💬 "Already using our stem ? Share your experience below!" 🚴 Tag us in your setup—we love seeing LUNJE parts in action! 🏷️ Trending Hashtags: #MTBStem #ShortStem #LUNJEStem #OEMSupplier
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