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Highly adjustable stem for growth

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LUNJE XT-A139 Double Adjustable Bike Stem: 25.4mm CNC Aluminum Dual-Pivot Stem for Kids' Bikes, Folding Bikes & E-bikes - Reach & Height Extension Cockpit Upgrade

LUNJE XT-A139 Double Adjustable Bike Stem: 25.4mm CNC Aluminum Dual-Pivot Stem for Kids' Bikes, Folding Bikes & E-bikes - Reach & Height Extension Cockpit Upgrade


XT-A139 CNC Material: AL 6061-T6 Feature: CNC machined Ext Length: 45mm Caliber: 25.4mm Angle: 0° Height: 40mm Weight:125g Color: Anodized four color option

Keyword:

LUNJE XT-A139

Double Adjustable Stem

Dual-Pivot Adjustable Stem

Folding Bike stem

Kids' Bike stem

Reach & Height Extension

Cockpit Upgrade

Highly adjustable stem for growth

folding bike stem upgrade

6061 alloy stem

CNC alloy stem

25.4mm handlebar clamp

Wholesale Bicycle Components

Latest Products

LUNJE® ISO 4210 Seatpost Factory - 3D Forged One-Piece Alloy Post (27.2/30.9/31.6mm) for Bulk MTB Components

25.4mm Series 30-190mm High Rise Aluminum Handlebar: For Folding Bikes / Kids' Bikes / City Commuters / Folding E-Bikes, LUNJE Factory ISO Certified OEM Support

LUNJE® 3D Forged Suspension Stem Factory - SGS Certified Adjustable ±60° Shock Absorber for E-Bike/Gravel/Trekking Upgrade

LUNJE MTB Bike Fork Stem Extender Handlebar Riser Adapter 28.6*90/115/150/180/210mm Bicycle Front Fork Accessories

LUNJE® Alloy Seatpost Manufacturer - P341-2 ISO 4210 & EPR Certified OEM Factory

LUNJE Aero Suspension Seatpost: Best 25mm Offset Adjustable Seatpost for MTB & Gravel

LUNJE® XT-LB011 Integrated Road Handlebar | Wind-Breaking Aero Drop Bar with Full Internal Cable Routing

LUNJE 5.5mm Thickened e-MTB Handlebar for Surron, Talaria 6061 Aluminum Butted 28.6mm Clamp, 800mm Width (50/70/90mm Rise) Upgrade for Light Bee Sting Electric Dirt Bike & Motorcycle OEM Replacement

LUNJE Patented Adjustable Seatpost: 13° Tilt & 24mm Offset , 27.2/31.6mm & 33.9mm/30.9mm 7x7/7x9 Carbon & Steel Rail Compatible OEM Source Factory

LUNJE® MTB Heavy Duty Stem CNC Factory - OEM SGS Certified M6 Bolt High-Torque Alloy bike stem manufacturer for Enduro, Downhill & E-MTB

Latest News

Invitation to China Cycle 2026 | Booth [E3] 0737

Resilience Amidst Volatility: China Cycle 2026 Maps the New Global Supply Chain Landscape

Industry Report: The Rise of Double Adjustable Stems in the High-End Kids' Bike Market

2026 Cycling Peak Alert: Beating the CNY Shutdown & Migration Crunch — Why LUNJE Components are the "Hard Currency" of Global Trade This Year

From Eurobike Germany to Canton Fair China: The Global Brand Evolution of LUNJE—The Original Factory

LUNJE Global Influencers: Professional Riders’ Choice for Handlebars Stems Seatpost Bottlecage

Contact Information

+8618988779696

leedr@koofbicycle.com

Building 3, 4th Floor, Pufite Technology Park, Dalang Street, Longhua District, Shenzhen

  • Home

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    • Company Profile

    • Factory and equipment

    • Honors and Qualifications

  • Contact Us

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LUNJE Online Customer Service:8613798419681

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