Adjustable Bike Stem Riser & Handlebar Extender, Universal 31.8mm Bicycle Stem, ±80° Angle Adjustable MTB Stems for 28.6mm Bike Fork, Compatible with Road Bicycle E-Bike BMX

🚴‍♂️ Multi-angle adjustment maintains a natural, upright riding posture, reducing back and wrist pressure.🔧 One set solves the comfort needs of all 31.8mm diameter stem models, eliminating compatibility concerns.⚡ Lightweight aluminum alloy, strong yet light: Enhances all-terrain riding flexibility and stability.⏱️ Includes 2 dedicated wrenches + illustrated instructions for easy installation and immediate enjoyment of comfortable riding.📦 One set = stem + riser + tools + instruction manual – no extra accessories needed, excellent value.🚴‍♂️🔧 Product Details📏 Key Parameters:Stem Diameter: 31.8mm (Standard Mountain Bike Size)Increaser Height: 138mm (Provides ample lifting space)Stem Height: 145mm (Standard height, can be further increased with an increaser)Adjustment Angle: -80° to +80° (Coverage for all postures from competitive city commutingto casual upright)Number of Washers: 5 (Precise fine-tuning to find the perfect angle)🔍 Material and Craftsmanship:Body: Aluminum Alloy (Perfect balance between lightweight and high strength)🛒 Product List:1 Adjustable Stem1 Stem Increaser2 Dedicated Wrenches (Hex Wrench + Box Wrench)1 Detailed Installation Instruction Manual⚠️ Usage Notes:Please confirm your stem diameter is [not specified] before installation. 31.8mm. Do not exceed the extreme positions (-80°/+80°) when adjusting the angle. After installation, be sure to check that all screws are tight to ensure riding safety. Suitable for recreational riding, mountain biking, road riding, etc., but not recommended for professional extreme sports.

• Precise Adjustment, Revolutionary Comfort for Riding: The adjustable stem + riser combination system precisely adjusts riding posture, completely resolving back pain, wrist strain, and instability during long-distance riding. Thr handlebar risers are especially suitable for riders of different heights and those needing to endure extended rides, achieving "one person, one bike, personalized comfort."
• Universal Compatibility, Fits Multiple Bike Models: Compatible with 31.8mm diameter stems, the riser features 5 adjustment washers, allowing the stem angle to be freely adjusted between -80° and +80°. The bicycle handlebar extender is compatible with mainstream bike types such as mountain bikes, road bikes, BMX bikes, and city bikes, meeting various riding posture requirements, including upright and competitive riding
• Durable Aluminum Alloy, Balancing Safety and Lightweight: The bike riser is constructed from a single piece of high-strength aluminum alloy, offering lightweight construction (reducing riding burden), high strength (suitable for complex terrain), and corrosion resistance (extending lifespan). The bike handle bar extenders can withstand high-intensity use such as city commuting and recreational mountain biking, ensuring safety and reliability
• Quick installation, no professional tools required: The handlebar extension comes standard with 2 dedicated wrenches and a detailed instruction manual. Simply disassemble and install; no professional skills are needed. Easily upgrade your riding posture and allow every cycling enthusiast to quickly enjoy a comfortable riding experience
• Great value kit, all included in one purchase: Includes 1 adjustable stem + 1 height increaser + 2 wrenches + instruction manual. No need to purchase additional accessories; a one-stop solution for riding comfort, offering exceptional value