EVOSID 40mm MTB Handlebar Stem 31.8mm CNC Aluminum Alloy
EVOSID 40mm MTB Handlebar Stem 31.8mm CNC Aluminum Alloy
EVOSID 40mm Short MTB Bicycle Handlebar Stem – CNC Machined 6061 Aluminum
Upgrade your mountain bike's handling with the EVOSID 40mm Short Handlebar Stem. Precision CNC-machined from heat-treated T6-6061 aluminum alloy, this lightweight yet incredibly strong stem is designed to give you agile, responsive steering on the trail. Whether you're tackling technical singletrack or shredding aggressive descents, this short stem keeps your front end nimble and under control.
Key Features
- CNC Precision Machined – Tight tolerances and clean finishing for a perfect fit every time
- T6-6061 Heat-Treated Aluminum Alloy – Excellent strength-to-weight ratio, tough and corrosion-resistant
- 40mm Short Length – Promotes agile steering and a more responsive, direct ride feel
- Lightweight – Weighs only 139g, keeping your build light without sacrificing durability
- Universal Fit – 28.6mm fork clamp diameter and 31.8mm handlebar clamp diameter fits most MTB setups
- Multiple Color Options – Available in Black, Red, Titanium, and Black/Blue to match your build
Specifications
| Brand | EVOSID |
| Length | 40mm |
| Material | T6-6061 Aluminum Alloy (CNC Machined) |
| Fork Clamp Diameter | 28.6mm |
| Handlebar Clamp Diameter | 31.8mm (fits 31.1–32.5mm range) |
| Weight | 139g |
| Colors Available | Black, Red, Titanium, Black Blue |
| Country of Origin | Made in China |
Why Choose a Short 40mm Stem?
A shorter stem shifts your body weight rearward, giving you better control on steep descents and technical terrain. Combined with a wide handlebar, it creates a more stable, confidence-inspiring cockpit — perfect for aggressive trail, enduro, and all-mountain riding styles.
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Frequently Asked Questions
Q: What handlebar diameter is compatible with this 40mm MTB stem?
A: This stem features a 31.8mm handlebar clamp diameter (compatible with handlebars ranging from 31.1mm to 32.5mm), which is the most common standard for modern mountain bikes. Always verify your handlebar's clamp diameter before purchasing.
Q: What fork steerer tube diameter does this stem fit?
A: The stem is designed for a 28.6mm (1-1/8 inch) fork steerer tube, which is the standard size found on the vast majority of MTB forks. Check your fork specifications to confirm compatibility.
Q: Is this stem suitable for aggressive trail or enduro riding?
A: Absolutely. The T6-6061 heat-treated aluminum alloy construction and CNC machining ensure this stem can handle the demands of aggressive trail, enduro, and all-mountain riding. The 40mm short length also enhances steering agility on technical terrain.
Q: How much does this bicycle stem weigh?
A: The EVOSID 40mm MTB handlebar stem weighs just 139 grams, making it an excellent lightweight upgrade for your mountain bike cockpit without compromising on strength or durability.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.