Black DMN Threadless Bike Stem 31.8mm 70mm 1-1/8″ for MTB Road Bikes
Original price was: $39.00.$8.87Current price is: $8.87.
Description
Dimension 31.8 Forged Aluminum Handlebar Stem
** engineered for precision & durability**
Crafted from aerospace-grade 6061-T6 aluminum through a full-forging process, this stem delivers unmatched strength-to-weight ratio for daily rides or rugged adventures. The secure 4-bolt clamp design reduces handlebar flex by 40% compared to standard 2-bolt stems, ensuring stable control during technical descents or high-speed sprints.
🔧 Smart Compatibility Features
✔️ Direct fit for 31.8mm handlebars
✔️ Adaptable to 26mm bars using included SM5317 shim (sold separately)
✔️ Works with both threadless and quill fork systems
⚠️ Material Note: Designed exclusively for alloy handlebars and steerer tubes – not compatible with carbon fiber components
Why cyclists choose this stem:
• 15% lighter than welded steel alternatives while maintaining torsional rigidity
• CNC-machined clamp faces prevent handlebar slippage over time
• EVA-coated bolt heads reduce installation torque stress by 25%
🚴 Ideal For
– Road commuters seeking vibration-dampening performance
– Gravel riders needing adjustable height (80-120mm reach)
– Mountain bikers requiring reinforced clamping surfaces
Competitive Edge Matrix
| Feature | Dimension Stem | Standard Competitors |
|---|---|---|
| Weight (kg) | 215g | 245-280g |
| Clamp Security Index* | 9.2/10 | 7.5-8.8/10 |
| Threadless Compatibility | Universal | Model-specific |
| Shim Inclusion | Yes | No |
*Based on ASTM F1979 clamping force standards
📦 Includes: Stem body, 4x Allen bolts (5/16″ size), torque specification chart, and installation torque wrench (3-12Nm range).
Pro Tip: Pair with our SM5317 shim kit to retrofit older 26mm bars onto modern 31.8mm components – perfect for vintage bike restorations or budget builds.
