DMR Defy Stem - 35mm - 31.8mm
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Product Information
Full details
The DMR Defy Stem is designed for trail and all-mountain riders seeking an aggressive, stable cockpit setup that prioritizes rider safety. Its standout feature is the clever internal steerer clamp design, which eliminates protruding bolts that can cause knee injuries during technical maneuvers, though riders must ensure their steerer tube length is compatible with its specific 27mm stack height.
All features
| Model Part Number | DMR-STM-DEFY2-35-CA |
|---|---|
| Brand | DMR |
Extended Product Information
FAQs
Does this stem fit 35mm bars?
No, this specific model is designed exclusively for 31.8mm diameter handlebars.
What is the weight of the DMR Defy stem?
The stem weighs approximately 176g.
Is the stem cap included?
Yes, a matching stem cap is included with the product.
What is the primary benefit of the internal steerer clamp?
The primary benefit is safety; it hides the bolts to prevent knee injuries during riding.
Can I use this for downhill racing?
While it is built for Trail and All-Mountain use, its robust construction is suitable for a wide range of aggressive riding disciplines.
Troubleshooting
Handlebars slipping or rotating
Ensure the faceplate bolts are torqued to specifications and check that no grease has migrated into the clamping area.
Difficulty accessing internal steerer bolts
Use a long-reach ball-end hex key to access the internal clamp bolts securely without stripping the heads.
Front end feels too low
Since the stack height is 27mm, add additional headset spacers below the stem to achieve your preferred rise.
Pros and Cons
Pros
- Knee-friendly design with internal steerer bolts
- Extremely stable wide-clamp interface
- Ideal for aggressive modern frame geometry
- Lightweight yet durable build
Cons
- Only compatible with 31.8mm handlebar diameter
- Low 27mm stack height may require extra spacers
- Not compatible with 35mm diameter handlebars
Setup, Compatibility & Care
Installation requires standard metric hex keys. Ensure your steerer tube is cut to accommodate the 27mm stack height. When installing, tighten the top-close faceplate bolts in an 'X' pattern to ensure even pressure distribution across the handlebar. Always use a torque wrench to meet the manufacturer's specifications to prevent damaging your bars or the stem threads. Regularly inspect the internal clamp bolts for signs of wear or loosening after particularly muddy or wet rides. Keep the interface clean and lightly greased to prevent seizing.