Parameters
Description
Reverse Stem Black-ONE D-2 — a direct mount stem built for e-MTB and aggressive riding, with adjustable handlebar clamp for 31.8 mm and 35 mm bars.
Key features
- Direct mount design for a secure connection between stem and steerer.
- Adjustable clamping range: use the included reducing sleeve to fit 31.8 mm or 35.0 mm handlebars.
- Wide, smooth clamping area for stable fit, also suitable for carbon handlebars.
- E-Safety Level: Category 5 (maximum).
- Tested in EFBE E-MTB Tri Test (EPAC MTB-GR).
- Made from Aluminium 6061 T6 for durability and confident handling.
Who is it for
For riders who want to dial in their position on an e-MTB or MTB and value a direct mount stem with proven safety performance (E-Safety Level 5), whether your handlebar is 31.8 mm or 35 mm.
Use case
- Freeride — for stability and control on rough terrain.
- Downhill (DH) and technical riding — when you need a stiff, reliable front end.
Technical information
| Manufacturer code | 01697 |
| Model | Black-ONE D-2 |
| Mount type | Direct Mount |
| Length | 50 mm |
| Height | 21 mm |
| Handlebar clamp | Ø 31.8 mm & Ø 35.0 mm (with reducer) |
| Material | Aluminium 6061 T6 |
| Weight | 137 g |
| E-Safety Level | Category 5 (maximum) |
| Test | EFBE E-MTB Tri Test (EPAC MTB-GR) |
FAQ
Will this stem fit 31.8 mm and 35 mm handlebars?
Yes — the clamp range is adjustable using the included reducing sleeve.
What does Direct Mount mean here?
It’s a direct connection between the stem and the steerer, helping deliver a stiff, stable front end.
Is it suitable for e-MTB?
Yes — it’s rated E-Safety Level Category 5 (maximum) and tested in EFBE E-MTB Tri Test (EPAC MTB-GR).
Can I use it with a carbon handlebar?
Yes — the description highlights a wide, smooth clamping area designed to work well with carbon handlebars.
