Reverse Components Black-ONE D-2 Titanium Stem - 35mm x 31.8mm / 35.0mm (Silver)

1 Stem, 2 handlebar diameters. The Black-One D-2 stem builds on the success of our flagship Black One Enduro stem and brings in the ability to run both Ø31.8mm and Ø35mm handlebars with one stem. The special edition D-2 Titanium shares the same design with additional precision machining, a polished finish, and titanium bolts—bringing the weight down to a cool 127g while maintaining full gravity-level strength.

The specially designed shim allows the use of Ø31.8mm bars, and when removed, it works as an Ø35mm stem. The shim provides a wide, smooth clamping area which is ideal for use with carbon bars. The intelligent no-gap clamping design in the bottom ensures no pinch points and equal clamping force for safety and stability, as the highest loads and notching effects are always at the bottom of the handlebar.

Use the online Reverse Stem Calculator to check how changing length or angle affects your reach and stack.

Check out the catalog details: Reverse E-Series Catalog PDF

Key Features

Dual Diameter Versatility: Fits both 31.8mm and 35.0mm handlebars using the included precision reducer shim.


Titanium Upgrade: Outfitted with high-strength titanium bolts for weight savings and corrosion resistance.


No-Gap Clamping Design: Bottom clamping design eliminates pinch points and distributes clamping force evenly, extending carbon or alloy handlebar life.


Gravity & E-Bike Certified: Rated to Category 5 maximum E-Safety level (EFBE E-MTB Tri Test EPAC MTB-GR tested) with a max rider/bike weight of 130 kg.

Specifications

• Brand: Reverse Components


• Model: Black-ONE D-2 Titanium


• Product Type: Mountain Bike Stem


• Length: 35 mm


• Handlebar Clamping Diameter: 31.8 mm & 35.0 mm


• Steerer Tube Diameter: 1 1/8" (28.6 mm)


• Angle: 8°


• Stack Height: 40 mm


• Clamping Platform Width: 50 mm


• Weight: 127g (+/- 5% weight tolerance)


• Material: 6061 T6 Aluminum with Titanium Hardware


• Color: Silver


• Max Rider + Bike Weight: 130 kg


• Testing & Safety: EFBE Category 5 / EPAC MTB-GR Tested


• Included Extras: Reducer shim, matching top cap with screw & star nut, micro-adjustment alignment lines


• Item Code / SKU: 01637


• EAN: 4717480168651