Roost Dominator Titanium Stem
Roost Dominator Ti stem

Roost Dominator Ti stem


Machined G5 Titanium 35mm and 42.5mm reach stem with 31.8mm and 35mm clamp sizes.

  • Global shipping on all orders
  • 30 days easy returns
Guaranteed Safe Checkout

31.8mm Models Back in Stock Now!

Sculpted in Titanium

The Roost Dominator Ti stem is an absolute masterpiece crafted out of a chunk of billet G5 titanium also known as 6AL-4V. G5 is well known for its high strength, low density, and corrosion resistance properties.

G5 titanium (often found in parts for F1 racing, gas turbines, aerospace etc) is also used in sections of our frames for extra strength and stiffness. Many Titanium MTB stems are mostly made from G9 titanium tubes welded together which results in a not-so-sexy looking tuby thing that handles like a wet noodle.

We wanted to design a stem that was not only the sexiest stem on the market but had performance, quality, and bling like all products from Roost Bike. It has a straight 35mm or 42.5mm reach and is available in both 31.8mm and 35mm clamp sizes.

Roost Dominator Titanium Stem front view

New 42.5mm Reach

Based on the popularity of our 35mm stem, some of our customers wanted a slightly longer reach. We designed a new 42.5mm version which is an extension of the original design. It has the same rigid feel and stiffness with that raw Ti industrial finish. 

Roost titanium stem 42mm reach 35mm reach

The Full Ti Cockpit

Get that full titanium cockpit by pairing the Dominator Ti stem with one of our flat, 20mm rise or 30mm rise Ti handlebars. This gives you an beautiful compliant feeling when belting through the rough stuff – but you also get a very direct steering response when torqueing the bars trough a turn or climbing out of the saddle.

Roost Full Ti Cockpit handlebars and stem

Features 31.8 and 35mm Clamps

  • Short 35mm or 42.5mm length
  • 0º rise
  • Super stiff design
  • CNC billet 6AL-4V titanium
  • Stack height 40mm
  • Raw finish.
Roost Dominator Titanium Stem right side on rocks

Additional information

Clamp Size

31.8mm clamp, 35mm clamp


35mm reach, 42.5mm reach


Clamp sizes31.8mm & 35mm31.8mm & 35mm
Rise0 degrees0 degrees
Stack Height40mm40mm
Material6AL-4V G5 Titanium6AL-4V G5 Titanium

Technical Info

When installing the stem tighten the two top bolts first, it is designed to have no gap at the top. Then the lower bolts should be tightened. All bolts at the faceplate should be torqued to 5Nm with the steerer bolts torqued to 6Nm.

The stem is raw finish, if you want brushed finish like the Roost handle bars give it a rub with a scotch bright pad but be carful of the logos. Most customers prefer it in the raw finish.