Stems Builder 31 On Bars Stems Builder 31 Top Stems Builder 31 35 Side Stems Builder 31 50 Side
31.8mm / 35mm
31.8mm / 50mm
35mm / 35mm
35mm / 50mm

Builder Stem 31.8 & 35


The Downlow

Discontinued - Replaced by the Binary Stem

Support the Trails and Your Local Trail Builder!

As part of our Trail Builder series this stem was designed to hold like a trail builder’s grip on their tools. This fully CNC-machined stem has an incredibly precise bar interface that’s light enough for your race bike and strong enough for gravity rides.

Available in 35mm and 50mm lengths, the Builder stem uses a carbon and alloy friendly bar/stem interface with an increased clamping surface. By increasing the clamping surface area and utilizing our controlled clamping system we have created a stronger and more precise stem.

To find out more about 8-Bit Alloy and our Controlled Clamping System go to our Technology Page.


Clamp: 31.8mm 35mm
Lengths: 35mm / 50mm 35mm / 50mm
Weight: 150 grams (50mm version) 150 grams (50mm version)
Stack Height: 40mm 40mm

Builder Stem Install Video