BOX Components

Using the notes taken form their award winning BMX bars and stems, the first Box mountain bike stem uses a 3D forging process to deliver robust strength in a lightweight package. Named for the concave shape of the stem body, the Cusp reflects the design found on the Mini Cusp 28.6 BMX stem. 3D Cold Forged from the finest 6061-T6 Aluminum Alloy and given an oversized 35.0mm clamp, if the Box Cusp 35 Stem doesn’t instill the confidence on the trail, then we don’t know what will!

Box Cusp Stems combine the enhanced stiffness of an oversized, 35mm clamp interface with a robust and versatile design that meets the needs of a multitude of users. 3D forged from the finest 6061-T6 Aluminum, Cusp Stems have a highly engineered main body and 4-bolt faceplate with a zero degree rise that provides incredible depth and control across a wide variety of terrain. Designed with modern frame geometries in mind, Cusp Stems are available in three different lengths, making them ideal for today’s trail rider.


Material: 6061-T6 Aluminum
Steerer: 1 1/8"
Clamp: 35.0mm
Extension: 45mm, 55mm
Rise: 0 degrees
Origin: Designed in the US/Made in Taiwan