Tharsis ThreeFive Alloy Riser Handlebar

What Our Gearhead® Experts Are Saying:

"The PRO Tharsis ThreeFive Alloy Riser Handlebar is the bar I reach for on trail and all-mountain builds where maximum front-end control and durability are the priorities and carbon is not in the budget. The 35mm oversized clamp diameter delivers a genuinely noticeable improvement in steering precision and torsional stiffness over a standard 31.8mm bar, and the variable wall thickness tuning gives it a compliance profile that punches well above its price point. At 250 grams with cutting marks to 720mm it is a highly practical and performance-oriented specification across a wide range of build types."

The move from a standard 31.8mm clamp diameter to an oversized 35mm interface is one of the most mechanically significant upgrades available in mountain bike handlebar specification, and the PRO Tharsis ThreeFive Alloy Riser Handlebar delivers that advantage in an AL-7050 alloy construction engineered for maximum durability and trail-focused control. Developed as the alloy counterpart to PRO's carbon Tharsis ThreeFive platform, it brings the same oversized diameter stiffness benefits to a material that prioritizes resilience and long-term reliability under the repeated impact loads of aggressive trail and all-mountain riding.

The 35mm clamp interface increases the cross-sectional area at the stem junction, reducing flex at the most mechanically loaded point of the handlebar and translating rider input into more immediate and precise front-wheel response. That stiffness improvement is most apparent under hard braking and cornering forces where a standard diameter bar introduces measurable flex that a 35mm bar eliminates, contributing to the confident and connected handling feel that technical terrain demands. Variable alloy tube wall thickness along the bar length tunes the compliance characteristic away from the clamp zone, allowing the bar to absorb trail vibration in the sections where the rider's hands make contact while maintaining the torsional rigidity required at the stem interface.

The AL-7050 alloy specification delivers a strength-to-weight ratio that keeps the bar at 250 grams despite the additional material demands of the oversized diameter, a weight figure that competes favorably with standard diameter alloy bars at comparable widths. The 800mm starting width with clearly indicated cutting marks at intervals to 720mm provides meaningful cockpit customization flexibility across rider shoulder widths, frame geometries, and trail style preferences. A 20mm rise paired with 9-degree backsweep and 4-degree upsweep positions the rider in the natural and confident hand position that current trail and all-mountain frame geometries are designed around, and the 35mm clamp diameter is compatible with the growing range of stems specced for oversized bar interfaces across the performance mountain bike market.