EXTRA 20% Off 2+ Tires
Summit+ Days exclsuive
Get a FREE Castelli Jersey
With select full-price bib short purchase
Exclusive Deals & Giveaways
Summit+ Days is on
New Arrival
New Arrival
Style & Size:
Add Ons
Join Summit Club+ and
The PRO Vibe Sprint Stem is the stiffest stem ever built and your race bike deserves it
What Our Gearhead® Experts Are Saying:
"The PRO Vibe Sprint Stem is the stem I specify without hesitation on any criterium or sprint-focused race build where front-end stiffness is the single most important cockpit variable. The UD carbon construction is genuinely in a different category of rigidity compared to anything else I have put on a race bike, and the damped ride quality is a real engineering achievement that makes it usable across a range of road surfaces rather than just smooth circuit courses. The alloy faceplate is a smart durability detail at the handlebar interface, and at 206 grams it carries the weight of a stem that takes its race application seriously."
Criterium racing and sprint-focused road events place a specific and uncompromising set of demands on stem specification. The repeated hard accelerations, tight cornering at speed, and elbow-to-elbow positioning that define these events expose any flex in the front-end system immediately, translating cockpit compliance directly into lost steering precision and delayed power transfer at the moments when both matter most. The PRO Vibe Sprint Stem was engineered as the definitive answer to those demands, developed by PRO's engineers with the explicit goal of producing the stiffest stem available for race use.
The UD carbon body construction achieves that stiffness objective through a unidirectional fiber orientation that maximizes rigidity along the primary load axis of the stem, eliminating the flex that multi-directional layups introduce in exchange for a marginal compliance benefit that serves no purpose in a race-focused application. The result is a stem that responds to rider input with an immediacy and precision that carbon at this specification level uniquely enables, translating every steering and power input from the rider's hands to the front wheel without mechanical loss through stem deflection. What distinguishes the Vibe Sprint from a stem that simply prioritizes stiffness at the expense of everything else is its ride quality, the UD carbon construction delivers a naturally damped feel that absorbs road surface irregularities and maintains front-end composure over the rough road surfaces and variable pavement quality encountered in real race conditions rather than only on smooth circuits.
The alloy faceplate is a deliberate durability specification at the handlebar clamp interface, providing resistance to the compression and wear that repeated handlebar installation and adjustment generates at a contact point that a carbon-only faceplate would be more vulnerable to over a race season. A proprietary top cap is included to complete the steerer installation cleanly, and two length options at 105mm and 120mm cover the range of reach requirements most commonly encountered across race-geometry road bikes and rider fit preferences in a sprint and criterium-focused application. At 206 grams the stem carries a weight figure appropriate to its carbon construction and race specification level.
Details
- UD carbon race stem engineered to be the stiffest stem available
- UD carbon body delivers a flex-free point and shoot steering feel
- Alloy faceplate adds durability at the handlebar clamp interface
- Surprisingly damped ride quality keeps comfort high despite max stiffness
- Proprietary top cap included for a clean and complete installation
- Available in 105mm and 120mm lengths to suit different rider positions
- Weighs 206g for a carbon stem built to this level of stiffness
- Item #PRSJ068
- Material
- UD carbon body, alloy faceplate
- Length
- 105mm, 120mm
- Includes
- proprietary top cap
- Claimed Weight
- 206g
- Activity
- road cycling, criterium racing