Shop Acros Headsets at BIKE24
Developed in close collaboration with leading bike manufacturers, Acros headsets bring top-tier quality directly to your custom build or upgrade project. The combination of high-quality industrial bearings and multiple sealing layers ensures long-term, low-maintenance performance. Whether your frame uses EC, IS, or ZS standards, Acros offers well-thought-out solutions for all common systems. At BIKE24, you’ll find the complete Acros lineup – from classic headsets to specialized systems with integrated steering stop protection. Bring premium quality to your bike, designed for long-term durability.
Precision Meets Durability
Every Acros headset is packed with thoughtful details and dependable performance for every ride:
- Precise Industrial Bearings: These high-quality ball bearings come with tight tolerances to ensure a play-free ride, lasting for years.
- Multi-layer Sealing System: The clever sealing design protects the bearings from dirt and moisture – even when you’re pushing it on tough rides.
- OEM-Proven: Developed with top bike manufacturers, Acros brings you the same quality found in factory builds.
Acros Headsets at a Glance
Acros categorizes headsets according to your frame’s installation system: EC (External Cup), IS (Integrated System), and ZS (Zero Stack). This standard defines how the headset fits into the head tube. EC systems use external bearing cups pressed into the head tube. IS headsets integrate the bearing directly into the frame, while ZS combines both approaches with flush-fitting bearing cups. To find the right fit for your frame, just check the frame specs.
Acros EC Headsets
EC headsets (External Cup) are the go-to choice for frames with traditional head tubes. The bearing cups sit on the outside of the head tube and are pressed in from the outside. This setup allows for larger bearings, offering higher stiffness and easier replacement when necessary. The Acros EC44 fits most frames with a 44mm internal head tube diameter and works with both straight and tapered forks. With its solid construction, the EC headset is the perfect choice for all riding styles – from road cycling to MTB.
Acros IS Headsets
IS headsets (Integrated System) use a frame-integrated bearing seat, eliminating the need for an external cup. The frame itself forms the bearing surface, allowing for a more compact design and clean look. Acros offers IS42 (top) and IS52 (bottom) for modern tapered systems (1 1/8" to 1.5"). This design saves weight and is widely used in modern carbon frames. Despite the compact design, Acros uses full industrial bearings with reliable sealing. Ideal for those who love a minimalist look without compromising on functionality.
Acros ZS Headsets
ZS headsets (Zero Stack) combine the best of EC and IS: The bearing cups are pressed in but don’t extend beyond the head tube. Acros ZS44 (top) and ZS56 (bottom) are the most common sizes for modern MTB and gravel bikes with tapered forks. The ZS design offers the easy replacement you get with EC systems while keeping a low-profile, integrated look. Many ZS models also support integrated cable routing for a clean, clutter-free cockpit. It’s the perfect balance of functionality and style for today’s bikes. [Link to Acros ZS Headsets]
Acros Blocklock Headsets
Blocklock is Acros’ unique locking system designed for tough conditions. Instead of a traditional star nut and compression system, Blocklock uses a mechanical locking system on the upper bearing. This keeps the headset securely in place, even when you’re hitting rough terrain. Especially for downhill, freeride, or bike park riders, Blocklock guarantees a lasting, play-free ride without constant adjustments. Available for ZS44 and ZS56, in combination with standard lower parts.
Discover Acros Headsets at BIKE24
At BIKE24, you’ll find the full range of Acros headsets for your upgrades and custom builds. We ship quickly so your project doesn’t get delayed. Our expert team is ready to help you choose the right headset and find the perfect match for your frame. With an Acros headset, you’re getting OEM-quality performance – for reliable, long-lasting operation. Don’t forget, we’ve also got stems, handlebars, spacers, and clamps for your next bike project.