Kalloy/UNO releases buyer's guide on 3D-forged bike stems

Kalloy Industrial Co., Ltd. has published a new guide aimed at bicycle assemblers, OEM buyers, and riders as e-bike safety rules tighten under Europe’s EN 17404 standard. The guide explains how forging, casting, and CNC machining affect stem strength and fatigue resistance, and why manufacturing method matters more for high-load e-bike use.

Why it matters: - E-bike makers face stricter certification requirements under the European EN 17404 standard. - Stem manufacturing method can affect strength and fatigue resistance, which matters more as e-bikes carry higher average speeds and sustained motor torque through the front end. - The guide is aimed at helping buyers evaluate stem performance beyond basic dimensions like length, angle, and clamp diameter.

What happened: - Kalloy Industrial Co., Ltd., a Taiwan-based manufacturer of bicycle cockpit components under the UNO brand, released a new buyer's guide on 3D-forged bike stems. - The guide is titled "How to Choose the Perfect 3D Forged Bike Stem: A Complete Buyer's Guide." - The company announced the guide on July 22, 2026. - The guide is available here.

The details: - The guide compares three aluminum stem manufacturing methods: casting, CNC machining and forging. - Kalloy/UNO says each process affects a component's internal grain structure and long-term fatigue performance. - The guide says forged aluminum stems are preferred for road, mountain and e-bike applications because forging aligns the metal's grain structure along the shape of the part. - The guide says that alignment improves fatigue resistance compared with cast components. - Kalloy's stem lineup includes rigid, adjustable, foldable and integrated cable-routing (I.C.R.) models. - Those stems use a 3D forging process that shapes aluminum across several dies to produce more complex geometries while preserving grain alignment. - Kalloy says its stems are manufactured to ISO 4210 and EN 17404 certification standards across road, mountain, city, trekking and e-bike product lines.

Between the lines: - The guide is part technical explainer, part buying aid, and it positions manufacturing method as a core purchasing factor rather than a hidden spec. - The timing suggests Kalloy/UNO is using technical education to reinforce the value of forged components just as certification pressure increases for e-bike hardware. - A spokesperson said buyers often focus on length or color and overlook manufacturing process, even though the process has the biggest impact on repeated-stress performance.

What's next: - Bicycle assemblers, OEM buyers and riders can use the guide as a reference point when comparing stem options. - More manufacturers may emphasize fatigue testing, grain structure and certification status as e-bike standards become stricter. - Kalloy/UNO says it will continue supplying bicycle cockpit and seatpost components through its integrated R&D, manufacturing and sales operations.

The bottom line: - As e-bike safety standards tighten, stem manufacturing method is becoming a more important buying decision than many shoppers realize.