Enduro

Maxhit Zero-Stack/External Cup Headset Kit - ZS44/28.6 Upper - EC44/40 Lower

The Enduro Maxhit Zero-Stack/External Cup headset kit is built for riders who want maximum durability from a ZS44/28.6 upper and EC44/40 lower setup—especially under heavy braking loads, hard landings, and wet, gritty conditions. Unlike traditional headsets that rely on separate aluminum cups, the Maxhit design presses the bearing assembly directly into the frame for a tight, space-efficient interface that allows larger balls and higher load capacity than typical headset bearings.

Designed around Enduro angular contact bearings with robust sealing and high-pressure waterproof grease, this kit prioritizes long service life and consistent steering feel. It includes the fork crown race, upper split-ring, upper bearing cap, and a hidden topcap preload adjuster for a clean finish.

Key reasons riders choose this headset kit

1. Maxhit cupless interface - Bearing assembly presses directly into the headtube to reduce parts, improve fit security, and free space for a higher-capacity bearing design
2. Larger ball bearing layout - More than doubles load capacity versus standard headset bearings for better support under hard riding and long-term durability
3. Angular contact bearing geometry - Spreads forces over a larger contact area to minimize wear and maintain smooth, controlled steering
4. Dual-lip labyrinth sealing - Micro-groove seal design helps block sweat, water, and fine grit to extend service intervals
5. 440C stainless steel construction - Corrosion-resistant bearing build paired with extra high-pressure waterproof grease for reliable performance in harsh conditions
6. Correct standard and fitment clarity - Built for frames using ZS44 upper (28.6mm steerer) and EC44 lower with a 40mm crown race for 1-1/8” to 1-1/2” tapered steerers