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Designed for speed, built for reliability.
RG3 hubs are engineered to inspire confidence on any road.
Unit price per
The Project321 RG3 100x12 Front Hub
The RG3 is Project321's new hub platform designed specifically for road and gravel riders who demand precision, speed, and durability across any road surface. Building on our proven M-Pulse Technology, RG3 delivers instant, rock-solid engagement, ultra-low drag, and unmatched reliability—whether you are hammering on smooth tarmac or grinding through unpredictable gravel terrain.
Project321’s reputation for toughness and innovation extends to the RG3 hubs, which deliver the same performance DNA to road and gravel riding. RG3 features a stiff axle and bearing platform, refined internal architecture, advanced sealing, and their game-changing 6-Lock rotor system, making it a truly versatile option for today's performance-driven riders.
Learn more about the technology behind RG3.
Specifications:
- Axle Compatibility: 12x100 (Thru-Axle Only)
- Weight for Pair: Starting at 370g (XDR)
Description
The Project321 RG3 100x12 Front Hub
The RG3 is Project321's new hub platform designed specifically for road and gravel riders who demand precision, speed, and durability across any road surface. Building on our proven M-Pulse Technology, RG3 delivers instant, rock-solid engagement, ultra-low drag, and unmatched reliability—whether you are hammering on smooth tarmac or grinding through unpredictable gravel terrain.
Project321’s reputation for toughness and innovation extends to the RG3 hubs, which deliver the same performance DNA to road and gravel riding. RG3 features a stiff axle and bearing platform, refined internal architecture, advanced sealing, and their game-changing 6-Lock rotor system, making it a truly versatile option for today's performance-driven riders.
Learn more about the technology behind RG3.
Specifications:
- Axle Compatibility: 12x100 (Thru-Axle Only)
- Weight for Pair: Starting at 370g (XDR)
Hub Dimension Chart

Hub Comparison Chart

P321 Warranty
If you are experiencing issues with your Project 321 hubs and you feel you require warranty help, please use the link below to learn more.