The Excess Mini Expert 28H P3X1 R24 Rear Hub is a race-focused, budget-friendly cassette rear hub designed specifically for younger BMX racers in the Micro, Mini, Junior, and Expert classes. Its alphanumeric name reflects its driver mechanism, featuring a 3-pawl system (P3X1) that engages with a 24-tooth internal ratchet ring (R24). This combination ensures a balance of weight, durability, and reliable power transfer right from the starting gate.
Technical Specifications
This hub boasts a range of features, as outlined by official distributors BRG Store and USPROBIKES:
Drilling: 28 spoke holes (28H)
Engagement System: 3 pawls acting simultaneously into a 24-point internal ratchet ring (24 points of engagement)
Weight: 363 grams (12.8 ounces)
Shell Material: CNC-machined 6061-T6 aluminum body
Axle Type: Lightweight aluminum inner axle body with 10mm (3/8") female hardware
Freehub Body: Chromoly driver matching the standard Shimano-style cog spline interface
Brake Compatibility: Integrated CenterLock disc rotor mount, allowing use with traditional V-brakes or an upgrade to disc configurations
Deciphering "P3X1 R24"
The hub's unique designation reflects its advanced engineering:
P3X1 (3 Pawls): Features 3 robust chromoly pawls that engage simultaneously, ensuring a secure connection and preventing slippage during high-torque acceleration by lightweight riders.
R24 (24 Ratchets): Includes a 24-tooth engagement ring within the hub shell, delivering a reliable and traditional mechanical setup that minimizes drag during high-speed rolling.
Versatility & System Upgrades
This hub is engineered for adaptability, making it ideal for evolving race bike setups. Key features include:
CenterLock Disc Rotor Bracket: Run it as a standard rim-brake wheel today, and later transition seamlessly to a rear disc brake system without needing a new hub.
Includes alloy lock rings and driver spacers.
Cogs and CenterLock-to-ISO adapters are sold separately.
