RCB SP 522 SPORTS RIM F 250×17 R 350×17 R15V3/V4

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RCB SP522 Alloy Sport Rim Set is an elite, track-focused wheel upgrade engineered specifically for the Yamaha YZF-R15 V3, R15 V4, and R15M.

Widely recognized as the benchmark choice for underbone and lightweight sportbike racing across Southeast Asia, the SP522 series focuses on extreme weight reduction and maximum structural integrity. This specific kit features a 2.50 x 17-inch Front and a 3.50 x 17-inch Rear configuration, matching the ideal tire profile geometry required for high-speed track performance and aggressive street cornering.

Key Features

• Ultra-Lightweight 5-Spoke Architecture: The SP522 features a signature minimalist 5-spoke layout. By shedding substantial unsprung weight and rotational mass compared to stock heavy multi-spoke wheels, it lowers the bike’s rotational inertia. This translates directly to lightning-fast acceleration, lighter turn-in transitions, and late-braking efficiency.

• Aviation-Grade T6 Aluminum Alloy: Cast using highly refined aluminum composite and subjected to rigorous T6 structural heat treatment. This manufacturing process alters the alloy’s crystalline structure, yielding immense tensile strength that resists cracking and structural deformation under heavy track curb impacts or rough road conditions.

• Continuous Flow Hub Casting: The center hub and spokes are cast as a single monolithic unit. This eliminates structural weak points, providing uniform load distribution and extreme stiffness when the bike is subjected to maximum lateral G-forces at full lean angles.

• Sand-Blast Anodized Racing Finish: Coated in RCB’s iconic, chemically stable matte gold or matte black race finish. This treatment is highly resistant to blistering heat, corrosive brake fluid, tire changing tools, and high-velocity track debris.

• Optimized Tubeless Tyre Bed: Engineered with precision-machined safety humps along the inner rim bead. This architecture locks tubeless performance tires firmly in place, eliminating the risk of sudden tire de-beading or pressure drop during hard, low-pressure cornering.

Technical Specifications

Performance Advantages

The Yamaha R15 platform is highly praised for its sharp handling, but stock cast wheels can feel sluggish during high-speed directional changes. Upgrading to the RCB SP522 Wheel Set completely alters the chassis dynamics. With less rotating mass at the wheel ends, your front inverted forks and rear monocross suspension do not have to work as hard to keep the tires planted. Flicking the bike through tight S-curves requires far less physical effort, and the engine reaches its peak power band quicker.

Installation Guidelines

1. Direct OEM Component Transfer: This set is fully plug-and-play, accepting your factory R15 brake discs, dual-channel ABS tone rings, and speed sensors. When transferring your brake rotors, always utilize a medium-strength threadlocker on the bolts and torque them crosswise to factory specifications.

2. Verify Spacer & Bearing Seating: The wheels arrive pre-packed with high-speed precision bearings. Ensure the factory internal axle wheel spacers are perfectly cleaned and lubricated with waterproof grease before sliding the main axles through.

3. Use Care During Tyre Mounting: Because the SP522 is built as a lightweight racing wheel, its rim lips are finely tuned. Ensure your tire technician utilizes plastic rim protectors and proper mounting machine clamps to prevent gouging the anodized finish or distorting the rim lip.

4. Balance Before Speed: Due to the high velocities the R15 V3/V4 can maintain, professional dynamic wheel balancing with adhesive weights is highly recommended post-tire installation to guarantee vibration-free tracking at triple-digit speeds.