.25mm Centerlock Disc Brake Rotor Shims – 4 Pack VeloFuze .25mm Centerlock disc brake rotor shims are designed to precisely adjust rotor spacing. Small variations in hub, fork, frame, and rotor tolerances can lead to brake rub or inconsistent caliper alignment—these shims provide a simple, effective solution. Manufactured in the USA from high-quality stainless steel, each shim delivers consistent thickness, excellent corrosion resistance, and long-term durability. At just 1 gram per shim, they add virtually no weight while allowing you to fine-tune rotor placement for quieter, smoother braking and easier wheel swaps. Ideal for new builds, frame upgrades, or dialed-in brake setups, these Centerlock shims are a must-have for both home mechanics and professional bike shops.