RT Lockring Internal ZIPP 20PKRT Lockring Internal ZIPP 20PK The RT Lockring Internal ZIPP 20PK brings the performance and reliability Zipp is known for, engineered for riders who want dependable gear that stands up to real world use. Lockring Centerlock Rotor 23mm 12 notch internal spline 20pk. Built to Zipp's exacting standards, it's a practical upgrade whether you're heading out for a training ride, a weekend adventure, or the next race. The RT Lockring Internal ZIPP 20PK is in
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