Vortex 312ZK-37 CAT5 Aluminum Rear Sprocket 415 Pitch 37-Tooth Black

The Vortex 312ZK-37 is a CAT5 lightweight aluminum rear sprocket designed for 415-pitch chain applications. Featuring a striking black anodized finish with contrasting silver machine cuts, this sprocket delivers race-proven performance with a refined look. The 37-tooth configuration provides tunable gearing options for optimizing acceleration and power delivery.

Key Features:

• Lightweight CAT5 aluminum construction — reduces rotational mass for improved throttle response
• 100% CNC manufactured in the U.S.A. to precise tolerances
• 7075 T6 aluminum alloy per Vortex specifications for maximum strength-to-weight ratio
• Anodized first, then CNC machined — produces a durable black finish with bright silver highlights on teeth and grooves
• Saber tooth grooves and patented unique tooth design increases sprocket longevity and reduces chain wear
• Built-in mud grooves help clear debris for consistent performance in off-road conditions
• 415 pitch — compatible with standard 415-pitch chains
• 37 teeth — available in a range of tooth counts to suit different gearing needs

The Vortex 312ZK-37 is a direct upgrade over stock steel sprockets, offering superior durability, reduced weight, and optimized gearing for motocross and off-road riding. Part number breakdown: 312 = fitment series, ZK = black anodized color, 37 = tooth count.