At DMG Motorsports, we present the Vortex Standard Rear Aluminum Sprocket 45T-520 in Silver (Part# 193A-45) — a fitment-specific, 520-pitch rear sprocket built for BMW models running the 520 chain conversion. Vortex has long been regarded as a benchmark supplier in the sprocket market, and this piece is machined from premium 7075 aluminum to shave rotating mass while holding up to the demands of aggressive street and track riding. Whether you're chasing lighter unsprung weight or simply need a durable, precision-fit replacement, this Vortex sprocket delivers the strength-to-weight ratio racers rely on.

Features:

• CNC machined from 7075 aluminum for an optimal balance of strength and light weight
• Unique tooth design engineered to increase sprocket longevity and reduce wear
• Lightening holes help reduce rotating mass for quicker acceleration and deceleration
• Precision manufactured to tight tolerances for smooth, reliable chain engagement
• 45-tooth, 520-pitch configuration designed for BMW 520 chain conversions
• Silver anodized finish that resists corrosion while keeping the classic Vortex look
• Considered the "Standard" in the race industry and trusted by champions across professional road racing

Fitment