Renthal 385U-520-17P Ultralight Front Sprocket Chain Sprockets - 520 17T

The Renthal 385U-520-17P is a 17-tooth Ultralight front sprocket designed for 520 chain conversion applications. Built to Renthal's exacting standards, this front chainwheel delivers the ideal balance of reduced weight and maximum durability for street and performance motorcycle applications.

Key Features:

• Ultralight CNC-Machined Design: Precision CNC-machined (not stamped) to extremely tight tolerances, with surplus material strategically removed to minimize weight without compromising structural integrity
• Premium Nickel-Chrome-Molybdenum Steel: Constructed from specially developed 655M13 nickel-chrome-molybdenum alloy steel that is case-hardened and core-refined for the ultimate combination of strength and hardness
• 520 Chain Conversion: Designed specifically for 520 chain pitch conversion, reducing drivetrain weight compared to larger chain pitches
• 17 Teeth: 17T configuration for optimized power delivery and gearing ratio
• Reduced Rotating Mass: The Ultralight design reduces rotating gearbox mass for faster engine spin-up and shorter over-run
• 10–15% Lighter Than OEM: Significantly lighter than stock front sprockets, reducing unsprung weight and improving power transfer

Renthal's Ultralight front sprockets are trusted by professional race teams worldwide. The mass-reduction design offers a dual benefit: the overall machine weight is lowered, and reduced rotating inertia allows the engine to rev more freely. Sold individually.