Renthal 491--415-40P-OR Ultralight Rear Sprocket 40T KTM 50 SX 2014–2025

✨Renthal 491--415-40P-OR Ultralight Rear Sprocket 40T KTM 50 SX 2014–2025

The Ultralight 40-tooth rear sprocket is engineered to maximize acceleration and power delivery on mini and electric motocross bikes. CNC-machined from specially enhanced 7075-T6 aluminum, this Renthal Ultralight rear sprocket delivers exceptional strength while being approximately 33% lighter than steel, reducing unsprung and rotating mass for improved throttle response and handling.

Designed for race and performance-focused riding, the Renthal Ultralight rear sprocket features a computer-aided ultra-light design and a precision-machined tooth profile that allows the chain to roll smoothly on and off the sprocket. This reduces friction, noise, and wear while improving drivetrain efficiency and usable power at the rear wheel. The anodized orange finish provides excellent corrosion resistance and a factory race-inspired appearance.

Key Features

• CNC-machined aluminum construction for precise fit and strength
• High-strength, specially enhanced 7075-T6 aluminum alloy
• Approximately 33% lighter than comparable steel sprockets
• Ultra-light design reduces unsprung and rotating mass
• Optimized tooth profile for smoother chain engagement, less noise, and longer wear

Vehicle Fitment

• 2024 Gas Gas MC-E 3
• 2021–2024 Gas Gas MC 50
• 2021–2023, 2025 Gas Gas MC-E 5
• 2024 Husqvarna EE 3
• 2021–2022, 2024 Husqvarna EE 5
• 2018–2024 Husqvarna TC50
• 2018–2019 Husqvarna TC 50 Mini
• 2024 KTM SX-E 3
• 2021–2022, 2024 KTM SX-E 5
• 2014–2025 KTM 50 SX
• 2014–2020 KTM 50 SX Mini
• 2014–2016 KTM 50 SXS

Frequently Asked Questions

What riding advantage does a 40-tooth rear sprocket provide?
A 40-tooth sprocket increases rear-wheel torque and acceleration, making it ideal for tighter tracks, younger riders, or conditions where strong low-end power is preferred.

Is this sprocket suitable for race use?
Yes, Renthal Ultralight sprockets are widely used in competitive motocross and electric mini racing due to their lightweight design and durability.

How does aluminum compare to steel for longevity?
The 7075-T6 aluminum used by Renthal offers excellent strength-to-weight ratio and wear resistance while significantly reducing rotating mass compared to steel.

This Ultralight rear sprocket is a proven upgrade for riders and mechanics looking to improve acceleration, reduce drivetrain weight, and maintain consistent performance on mini and electric motocross bikes.

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